Summary of Significant Accounting Policies (Policies)	6 Months Ended
Jun. 30, 2020
Summary of Significant Accounting Policies
Basis of Presentation and Consolidation	Basis of Presentation and Consolidation The accompanying interim unaudited condensed consolidated financial statements of Solaris Oilfield Infrastructure, Inc. (either individually or together with its subsidiaries, as the context requires, “Solaris Inc.” or the “Company”) have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) and pursuant to the rules and regulations of the United States Securities and Exchange Commission (“SEC”). These financial statements reflect all normal recurring adjustments that are necessary for fair presentation. Operating results for the three and six months ended June 30, 2020 and 2019 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 do not include all information or notes required by GAAP for annual financial statements and should be read together with Solaris Inc.’s Annual Report on Form 10-K for the year ended December 31, 2019 and notes thereto. Solaris Inc. is the managing member of Solaris Oilfield Infrastructure, LLC (“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 attributable to the holders of Solaris Inc.’s Class A common stock All material intercompany transactions and balances have been eliminated upon consolidation.
Use of Estimates	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, collectability of accounts receivable, stock-based compensation, depreciation associated with property, plant and equipment and related impairment considerations of those assets, impairment considerations of goodwill, determination of fair value of intangible assets acquired in business combinations, income taxes, determination of the present value of lease payments and right-of-use assets, inventory valuation and certain other assets and 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.
Inventories	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. Net realizable value is determined, 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. The Company recognized a write down of the carrying value of inventory of $2.6 million to its net realizable value during the six months ended June 30, 2020. There were no impairments recorded for the three months ended June 30, 2020 and 2019 or for the six months ended June 30, 2019. The value of our inventories not expected to be consumed or sold during our next operating cycle are classified as non-current assets in our condensed consolidated balance sheets.
Goodwill	Goodwill Due to the impact of the outbreak of COVID-19 and recent oil market developments on our business, we updated our goodwill impairment assessment as of March 31, 2020. We estimated the fair value for each reporting unit using an income approach including a discounted cash flow analysis and the use of significant unobservable inputs representative of a Level 3 fair value measurement. Some of the more significant assumptions inherent in the income approach include the estimated future net annual cash flows for each reporting unit and the discount rate. The Company selected assumptions used in the discounted cash flow projections using historical data supplemented by current and anticipated market conditions, near term declines and estimated growth rates. These estimates are based upon assumptions believed to be reasonable. However, given the inherent uncertainty in determining the assumptions underlying a discounted cash flow analysis, particularly in the current volatile market, actual results may differ from those used in the Company’s valuations which could result in additional impairment charges in the future. The discount rates used to value the Company’s reporting units were between 10.35% and 13.00%. As a result of the March 31, 2020 evaluation of goodwill, $4,231 of goodwill associated with the 2017 purchase of the assets of Railtronix was impaired during the three months ended March 31. 2020. The goodwill associated with the Loadcraft Industries Ltd. purchase was not impaired. An impairment charge would have resulted if our estimate of fair value was approximately 40% less than the amount determined. No additional facts or circumstances warranted an impairment assessment as of June 30, 2020 and no impairment charges were recognized for the three month period then ended.
Impairment of Long-Lived Assets, Definite-lived Intangible Assets and ROU Assets	As a result of recent volatility in global oil markets driven by significant reductions in demand for oil due to COVID-19 and certain actions by oil producers globally and the expected impact on our businesses, operations and earnings, the Company concluded that such circumstances warranted an evaluation of whether indicators of impairment are present for its asset groups as of March 31, 2020. Based on this evaluation, the Company performed tests for recoverability of the carrying value of these assets using forecasted undiscounted cash flows. The Company noted that the undiscounted cash flows as well as the fair value of the assets associated with our Kingfisher Facility exceeded their carrying values and the Company recognized impairment losses of $37,775, $2,845 and $410 for property, plant and equipment, ROU assets and other receivables, respectively during the three months ended March 31, 2020 and six month ended June 30, 2020. These impairments resulted from an accumulation of factors leading to the loss of significant customers, reduced operating activities and earnings, including impacts resulting from continued volatility in global oil markets and the COVID-19 pandemic. No additional facts or circumstances indicated that indicators of impairment have become present during the three months ended June 30, 2020. However, if these conditions persist for an extended period of time, additional impairment losses may be recognized in relation to our proppant management systems and inventory management software. Given the inherent uncertainty in determining the assumptions underlying both undiscounted and discounted cash flow analyses, particularly in the current volatile market, actual results may differ which could result in additional impairment charges. We estimated the fair value of the Kingfisher Facility using an income approach including a discounted cash flow analysis and the use of significant unobservable inputs representative of a Level 3 fair value measurement. Some of the more significant assumptions inherent in the income approach include the estimated future net annual cash flows for each reporting unit and the discount rate. The Company selected assumptions used in the discounted cash flow projections using historical data supplemented by current and anticipated market conditions and estimated growth rates. These estimates are based upon assumptions believed to be reasonable. The discount rates used to value this reporting unit were between 10.35% and 13.00%. Limited marketability for the assets group exist in the current volatile market and the analysis resulted in a full impairment of the long-lived assets of the reporting unit. There were no impairment indicators for the three or six months ended June 30, 2019.
Recent Accounting Standards	In June 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2016-13, Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”) which replaces the incurred loss impairment methodology under current GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. ASU 2016-13 requires the use of a forward-looking expected credit loss model for accounts receivables, loans and other financial instruments. For public business entities, the amendments are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years, with early adoption permitted. We adopted ASU 2016-13 effective January 1, 2020, which did not have an impact on our condensed consolidated financial statements. Recently Issued Accounting Standards In March 2020, the FASB issued ASU No. 2020-04, Reference Rate Reform, which provides temporary optional guidance to companies impacted by the transition away from the London Interbank Offered Rate (“LIBOR”). The guidance provides certain expedients and exceptions to applying GAAP in order to lessen the potential accounting burden when contracts, hedging relationships, and other transactions that reference LIBOR as a benchmark rate are modified. This guidance is effective upon issuance and expires on December 31, 2022. The Company is currently assessing the impact of the LIBOR transition and this ASU on the Company’s financial statements.

