UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10‑Q

(Mark One)

☒QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2018

or

☐TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from           to

Commission File Number: 001‑38090

SOLARIS OILFIELD INFRASTRUCTURE, INC.

(Exact name of registrant as specified in its charter)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒  No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T  (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes  ☒  No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b‑2 of the Exchange Act.

If an emerging growth company indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨☒

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b‑2 of the Exchange Act). Yes ☐ No  ☒

As of October 31, 2018, the registrant had 27,387,612 shares of Class A common stock, $0.01 par value per share, and 19,746,455  shares of Class B common stock, $0.00 par value per share, outstanding.

SOLARIS OILFIELD INFRASTRUCTURE, INC.

TABLE OF CONTENTS

CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS

This Quarterly Report on Form 10‑Q (the “Quarterly Report”) includes “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended (the “Securities Act”), and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). Statements that are predictive in nature, that depend upon or refer to future events or conditions or that include the words “believe,” “expect,” “anticipate,” “intend,” “estimate” and other expressions that are predictions of or indicate future events and trends and that do not relate to historical matters identify forward-looking statements. Our forward-looking statements include statements about our business strategy, our industry, our future profitability, our expected capital expenditures and the impact of such expenditures on our performance, the costs of being a publicly traded corporation and our capital programs.

A forward-looking statement may include a statement of the assumptions or bases underlying the forward-looking statement. We believe that we have chosen these assumptions or bases in good faith and that they are reasonable. You are cautioned not to place undue reliance on any forward-looking statements. You should also understand that it is not possible to predict or identify all such factors and should not consider the following list to be a complete statement of all potential risks and uncertainties. Factors that could cause our actual results to differ materially from the results contemplated by such forward-looking statements include:

All forward-looking statements speak only as of the date of this Quarterly Report. You should not place undue reliance on our forward-looking statements. Although forward-looking statements reflect our good faith beliefs at the time they are made, forward-looking statements involve known and unknown risks, uncertainties and other factors, including the factors described under Item 1A, “Risk Factors” in our Annual Report on Form 10-K for the year ended December 31, 2017, this Quarterly Report and in our other filings with the Securities and Exchange Commission (the “SEC”), which may cause our actual results, performance or achievements to differ materially from anticipated future results, performance or achievements expressed or implied by such forward-looking statements. We undertake no obligation to publicly update or revise any forward-looking statement, whether as a result of new information, future events, changed circumstances or otherwise, unless required by law.

PART 1: FINANCIAL INFORMATION

Item 1:     Financial Statements

SOLARIS OILFIELD INFRASTRUCTURE, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(In thousands)

(Unaudited)

The accompanying notes are an integral part of these financial statements.

SOLARIS OILFIELD INFRASTRUCTURE, INC.

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(In thousands, except per share amounts)

(Unaudited)

The accompanying notes are an integral part of these financial statements.

SOLARIS OILFIELD INFRASTRUCTURE, INC.

CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS’ EQUITY

(In thousands)

(Unaudited)

The accompanying notes are an integral part of these financial statements.

SOLARIS OILFIELD INFRASTRUCTURE, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands)

(Unaudited)

The accompanying notes are an integral part of these financial statements.

SOLARIS OILFIELD INFRASTRUCTURE, INC.

Notes to the Condensed Consolidated Financial Statements

(Dollars in thousands)

1.    Organization and Background of Business

Description of Business

We are an independent provider of supply chain management and logistics solutions designed to drive efficiencies and reduce costs for the oil and natural gas industry. We manufacture and provide patented proppant management systems that unload, store and deliver proppant at oil and natural gas well sites. The systems are designed to address the challenges associated with transferring large quantities of proppant to the well site, including the cost and management of last mile logistics.

The systems are deployed in many of the most active oil and natural gas basins in the United States, including the Permian Basin, the Eagle Ford Shale, the SCOOP/STACK Formations, the Haynesville Shale and the Marcellus and Utica Shales.

We also operate an independent, unit-train capable, high speed transload facility in Oklahoma (the “Kingfisher Facility”) that provides rail-to-truck transloading and high-efficiency sand silo storage and transloading services at the facility.  Commercial operations commenced in January 2018 and we completed initial phase one construction at the end of July 2018.  

