SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND PRACTICES (Policies)	3 Months Ended
Mar. 31, 2021
Accounting Policies [Abstract]
Basis for presentation	Basis for presentation. In the opinion of management, these unaudited interim condensed consolidated financial statements reflect all adjustments, consisting of normal recurring adjustments, necessary for a fair presentation of results for such periods. The results of operations for any interim period are not necessarily indicative of results for the full year. Certain disclosures have been condensed or omitted from the interim financial statements included in this report. These financial statements should be read in conjunction with the consolidated financial statements and notes contained in our Annual Report on Form 10-K for the year ended December 31, 2020 as filed with the Securities and Exchange Commission (“the 2020 Form 10-K”).
Use of estimates	Use of estimates. Our accounting policies conform to Generally Accepted Accounting Principles in the United States (“GAAP”). The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and judgments that affect our reported financial position and results of operations. We review significant estimates and judgments affecting our consolidated financial statements on a recurring basis and record the effect of any necessary adjustments prior to their publication. Estimates and judgments are based on information available at the time such estimates and judgments are made. Adjustments made with respect to the use of these estimates and judgments often relate to information not previously available. Uncertainties with respect to such estimates and judgments are inherent in the preparation of financial statements. Estimates and judgments are used in, among other things, (1) aspects of revenue recognition, (2) valuation of acquisition related tangible and intangible assets and assessments of all long-lived assets for possible impairment, (3) estimating various factors used to accrue liabilities for workers’ compensation, auto, medical and general liability, (4) establishing an allowance for credit losses, (5) estimating the useful lives of our assets, (6) assessing future tax exposure and the realization of tax assets, (7) selecting assumptions used in the measurement of costs and liabilities associated with defined benefit pension plans, (8) assessments of fair value and (9) managing our foreign currency risk in foreign operations.
Fair value of financial instruments	Fair value of financial instruments. As defined in Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 820 Fair Value Measurements and Disclosure (“ASC 820”), fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. We utilize market data or assumptions that market participants would use in pricing the asset or liability, including assumptions about risk and the risks inherent in the inputs to the valuation technique. These inputs can be readily observable, market corroborated, or generally unobservable. We primarily apply the market approach for recurring fair value measurements and endeavor to utilize the best information available. Accordingly, we utilize valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs. The use of unobservable inputs is intended to allow for fair value determinations in situations in which there is little, if any, market activity for the asset or liability at the measurement date. We are able to classify fair value balances based on the observability of those inputs. ASC 820 establishes a fair value hierarchy such that “Level 1” measurements include unadjusted quoted market prices for identical assets or liabilities in an active market, “Level 2” measurements include quoted market prices for identical assets or liabilities in an active market which have been adjusted for items such as effects of restrictions for transferability and those that are not quoted but are observable through corroboration with observable market data, including quoted market prices for similar assets, and “Level 3” measurements include those that are unobservable and of a highly subjective measure.Our financial instruments consist primarily of cash, cash equivalents, accounts receivable, accounts payable and debt obligations. The carrying amount of cash, cash equivalents, accounts receivable and accounts payable are representative of their respective fair values due to the short-term maturity of these instruments. The fair value of our ABL Facility and Term Loan (each defined in Note 9) is representative of the carrying value based upon the variable terms and management’s opinion that the current rates are available to us with the same maturity and security structure are equivalent to that of the debt.
Earnings (loss) per share	Earnings (loss) per share. Basic earnings (loss) per share (“EPS”) is computed by dividing net income (loss) by the weighted-average number of shares of common stock outstanding during the period. Diluted EPS is computed by dividing net income (loss) by the sum of the weighted-average number of shares of common stock outstanding during the period and, if dilutive, the assumed exercise or conversion of (1) outstanding share-based compensation, (2) our Notes and (3) outstanding Warrants (defined in Note 9). The impact of share-based compensation, the Notes and warrants are calculated using the treasury stock method. Our intent is to settle the principal amount of the Notes in cash upon conversion. If the conversion value exceeds the principal amount, we may elect to deliver shares of our common stock with respect to the remainder of our conversion obligation in excess of the aggregate principal amount.
Newly Adopted Accounting Principles	Newly Adopted Accounting Principles ASU No. 2019-12. In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740) Simplifying the Accounting for Income Taxes, that simplifies the accounting for income taxes by eliminating some exceptions to the general approach in ASC 740, Income Taxes as well as clarifies aspects of existing guidance to promote more consistent application. The adoption of ASU No. 2019-12 had no impact on the current quarter. Accounting Principles Not Yet Adopted ASU No. 2020-04. In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting. The guidance in ASU 2020-04 and ASU 2021-01, Reference Rate Reform (Topic 848): Scope, which was issued in January 2021, provides optional expedients and exceptions for applying GAAP to contract modifications and hedging relationships, subject to meeting certain criteria that reference LIBOR or another rate that is expected to be discontinued. The amendments in ASU 2020-04 are effective for all entities as of March 12, 2020 through December 31, 2022. While we are currently determining whether we will elect the optional expedients, we do not expect our adoption of these ASU’s to have a significant impact on our consolidated financial position, results of operations, and cash flows. ASU No. 2020-06. In August 2020, the FASB issued ASU 2020-06, Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity, which simplifies the accounting for convertible instruments by eliminating certain separation models and will generally be reported as a single liability at its amortized cost. In addition, ASU 2020-06 eliminates the treasury stock method to calculate diluted EPS for convertible instruments and requires the use of the if-converted method. We expect to adopt ASU 2020-06 beginning January 1, 2022, at which time we would utilize the if-converted method, which would require us to assume the Notes would be settled entirely in shares of common stock for purposes of calculating diluted EPS, if the effect would be dilutive. We are still evaluating the other impacts this ASU may have on our financial statements.

