Condensed Consolidated Statement of Cash Flows - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities
Net loss			$ (61,360)	$ (73,743)
Adjustments to reconcile net loss
Depreciation and amortization	$ 22,847	$ 24,779	46,032	51,403
Original issue discount and debt issuance cost amortization			6,857	5,749
Debt modification and extinguishment costs				1,049
Provision for doubtful accounts			(110)	3,334
Deferred income tax provision			(338)	4,623
Share-based compensation expense			1,782	5,459
Foreign currency remeasurement			(980)	288
Loss (gain) on sale of assets			(34,791)	85
Fair value adjustment for interest rate swap			440	4,385
Change in operating assets and liabilities, net effect from acquisitions:
Accounts receivable			38,260	624
Prepaid expenses and other assets			(9,157)	1,260
Accounts payable and accrued liabilities			(8,812)	(12,595)
Related party balances			(642)	(3,899)
Additions to outsource contract costs			(297)	(2,860)
Net cash used in operating activities			(23,116)	(14,838)	$ (63,900)	$ 23,600
Cash flows from investing activities
Purchases of property, plant, and equipment			(5,766)	(9,072)
Additions to internally developed software			(2,216)	(4,007)
Cash paid in acquisition, net of cash received			(3,500)	(5,000)
Proceeds from sale of assets			38,222	20
Net cash provided by (used in) investing activities			26,740	(18,059)
Cash flows from financing activities
Repurchases of Common Stock				(3,480)
Borrowings from other loans			23,248	14,092
Borrowings under factoring arrangement and A/R Facility			149,951	34,050
Principal repayment on borrowings under factoring arrangement and A/R Facility			(66,114)	(31,624)
Proceeds from senior secured term loans				29,850
Lease terminations			(331)	(95)
Cash paid for debt issuance costs			(12,708)	(7)
Borrowings from senior secured revolving facility			29,750	68,000
Repayments on senior secured revolving facility			(14,200)	(68,000)
Principal payments on finance lease obligations			(6,353)	(9,180)
Principal repayments on senior secured term loans and other loans			(29,040)	(21,248)
Net cash provided by financing activities			74,203	12,358
Effect of exchange rates on cash			1	111
Net increase (decrease) in cash and cash equivalents			77,828	(20,428)
Cash, restricted cash, and cash equivalents
Beginning of period			14,099	43,854	43,854
End of period	91,927	$ 23,426	91,927	23,426	$ 14,099	$ 43,854
Supplemental cash flow data:
Income tax payments, net of refunds received			1,339	5,181
Interest paid			76,781	71,211
Noncash investing and financing activities:
Assets acquired through right-of-use arrangements			772	6,778
Settlement gain on related party payable to Ex-Sigma 2	$ 1,287		1,287
Accrued capital expenditures			$ 1,088	$ 1,083