We also provide software solutions to remotely monitor proppant inventory from the source mine to well site through our Railtronix® and PropView® inventory management systems. Our customers rely on this data to manage distribution of proppant throughout their supply chain.

Organization

Solaris Oilfield Infrastructure, Inc. (“Solaris Inc.” or the “Company”) was incorporated in February 2017 for the purpose of completing an initial public offering in order to operate the business of Solaris Oilfield Infrastructure, LLC (“Solaris LLC”). Our initial public offering (“IPO” or the “Offering”) was completed on May 17, 2017.

In connection with the closing of the IPO, Solaris Inc. became the managing member of Solaris LLC and is responsible for all operational, management and administrative decisions relating to Solaris LLC's business. Solaris Inc. consolidates the financial results of Solaris LLC and its subsidiaries and reports non-controlling interest related to the portion of the units in Solaris LLC (the “Solaris LLC Units”) not owned by Solaris Inc., which will reduce net income (loss) attributable to the holders of Solaris Inc.’s Class A common stock.

2.    Summary of Significant Accounting Policies

Basis of Presentation and Consolidation

The accompanying interim unaudited condensed consolidated financial statements of Solaris Inc. have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) and pursuant to the rules and regulations of the SEC. These financial statements reflect all normal recurring adjustments that are necessary for fair presentation. Operating results for the three and nine months ended September  30, 2018 and 2017 are not necessarily indicative of the results that may be expected for the full year or for any interim period.

The unaudited interim condensed consolidated financial statements should be read in conjunction with Solaris Inc.’s Annual Report on Form 10-K for the year ended December 31, 2017.    

As described in Note 1 – Organization and Background of Business, the Company is the sole managing member for Solaris LLC and consolidates entities in which it has a controlling financial interest. The financial statements for periods prior to the IPO have been adjusted to combine the previously separate entities for presentation purposes.

Thus, for periods prior to the completion of the Offering, the accompanying condensed consolidated financial statements include the historical financial position and results of operations of Solaris LLC and its subsidiaries. All material intercompany transactions and balances have been eliminated upon consolidation.

Use of Estimates

The preparation of condensed consolidated financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Significant estimates used in the preparation of these condensed consolidated financial statements include, but are not limited to, stock-based compensation, depreciation associated with property, plant and equipment and related impairment considerations of those assets, determination of fair value of intangible assets acquired in business combinations and certain liabilities. Actual results could differ from management’s best estimates as additional information or actual results become available in the future, and those differences could be material.

Cash

For the purposes of the statements of cash flows, the Company considers all short-term, highly liquid, investments with an original maturity of three months or less to be cash equivalents. Cash is deposited in demand accounts in federally insured domestic institutions to minimize risk. Accounts at each institution are insured by Federal Deposit Insurance Corporation. Cash balances at times may exceed federally-insured limits. We have not incurred losses related to these deposits.

Accounts Receivable

Accounts receivable consists of trade receivables recorded at the invoice amount, plus accrued revenue that is earned but not yet billed, less an estimated allowance for doubtful accounts (if any). Accounts receivable are generally due within 60 days or less, or in accordance with terms agreed with customers. The Company considers accounts outstanding longer than the payment terms past due. The Company determines the allowance by considering a number of factors, including the length of time trade accounts receivable are past due, previous loss history, the customer’s current ability to pay its obligation, and the condition of the general economy and the industry as a whole. Accounts receivable are written off when they are deemed uncollectible, and payments subsequently received on such receivables are credited to the allowance for doubtful accounts. Allowance for doubtful accounts was zero as of September  30, 2018 and December 31, 2017.

Inventories

Inventories consist of materials used in the manufacturing of the Company’s systems, which include raw materials and purchased parts and is stated at the lower of cost or net realizable value. Detail reviews are performed related to net realizable value, giving consideration to quality, excessive levels, obsolescence and other factors. Adjustments that reduce stated amounts will be recognized as impairments in the condensed consolidated statements of operations. There were no impairments recorded for the three and nine months ended September  30, 2018 and 2017.