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND PRACTICES (Policies)

3 Months Ended

Mar. 31, 2021

Basis for presentation. In the opinion of management, these unaudited interim condensed consolidated financial statements reflect all adjustments, consisting of normal recurring adjustments, necessary for a fair presentation of results for such periods. The results of operations for any interim period are not necessarily indicative of results for the full year. Certain disclosures have been condensed or omitted from the interim financial statements included in this report. These financial statements should be read in conjunction with the consolidated financial statements and notes contained in our Annual Report on Form 10-K for the year ended December 31, 2020 as filed with the Securities and Exchange Commission (“the 2020 Form 10-K”).

Use of estimates

Use of estimates. Our accounting policies conform to Generally Accepted Accounting Principles in the United States (“GAAP”). The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and judgments that affect our reported financial position and results of operations. We review significant estimates and judgments affecting our consolidated financial statements on a recurring basis and record the effect of any necessary adjustments prior to their publication. Estimates and judgments are based on information available at the time such estimates and judgments are made. Adjustments made with respect to the use of these estimates and judgments often relate to information not previously available. Uncertainties with respect to such estimates and judgments are inherent in the preparation of financial statements. Estimates and judgments are used in, among other things, (1) aspects of revenue recognition, (2) valuation of acquisition related tangible and intangible assets and assessments of all long-lived assets for possible impairment, (3) estimating various factors used to accrue liabilities for workers’ compensation, auto, medical and general liability, (4) establishing an allowance for credit losses, (5) estimating the useful lives of our assets, (6) assessing future tax exposure and the realization of tax assets, (7) selecting assumptions used in the measurement of costs and liabilities associated with defined benefit pension plans, (8) assessments of fair value and (9) managing our foreign currency risk in foreign operations.

Fair value of financial instruments

Fair value of financial instruments. As defined in Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 820 Fair Value Measurements and Disclosure (“ASC 820”), fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. We utilize market data or assumptions that market participants would use in pricing the asset or liability, including assumptions about risk and the risks inherent in the inputs to the valuation technique. These inputs can be readily observable, market corroborated, or generally unobservable. We primarily apply the market approach for recurring fair value measurements and endeavor to utilize the best information available. Accordingly, we utilize valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs. The use of unobservable inputs is intended to allow for fair value determinations in situations in which there is little, if any, market activity for the asset or liability at the measurement date. We are able to classify fair value balances based on the observability of those inputs. ASC 820 establishes a fair value hierarchy such that “Level 1” measurements include unadjusted quoted market prices for identical assets or liabilities in an active market, “Level 2” measurements include quoted market prices for identical assets or liabilities in an active market which have been adjusted for items such as effects of restrictions for transferability and those that are not quoted but are observable through corroboration with observable market data, including quoted market prices for similar assets, and “Level 3” measurements include those that are unobservable and of a highly subjective measure.Our financial instruments consist primarily of cash, cash equivalents, accounts receivable, accounts payable and debt obligations. The carrying amount of cash, cash equivalents, accounts receivable and accounts payable are representative of their respective fair values due to the short-term maturity of these instruments. The fair value of our ABL Facility and Term Loan (each defined in Note 9) is representative of the carrying value based upon the variable terms and management’s opinion that the current rates are available to us with the same maturity and security structure are equivalent to that of the debt.

Earnings (loss) per share

Earnings (loss) per share. Basic earnings (loss) per share (“EPS”) is computed by dividing net income (loss) by the weighted-average number of shares of common stock outstanding during the period. Diluted EPS is computed by dividing net income (loss) by the sum of the weighted-average number of shares of common stock outstanding during the period and, if dilutive, the assumed exercise or conversion of (1) outstanding share-based compensation, (2) our Notes and (3) outstanding Warrants (defined in Note 9). The impact of share-based compensation, the Notes and warrants are calculated using the treasury stock method.

Our intent is to settle the principal amount of the Notes in cash upon conversion. If the conversion value exceeds the principal amount, we may elect to deliver shares of our common stock with respect to the remainder of our conversion obligation in excess of the aggregate principal amount.

Newly Adopted Accounting Principles

ASU No. 2019-12. In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740) Simplifying the Accounting for Income Taxes, that simplifies the accounting for income taxes by eliminating some exceptions to the general approach in ASC 740, Income Taxes as well as clarifies aspects of existing guidance to promote more consistent application. The adoption of ASU No. 2019-12 had no impact on the current quarter.

Accounting Principles Not Yet Adopted

ASU No. 2020-04. In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting. The guidance in ASU 2020-04 and ASU 2021-01, Reference Rate Reform (Topic 848): Scope, which was issued in January 2021, provides optional expedients and exceptions for applying GAAP to contract modifications and hedging relationships, subject to meeting certain criteria that reference LIBOR or another rate that is expected to be discontinued. The amendments in ASU 2020-04 are effective for all entities as of March 12, 2020 through December 31, 2022. While we are currently determining whether we will elect the optional expedients, we do not expect our adoption of these ASU’s to have a significant impact on our consolidated financial position, results of operations, and cash flows.

ASU No. 2020-06. In August 2020, the FASB issued ASU 2020-06, Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity, which simplifies the accounting for convertible instruments by eliminating certain separation models and will generally be reported as a single liability at its amortized cost. In addition, ASU 2020-06 eliminates the treasury stock method to calculate diluted EPS for convertible instruments and requires the use of the if-converted method. We expect to adopt ASU 2020-06 beginning January 1, 2022, at which time we would utilize the if-converted method, which would require us to assume the Notes would be settled entirely in shares of common stock for purposes of calculating diluted EPS, if the effect would be dilutive. We are still evaluating the other impacts this ASU may have on our financial statements.