Condensed Consolidated Statement of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities
Net loss	$ (142,390)	$ (178,530)	$ (509,116)
Adjustments to reconcile net loss
Depreciation and amortization	77,150	93,953	100,903
Original issue discount and debt issuance cost amortization	16,319	15,117	11,777
Debt modification and extinguishment costs (gain), net	(30,613)	8,296	1,049
Impairment of goodwill and other intangible assets			349,557
Provision for doubtful accounts	2,714	422	4,304
Deferred income tax provision	6,649	7,940	1,093
Share-based compensation expense	3,940	2,846	7,827
Unrealized foreign currency losses	173	(414)	(511)
Loss (Gain) on sale of assets	(960)	(43,338)	556
Fair value adjustment for interest rate swap	(125)	(375)	4,337
Change in operating assets and liabilities, net of effect from acquisitions
Accounts receivable	17,438	54,538	4,410
Prepaid expenses and other assets	(1,597)	(1,379)	(4,825)
Accounts payable and accrued liabilities	(61,068)	12,015	(19,588)
Related party payables	1,382	(353)	(14,339)
Additions to outsource contract costs	(546)	(519)	(1,285)
Net cash used in operating activities	(111,534)	(29,781)	(63,851)
Cash flows from investing activities
Purchase of property, plant and equipment	(14,574)	(11,663)	(14,360)
Additions to internally developed software	(1,954)	(3,825)	(6,182)
Cash paid for acquisition, net of cash received		(12,500)	(5,000)
Cash paid for earnouts		(700)
Proceeds from sale of assets	7,267	50,126	360
Net cash provided by (used in) investing activities	(9,261)	21,438	(25,182)
Cash flows from financing activities
Repurchases of Common Stock			(3,480)
Cash paid for equity issuance costs from at the market offerings	(13,423)
Borrowings under factoring arrangement and Securitization Facilities	142,501	297,673	68,283
Principal repayment on borrowings under factoring arrangement and Securitization Facilities	(144,965)	(203,841)	(64,976)
Cash paid for withholding taxes on vested RSUs		(7)	(223)
Lease terminations	(1,303)	(337)	(318)
Cash paid for debt issuance costs	(1,181)	(16,205)	(7)
Principal payments on finance lease obligations	(11,471)	(12,758)	(20,465)
Borrowings from senior secured revolving facility	11,000	29,750	206,500
Repayments on senior secured revolving facility	(55)	(14,200)	(141,500)
Proceeds from issuance of 2026 Notes	3,574
Proceeds from senior secured term loans			29,850
Repayments on senior secured term loan and 2023 Notes as part of debts exchanges	(309,305)
Borrowings from other loans	126,352	29,260	39,153
Cash paid for debt repurchases	(71,184)
Principal repayments on senior secured term loans and other loans	(37,186)	(45,973)	(53,678)
Net cash provided by financing activities	98,651	63,362	59,139
Effect of exchange rates on cash	(105)	1,191	139
Net increase (decrease) in cash and cash equivalents	(22,249)	56,210	(29,755)
Cash, restricted cash, and cash equivalents
Beginning of period	70,309	14,099	43,854
End of period	48,060	70,309	14,099
Supplemental cash flow data:
Income tax payments, net of refunds received	3,765	2,695	7,882
Interest paid	188,802	152,678	144,456
Noncash investing and financing activities:
Assets acquired through right-of-use arrangements	3,270	4,372	10,732
Leasehold improvements funded by lessor	125
Settlement gain on related party payable to Ex-Sigma 2		1,287
Accrued capital expenditures	1,652	$ 2,124	$ 1,402
Private Placement
Cash flows from financing activities
Proceeds from issuance of stocks	25,065
At the Market Offering
Cash flows from financing activities
Proceeds from issuance of stocks	379,963
Subscription Agreements
Cash flows from financing activities
Proceeds from issuance of stocks	$ 269