Business Combinations

The Company accounts for business combinations using the acquisition method of accounting. Under this method, acquired assets, including separately identifiable intangible assets and any assumed liabilities, are recorded at their acquisition date estimated fair value. The excess of purchase price over the fair value amounts assigned to the assets acquired and liabilities assumed represents the goodwill amount resulting from the acquisition. Determining the fair value of assets acquired and liabilities assumed involves the use of significant estimates and assumptions. Additional information regarding the Company’s business combinations is presented in Note 3 –  Business Combinations.

Property, Plant and Equipment

Property, plant and equipment are stated at cost, or fair value for assets acquired in a business combination, less accumulated depreciation. Depreciation is computed using the straight-line method over the estimated useful service lives of the assets as noted below:

Systems that are in the process of being manufactured and the cost of construction in process at our Kingfisher Facility are considered property, plant and equipment. However, the systems and construction in process do not depreciate until they are fully completed. Systems and construction in process are a culmination of material, labor and overhead.

Expenditures for maintenance and repairs are charged against income (loss) as incurred. Betterments that increase the value or materially extend the life of the related assets are capitalized. Upon sale or disposition of property and equipment, the cost and related accumulated depreciation and amortization are removed from the condensed consolidated financial statements and any resulting gain or loss is recognized in the condensed consolidated statements of operations.

Definite-lived Intangible Assets

Identified intangible assets with determinable lives consist primarily of customer relationships, a non-competition agreement and software acquired in the acquisition of Railtronix, LLC (“Railtronix”) as described further in Note 3, as well as patents that were filed for our systems and other intellectual property. Amortization on these assets is calculated on the straight-line method over the estimated useful lives of the assets, which is five to fifteen years based on estimates the Company believes are reasonable. The Company recorded amortization expense of $195 and  $1 for the three months ended September  30, 2018 and 2017, respectively. The Company recorded amortization expense of $606 and $3 for the nine months ended September 30, 2018 and 2017, respectively.

Identified intangible assets by major classification consist of the following:

Goodwill

Goodwill represents the excess of the purchase price of a business over the estimated fair value of the identifiable assets acquired and liabilities assumed. As of September  30, 2018 and December 31, 2017, the Company reported $17,236 of goodwill related to the 2014 purchase of the silo manufacturing business from Loadcraft Industries Ltd. and the 2017 purchase of the assets of Railtronix (See Note 3 – Business Combinations). The Company evaluates goodwill for impairment annually, as of October 31, or more often as facts and circumstances warrant. Factors such as unexpected adverse economic conditions, competition and market changes may require more frequent assessments. There was no impairment for the three and nine months ended September  30, 2018 and 2017.

Before employing detailed impairment testing methodologies, the Company may first evaluate the likelihood of impairment by considering qualitative factors relevant to the business, such as macroeconomic, industry, market or any other factors that have a significant bearing on fair value. If the Company first utilizes a qualitative approach and determines that it is more likely than not that goodwill is impaired, detailed testing methodologies are then applied. Otherwise, the Company concludes that no impairment has occurred. The Company may also choose to bypass a qualitative approach and opt instead to employ detailed testing methodologies, regardless of a possible more likely than not outcome. If the Company determines through the qualitative approach that detailed testing methodologies are required, or if the qualitative approach is bypassed, the Company compares the fair value of a reporting unit with its carrying amount. An entity should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit.

Impairment of Long-Lived Assets and Definite-lived Intangible Assets

Long-lived assets, such as property, plant, equipment and definite-lived intangible assets, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount may not be recoverable, such as insufficient cash flows or plans to dispose of or sell long-lived assets before the end of their previously estimated useful lives. If the carrying amount is not recoverable, the Company recognizes an impairment loss equal to the amount by which the carrying amount exceeds fair value. The Company estimates fair value based on projected future discounted cash flows. Fair value calculations for long-lived assets and intangible assets contain uncertainties because it requires the Company to apply judgment and estimates concerning future cash flows, strategic plans, useful lives and market performance. The Company also applies judgment in the selection of a discount rate that reflects the risk inherent in the current business model. There was no impairment for the three and nine months ended September  30, 2018 and 2017.