Summary of Significant Accounting Policies (Policies)

6 Months Ended

Jun. 30, 2020

Summary of Significant Accounting Policies

The accompanying interim unaudited condensed consolidated financial statements of Solaris Oilfield Infrastructure, Inc. (either individually or together with its subsidiaries, as the context requires, “Solaris Inc.” or the “Company”) have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) and pursuant to the rules and regulations of the United States Securities and Exchange Commission (“SEC”). These financial statements reflect all normal recurring adjustments that are necessary for fair presentation. Operating results for the three and six months ended June 30, 2020 and 2019 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 do not include all information or notes required by GAAP for annual financial statements and should be read together with Solaris Inc.’s Annual Report on Form 10-K for the year ended December 31, 2019 and notes thereto.

Solaris Inc. is the managing member of Solaris Oilfield Infrastructure, LLC (“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 attributable to the holders of Solaris Inc.’s Class A common stock

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, collectability of accounts receivable, stock-based compensation, depreciation associated with property, plant and equipment and related impairment considerations of those assets, impairment considerations of goodwill, determination of fair value of intangible assets acquired in business combinations, income taxes, determination of the present value of lease payments and right-of-use assets, inventory valuation and certain other assets and 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.

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. Net realizable value is determined, 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. The Company recognized a write down of the carrying value of inventory of $2.6 million to its net realizable value during the six months ended June 30, 2020. There were no impairments recorded for the three months ended June 30, 2020 and 2019 or for the six months ended June 30, 2019. The value of our inventories not expected to be consumed or sold during our next operating cycle are classified as non-current assets in our condensed consolidated balance sheets.

Goodwill

Due to the impact of the outbreak of COVID-19 and recent oil market developments on our business, we updated our goodwill impairment assessment as of March 31, 2020.

