Consolidated Statement of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Operating activities
Net income (loss)	$ 2,628	$ 8,120	$ 2,914	$ (1,735)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization			14,558	13,470
Profit on sale of property, plant and equipment			(152)	(73)
Provision for doubtful accounts			(136)	32
Amortization of debt issuance costs (including loss on extinguishment of debt)			286	11,302
Amortization of call option premium			720	480
Warrant contra revenue	(0)	405	(0)	830
Share-based compensation expense			833	591
Deferred income taxes			(1,157)	(1,255)
Share of income of equity-accounted investees	(3,833)	(59)	(3,825)	(45)
Changes in operating assets and liabilities:
Trade accounts receivables			19,544	(11,412)
Prepaid expenses and other assets			(25,539)	(2,971)
Trade accounts payable			(712)	(9,965)
Income taxes, net			(1,046)	2,724
Accrued expenses and other liabilities			2,418	9,505
Net cash provided by operating activities			8,706	11,478
Investing activities
Purchase of property, plant and equipment, net			(6,191)	(7,513)
Investment in equity-accounted investees			0	(25,000)
Payments for call option premium			0	(3,000)
Proceeds from equity-accounted investees			0	104
Net cash used in investing activities			(6,191)	(35,409)
Financing activities
Proceeds from the issuance of common stock			246	1,283
Proceeds from long term debt (net of debt issuance cost paid to lenders)			0	156,525
Payments of long term debt			0	(117,600)
Payments for loan fees related to long term debt			0	(2,794)
Proceeds from a line of credit, net			1,423	0
Payments of other borrowings, net			(969)	(9,431)
Common stock repurchases			(1,334)	0
Net cash (used in)/ provided by financing activities			(634)	27,983
Net increase in cash and cash equivalents			1,881	4,052
Effect of exchange rate changes on cash and cash equivalents and restricted cash			(1,486)	(548)
Cash and cash equivalents and restricted cash at beginning of period			55,396	50,559	$ 50,559
Cash and cash equivalents and restricted cash at end of period	55,791	54,063	55,791	54,063	55,396
Components of cash and cash equivalents and restricted cash
Balances with banks	47,145	47,018	47,145	47,018	$ 47,940
Restricted cash	8,646	7,045	8,646	7,045
Total cash and cash equivalents and restricted cash	$ 55,791	$ 54,063	55,791	54,063
Non-cash warrant contra revenue			0	830
Non-cash share-based compensation expenses			833	591
Supplemental disclosure of cash flow information
Cash paid for interest and other finance cost			4,700	17,091
Cash paid for income taxes			$ 5,573	$ 5,541