Revenue Recognition

The Company accounts for revenue in accordance with ASC Topic 606, Revenue from Contracts with Customers, which the Company adopted effective January 1, 2018.  The Company applied ASC Topic 606 to all contracts with customers and did not elect practical expedients upon adoption of the standard. No cumulative adjustment to accumulated earnings was required as a result of this adoption, and the adoption did not have a material impact on our condensed consolidated financial statements as no material arrangements prior to the adoption were impacted under the new pronouncement.

In determining the appropriate amount of revenue to be recognized as we fulfill our obligations under the agreement, the following steps must be performed at contract inception: (i) identification of the promised goods or services in the contract; (ii) determination of whether the promised goods or services are performance obligations, including whether they are distinct in the context of the contract; (iii) measurement of the transaction price, including the constraint on variable consideration; (iv) allocation of the transaction price to the performance obligations; and (v) recognition of revenue when (or as) we satisfy each performance obligation.

Revenues from proppant management system rental consist primarily of fixed monthly fees charged to customers for the use of our patented mobile proppant management systems that unload, store and deliver proppant at oil and natural gas well sites as well as the use of our proprietary inventory management system, PropView, which enables our customers to track inventory levels in, and delivery rates from, each silo in a system on a remote and digital basis, both

of which are considered to be separate performance obligations. Contracts with customers are typically on thirty- to sixty-day payment terms. Revenues are recognized over time as the performance obligations are satisfied under the terms of the customer contract. We determined that the performance obligation is satisfied over time as the customer simultaneously receives and consumes the benefits provided by the entity’s performance of services, typically as our systems are used by the customer. We measure progress using an input method based on resources consumed or expended relative to the total resources expected to be consumed or expended. We typically charge our customers for the rental of our systems on a monthly basis under agreements requiring the rental of a minimum number of systems for a period of twelve months. The Company is typically entitled to short fall payments if such minimum contractual obligations are not maintained by our customers. Minimum contractual obligations have been maintained and thus the Company has not recognized revenues related to shortfalls on such take or pay contractual obligations to date.

Revenues from proppant management system services consist primarily of the fees charged to customers for services including mobilization and transportation of our systems, field supervision and support and services coordinating proppant delivery to systems, each of which are considered to be separate performance obligations. Contracts with customers are typically on thirty- to sixty-day payment terms. Revenues are recognized over time as the performance obligations are satisfied under the terms of the customer contract. We determined that the performance obligation for system services including field supervision and support is satisfied over time as the customer simultaneously receives and consumes the benefits provided by the entity’s performance of the services, typically based on fixed weekly or monthly contractual rates for field supervision and support and when the Company provides services coordinating proppant delivery. We measure progress using an input method based on resources consumed or expended relative to the total resources expected to be consumed or expended. When the Company provides mobilization and transportation of our systems on behalf of our customers, we determined that the performance obligation is satisfied at a point in time when the system has reached its intended destination.

Revenues from transloading services consist primarily of the fees charged to customers for transloading proppant at our transloading facility, which is considered to be our performance obligation. Transloading services operations commenced in January 2018. We provide rail-to-truck transloading and high-efficiency sand silo storage and transloading services at the facility. Contracts with customers are typically on thirty- to sixty-day payment terms. Revenues are typically recognized over time as the customer simultaneously receives and consumes the benefits provided by the entity’s performance of the transloading service based on a throughput fee per ton rate for proppant delivered to and transloaded at the facility. We measure progress based on the proppant delivered and transloaded at the facility. Under one of our agreements at the facility, quarterly minimum throughput volumes are required and the Company is entitled to short fall payments if such minimum quarterly contractual obligations are not maintained. These shortfalls are based on fixed minimum volumes at a fixed rate and are recognized over time as throughput volumes transloaded are below minimum throughput volumes required.

Revenues from proppant inventory software services consist primarily of the fees charged to customers for the use of our Railtronix inventory management software, which is considered to be our performance obligation. The Railtronix inventory management software was acquired in December 2017. Revenues are recognized over time as the customer simultaneously receives and consumes the benefits provided by the entity’s performance based on a throughput fee to monitor proppant that is loaded into a railcar, stored at a transload facility or loaded into a truck.

