Consolidated Statement of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Operating Activities
Net loss	$ 8,120	$ (5,188)	$ (1,735)	$ (31,169)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization			13,470	14,328
Impairment of goodwill			0	22,708	$ 35,944
Profit on sale of property, plant and equipment			(73)	0
Provision for doubtful accounts			32	889
Amortisation of debt issuance cost			2,827	761
Amortisation of call option premium			480	0
Warrant contra revenue	405	485	830	763
Share-based compensation expense			591	209
Deferred income taxes			(1,255)	1,604
Share of (income)/ loss of equity-accounted investees	(59)	12	(45)	20
Changes in operating assets and liabilities:
Trade accounts receivables			(11,412)	34,022
Prepaid expenses and other assets			(2,971)	(2,301)
Trade accounts payables			(9,965)	(5,920)
Income taxes, net			2,724	(2,314)
Accrued expenses and other current liabilities			9,505	15,558
Net cash generated from operating activities			3,003	49,158
Investing Activities
Purchase of property, plant and equipment			(7,513)	(7,864)
Investment in equity-accounted investees			(25,000)	0
Payments for call option premium			(3,000)	0
Proceeds from equity-accounted investees			104	395
Net cash used in investing activities			(35,409)	(7,469)
Financing Activities
Proceeds from the issuance of common stock			1,283	8,009
Proceeds from long term debt			165,000	0
Payments on long term debt			(117,600)	(4,200)
Payments for loan fees related to long term debt			(2,794)	0
Proceeds from (payments on) other debt, net			(9,431)	(21,210)
Net cash generated from/ (used in) financing activities			36,458	(17,401)
Net increase in cash and cash equivalents			4,052	24,288
Effect of exchange rate changes on cash and cash equivalents and restricted cash			(548)	(497)
Cash and cash equivalents and restricted cash at beginning of the period			50,559	32,626	32,626
Cash and cash equivalents and restricted cash at end of the period	54,063	56,417	54,063	56,417	50,559
Components of cash and cash equivalents and restricted cash
Balance with banks	47,018	47,451	47,018	47,451	$ 44,507
Restricted cash	7,045	8,966	7,045	8,966
Total cash and cash equivalents and restricted cash	$ 54,063	$ 56,417	54,063	56,417
Supplemental disclosure of Cash Flow Information
Cash paid for interest and other finance costs			17,091	6,440
Cash paid for income taxes			5,541	4,017
Non-cash warrant contra revenue			830	763
Non-cash share-based compensation expenses			$ 591	$ 209