We estimated the fair value for each reporting unit using an income approach including a discounted cash flow analysis and the use of significant unobservable inputs representative of a Level 3 fair value measurement. Some of the more significant assumptions inherent in the income approach include the estimated future net annual cash flows for each reporting unit and the discount rate. The Company selected assumptions used in the discounted cash flow projections using historical data supplemented by current and anticipated market conditions, near term declines and estimated growth rates. These estimates are based upon assumptions believed to be reasonable. However, given the inherent uncertainty in determining the assumptions underlying a discounted cash flow analysis, particularly in the current volatile market, actual results may differ from those used in the Company’s valuations which could result in additional impairment charges in the future. The discount rates used to value the Company’s reporting units were between 10.35% and 13.00%. As a result of the March 31, 2020 evaluation of goodwill, $4,231 of goodwill associated with the 2017 purchase of the assets of Railtronix was impaired during the three months ended March 31. 2020. The goodwill associated with the Loadcraft Industries Ltd. purchase was not impaired. An impairment charge would have resulted if our estimate of fair value was approximately 40% less than the amount determined. No additional facts or circumstances warranted an impairment assessment as of June 30, 2020 and no impairment charges were recognized for the three month period then ended.

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

As a result of recent volatility in global oil markets driven by significant reductions in demand for oil due to COVID-19 and certain actions by oil producers globally and the expected impact on our businesses, operations and earnings, the Company concluded that such circumstances warranted an evaluation of whether indicators of impairment are present for its asset groups as of March 31, 2020. Based on this evaluation, the Company performed tests for recoverability of the carrying value of these assets using forecasted undiscounted cash flows.

The Company noted that the undiscounted cash flows as well as the fair value of the assets associated with our Kingfisher Facility exceeded their carrying values and the Company recognized impairment losses of $37,775, $2,845

and $410 for property, plant and equipment, ROU assets and other receivables, respectively during the three months ended March 31, 2020 and six month ended June 30, 2020. These impairments resulted from an accumulation of factors leading to the loss of significant customers, reduced operating activities and earnings, including impacts resulting from continued volatility in global oil markets and the COVID-19 pandemic. No additional facts or circumstances indicated that indicators of impairment have become present during the three months ended June 30, 2020. However, if these conditions persist for an extended period of time, additional impairment losses may be recognized in relation to our proppant management systems and inventory management software.

Given the inherent uncertainty in determining the assumptions underlying both undiscounted and discounted cash flow analyses, particularly in the current volatile market, actual results may differ which could result in additional impairment charges. We estimated the fair value of the Kingfisher Facility using an income approach including a discounted cash flow analysis and the use of significant unobservable inputs representative of a Level 3 fair value measurement. Some of the more significant assumptions inherent in the income approach include the estimated future net annual cash flows for each reporting unit and the discount rate. The Company selected assumptions used in the discounted cash flow projections using historical data supplemented by current and anticipated market conditions and estimated growth rates. These estimates are based upon assumptions believed to be reasonable. The discount rates used to value this reporting unit were between 10.35% and 13.00%. Limited marketability for the assets group exist in the current volatile market and the analysis resulted in a full impairment of the long-lived assets of the reporting unit.

There were no impairment indicators for the three or six months ended June 30, 2019.

Recent Accounting Standards

In June 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2016-13, Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”) which replaces the incurred loss impairment methodology under current GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. ASU 2016-13 requires the use of a forward-looking expected credit loss model for accounts receivables, loans and other financial instruments. For public business entities, the amendments are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years, with early adoption permitted. We adopted ASU 2016-13 effective January 1, 2020, which did not have an impact on our condensed consolidated financial statements.

Recently Issued Accounting Standards

In March 2020, the FASB issued ASU No. 2020-04, Reference Rate Reform, which provides temporary optional guidance to companies impacted by the transition away from the London Interbank Offered Rate (“LIBOR”). The guidance provides certain expedients and exceptions to applying GAAP in order to lessen the potential accounting burden when contracts, hedging relationships, and other transactions that reference LIBOR as a benchmark rate are modified. This guidance is effective upon issuance and expires on December 31, 2022. The Company is currently assessing the impact of the LIBOR transition and this ASU on the Company’s financial statements.