Stock-based Compensation

The Company accounts for its stock-based compensation including grants of restricted stock and options in the condensed consolidated statements of operations based on their estimated fair values on the date of grant. The Company recognizes expense on a straight-line basis over the awards’ vesting period, which is generally the requisite service period.

Solaris LLC previously sponsored a stock-based management compensation program called the 2015 Membership Unit Option Plan (the “Plan”). Solaris LLC accounted for the units under the Plan as compensation cost measured at the fair value of the award on the date of grant using the Black-Scholes option-pricing model.

In connection with the Offering, the options granted under the Plan were modified by a conversion into options under the Solaris Long-Term Incentive Plan (the “LTIP”). Refer also to Note 9 – Equity.

Research and Development

The Company expenses research and development costs as incurred, which is included in selling, general and administrative expenses in the condensed consolidated statements of operations. For the three months ended September  30, 2018 and 2017, research and development costs were $0 and $1, respectively. For the nine months ended September 30, 2018 and 2017, research and development costs were $0 and $197, respectively.

Financial Instruments

The carrying value of the Company’s financial instruments, consisting of cash, accounts receivable, notes receivable, accounts payable, insurance premium financing and accrued expenses, approximates their fair value due to the short maturity of such instruments. Financial instruments also consist of a revolving credit facility and term loans, for which fair value approximates carrying values as the debt bears interest at a variable rate which is reflective of current rates otherwise available to the Company. As of September  30, 2018, we had $8,000 of borrowings under the 2018 Credit Agreement (defined thereafter) outstanding. Unless otherwise noted, it is management’s opinion that the Company is not exposed to significant interest, currency or credit risks arising from these financial instruments.

Fair Value Measurements

The Company’s financial assets and liabilities are to be measured using inputs from the three levels of the fair value hierarchy, of which the first two are considered observable and the last unobservable, which are as follows:

Income Taxes

Solaris Inc. is a corporation and, as a result, is subject to United States federal, state and local income taxes. For the three months ended September  30, 2018 and 2017, we recognized a combined United States federal and state provision for income taxes of $4,237 and $617, respectively. For the nine months ended September  30, 2018 and 2017, we recognized a combined United States federal and state provision for income taxes of $9,541 and $1,137, respectively.

On December 22, 2017, Public Law No. 115-97, commonly referred to as the Tax Cuts and Jobs Act (the “Tax Act”) was enacted into law. The provisions of the Tax Act that impact us include, but are not limited to, (1) reducing the United States federal corporate income tax rate from 35% to 21%,  (2) temporary bonus depreciation will allow for full expensing of certain qualified property acquired after September 27, 2017, (3) limitations on the maximum deduction for net operating loss (NOL) carryforwards generated in tax years beginning after December 31, 2017, to 80 percent of a taxpayer’s taxable income and (4) elimination of certain business deductions and credits, including the deduction for entertainment expenditures.  In conjunction with the Tax Act, the SEC staff issued Staff Accounting Bulletin No. 118, Income Tax Accounting Implications of the Tax Cuts and Jobs Act (SAB 118), which allows us to record provisional amounts during a measurement period not to extend beyond one year of the enactment date. We previously reported provisional amounts of the income tax effects of the Tax Act for which the accounting was  incomplete, but a reasonable estimate could be determined. During the three months ended September 30, 2018, our accounting for the income tax effects of the Tax Act was completed without material changes to the previously provided estimates.

Solaris LLC is treated as a partnership for United States federal income tax purposes and therefore does not pay United States federal income tax on its taxable income. Instead, the Solaris LLC members are liable for federal income tax on their respective shares of the Company’s taxable income reported on the members’ federal income tax returns.

Our revenues are derived through transactions in several states, which may be subject to state and local taxes. Accordingly, we have recorded a liability for state and local taxes that management believes is adequate for activities as of September  30, 2018 and December 31, 2017.

We account for income taxes under the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events included in the condensed consolidated financial statements. Under this method, we determine deferred tax assets and liabilities on the basis of the differences between the book value and tax bases of assets and liabilities by using enacted tax rates in effect for the year in which the differences are expected to reverse. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in income in the period in which the enactment date occurs.

We recognize deferred tax assets to the extent we believe these assets are more-likely-than-not to be realized. In making such a determination, we consider all available positive and negative evidence, including future reversals of existing taxable temporary differences, projected future taxable income, tax planning strategies and recent results of operations.

We record uncertain tax positions on the basis of a two-step process in which (1) we determine whether it is more-likely-than-not the tax positions will be sustained on the basis of the technical merits of the position and (2) for those tax positions meeting the more-likely-than-not recognition threshold, we recognize the largest amount of tax benefit that is more than 50% likely to be realized upon ultimate settlement with the related tax authority.

Interest and penalties related to income taxes are included in the benefit (provision) for income taxes in our condensed consolidated statement of operations. We have not incurred any significant interest or penalties related to income taxes in any of the periods presented.

See Note 10 – Income Taxes for additional information regarding income taxes.

Payable to Related Parties Pursuant to Tax Receivable Agreement

In connection with the IPO, Solaris Inc. entered into a Tax Receivable Agreement (the “Tax Receivable Agreement”) with the existing members of Solaris LLC (each such person and any permitted transferee, a “TRA Holder,” and together, the “TRA Holders”) on May 17, 2017. This agreement generally provides for the payment by Solaris Inc. to each TRA Holder of 85% of the net cash savings, if any, in United States federal, state and local income tax and franchise tax that Solaris Inc. actually realizes (computed using simplifying assumptions to address the impact of state and local taxes or is deemed to realize in certain circumstances in periods after the IPO as a result of (i) certain increases in tax basis that occur as a result of Solaris Inc.’s acquisition (or deemed acquisition for United States federal income tax purposes) of all or a portion of such TRA Holder’s Solaris LLC Units in connection with the IPO or pursuant to the exercise of the Redemption Notice or the Call Right (each as defined in Solaris LLC’s Second Amended and Restated Limited Liability Company Agreement) and (ii) imputed interest deemed to be paid by Solaris Inc. as a result of, and additional tax basis arising from, any payments Solaris makes under the Tax Receivable Agreement. Solaris Inc. will retain the benefit of the remaining 15% of these cash savings. As of September 30, 2018 and December 31, 2017, Solaris Inc. recorded a payable related to the Tax Receivable Agreement of $52,866 and $24,675, respectively. The increase in payables related to the Tax Receivable Agreement is a result of Solaris Inc.’s acquisition (or deemed acquisition for United States federal income tax purposes) of Solaris LLC Units from TRA Holders.

Environmental Matters

The Company is subject to various federal, state and local laws and regulations relating to the protection of the environment. Management has established procedures for the ongoing evaluation of the Company’s operations, to identify potential environmental exposures and to comply with regulatory policies and procedures. Environmental expenditures that relate to current operations are expensed or capitalized as appropriate. Expenditures that relate to an existing condition caused by past operations and do not contribute to current or future revenue generation are expensed as incurred. Liabilities are recorded when environmental costs are probable, and the costs can be reasonably estimated. The Company maintains insurance which may cover in whole or in part certain environmental expenditures. As of September  30, 2018 and December 31, 2017, there were no environmental matters deemed probable.

Segment Information

Operating segments are identified as components of an enterprise about which separate discrete financial information is available for evaluation by the chief operating decision maker, or decision-making group, in making decisions on how to allocate resources and assess performance. The Company’s chief operating decision maker is the Chief Executive Officer. The Company and the Chief Executive Officer view the Company’s operations and manage its business as one operating segment. All long-lived assets of the Company reside in the United States.

Accounting Standards Recently Adopted

In February 2017, the Financial Accounting Standards Board (the “FASB”) issued ASU No. 2017‑05, Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610‑20): Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets ("ASU 2017‑05"). ASU 2017‑05 clarifies the scope of Subtopic 610‑20 and adds guidance for partial sales of nonfinancial assets. Subtopic 610‑20 was issued in May 2014 as part of ASU No. 2014‑09, Revenue from Contracts with Customers (Topic 606) and provides guidance for recognizing gains and losses from the transfer of nonfinancial assets in contracts with noncustomers. The amendments in ASU 2017‑05 clarify that a financial asset is within the scope of Subtopic 610‑20 if it meets the definition of an in substance nonfinancial asset. The amendments also clarify that nonfinancial assets within the scope of Subtopic 610‑20 may include nonfinancial assets transferred within a legal entity to a counterparty. The amendments in ASU 2017‑05 are effective at the same time as the amendments in ASU 2014‑09, which are effective for annual reporting periods beginning after December 15, 2017, including interim reporting periods within that reporting period. Early adoption is permitted for interim or annual reporting periods beginning after December 15, 2016. An entity may elect to apply the amendments in ASU 2017‑05 either retrospectively to each period presented in the financial statements in accordance with the guidance on accounting changes (retrospective approach) or retrospectively with a cumulative-effect adjustment to retained earnings as of the beginning of the fiscal year of adoption (modified retrospective approach). The Company adopted ASU 2017-05 during the quarter ended March 31, 2018 using the modified retrospective approach. Adoption of this ASU did not impact the Company’s opening balance of retained earnings as of January 1, 2018 as our reported results did not differ under the new revenue standard and the previous guidance.

In November 2016, the FASB issued ASU No. 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash ("ASU 2016-18"). ASU 2016-18 is intended to add and clarify guidance on the classification and presentation of restricted cash on the statement of cash flows. ASU 2016-18 requires that a statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. Therefore, amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. The amendments are effective for public business entities for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. The Company adopted ASU 2016-18 during the quarter ended March 31, 2018, which did not have an impact on the condensed consolidated financial statements.

In August 2016, the FASB issued ASU 2016‑15, Statement of Cash Flows (Topic 230), Classification of Certain Cash Receipts and Cash Payments ("ASU 2016-15"), seeking to eliminate diversity in practice related to how certain cash receipts and cash payments are presented and classified in the statement of cash flows. The amendments in ASU 2016‑15 address eight specific cash flow issues and apply to all entities, including both business entities and not-for-profit entities that are required to present a statement of cash flows under FASB ASC 230, Statement of Cash Flows. The amendments in ASU 2016‑15 are effective for public business entities for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. The Company adopted ASU 2016-15 during the quarter ended March 31, 2018, which did not have an impact on the condensed consolidated financial statements.

Accounting Standards Recently Issued But Not Yet Adopted

In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820), Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement (“ASU 2018-13”), modifies the disclosure requirements in Topic 820, Fair Value Measurement, by removing certain disclosure requirements related to the fair value hierarchy, modifying existing disclosure requirements related to measurement uncertainty and adding new

disclosure requirements, such as disclosing the changes in unrealized gains and losses for the period included in other comprehensive income for recurring Level 3 fair value measurements held at the end of the reporting period and disclosing the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements. The amendments in ASU 2018-13 are effective for all entities for fiscal years beginning after December 15, 2019, and interim periods within those fiscal years. We are currently in the process of evaluating the impact, if any, that ASU 2018-13 will have on our condensed consolidated financial statements.

In February 2016, the FASB issued ASU No. 2016‑02, Leases (Topic 842), as part of a joint project with the International Accounting Standards Board to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. To satisfy the foregoing objective, the FASB is creating Topic 842, Leases, which supersedes Topic 840. Under the new guidance, a lessee will be required to recognize assets and liabilities for capital and operating leases with lease terms of more than 12 months. Additionally, this ASU will require disclosures to help investors and other financial statement users better understand the amount, timing, and uncertainty of cash flows arising from leases, including qualitative and quantitative requirements. For public business entities, the amendments are effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, with early adoption permitted. In July 2018, the FASB issued ASU No. 2018-11, Leases (Topic 842), Targeted Improvements (“ASU 2018-11”), which provides an optional practical expedient to adopt the new lease requirements through a cumulative effect adjustment in the period of adoption. The Company plans to apply the new optional transition guidance.

The Company has determined its portfolio of leased assets and is reviewing all related contracts to determine the impact the adoption will have on its condensed consolidated financial statements and related disclosures. Solaris anticipates the adoption of this standard will significantly impact its condensed consolidated financial statements, systems, processes and controls. While the Company cannot currently estimate the quantitative effect that ASU 2016-02 will have on its condensed consolidated financial statements, the adoption will increase asset and liability balances on the consolidated balance sheets due to the required recognition of right-of-use assets and corresponding right-of-use liabilities.

3.    Business Combinations

On December 6, 2017 the Company completed its acquisition of substantially all of the assets of Railtronix, a leading provider of real-time inventory management solutions for proppant mining, rail shipping and transloading operations, for $9,505 including $5,000 cash consideration, and $4,505 equity consideration of 279,655 Solaris LLC Units and 279,655 shares of Class B common stock. The equity consideration was based on the closing price of our Class A common stock on December 6, 2017 of $16.11.

The purchase price was allocated based on the fair value of $4,697,  $225 and $346 for identifiable intangible assets including customer relationships, a non-competition agreement and software, respectively. The amount of consideration in excess of the fair value of identifiable intangible assets of $4,237 was recognized as goodwill. The valuations to derive the allocation of purchase price included a multi period excess earnings valuation method, with or without valuation method, and relief from royalty valuation method estimates using estimates for future cash flows from customer relationships, return on workforce, customer attrition, working capital assumptions, income taxes, competition, costs saved through owning the asset and risk adjusted discount rates.

The goodwill recognized is attributable to expected customer growth as well as expected synergies of integrating Railtronix with the Company’s PropView inventory management system, which we believe will uniquely position the Company to provide critical supply chain data to help our customers improve the reliability of proppant supply, save time and reduce the delivered cost of proppant by monitoring key data points and performance indicators. A portion of goodwill is expected to be deductible for corporate income tax purposes.

The actual impact of this acquisition was an increase to “Total revenues” of $602 and $1,950 and  an increase to “Net income” of $218 and a decrease to “Net income” of $941 in the condensed consolidated statement of operations for the three and nine months ended September  30, 2018, respectively. The unaudited pro forma results presented below have been prepared to give the effect of the acquisition discussed above on our results of operations for the three and

nine months ended September  30, 2017 as if it had been consummated on January 1, 2016. The unaudited pro forma results do not purport to represent what our actual results of operations would have been if the acquisition had been completed on such date or to project our results of operation for any future date or period.

Certain contingent performance-based cash awards totaling $2,500 are also payable to the seller upon the achievement of certain financial milestones. One milestone was completed and $1,625 was recognized and paid in the quarter ending March 31, 2018 and is recorded in other operating expense. The Company has not yet concluded that it is probable that the remaining milestones will be achieved and thus has not recognized the additional $875 obligation in the condensed consolidated financial statements.

4.    Prepaid Expenses and Other Current Assets

Prepaid expenses and other currents assets were comprised of the following at September  30, 2018 and December 31, 2017:

5.    Property, Plant and Equipment

Property, plant and equipment was comprised of the following at September  30, 2018 and December 31, 2017:

Depreciation expense for the three months ended September  30, 2018 and 2017 was $5,133 and $1,741, respectively, of which $4,133 and $1,523 is attributable to cost of proppant management system rental, $347 and $129 is attributable to cost of proppant management system services, $529 and $0 is attributable to cost of transloading services

and $124 and $89 is attributable to selling, general and administrative expenses, respectively. Depreciation expense for the nine months ended September 30, 2018 and 2017 was $11,908 and $4,273, respectively, of which $10,128 and $3,748 is attributable to cost of proppant management system rental, $889 and $283 is attributable to cost of proppant management system services, $544 and $0 is attributable to cost of transloading services and $347 and $242 is attributable to selling, general and administrative expenses, respectively. The Company capitalized $182 and $172 of depreciation expense associated with machinery and equipment used in the manufacturing of its systems for the three months ended September  30, 2018 and 2017, respectively. The Company capitalized $501 and $492 of depreciation expense associated with machinery and equipment used in the manufacturing of its systems for the nine months ended September 30, 2018 and 2017, respectively.

In July 2017, the Company acquired a lease for $250 in connection with the Kingfisher Facility described in Note 12. Refer to Note 12 – Commitments and Contingencies. The Kingfisher Facility is recognized in property, plant and equipment as Transloading facility and equipment.

6.    Accrued Liabilities

Accrued liabilities were comprised of the following at September 30, 2018 and December 31, 2017: