Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Statement Of Cash Flows [Abstract]
Net cash flows used in operating activities	$ (23,033)	$ (2,754)
Cash flows from investing activities:
Purchases of property, plant and equipment	(6,870)	(6,714)
Proceeds from sale of property, plant and equipment	7	38
Purchases of long-term marketable securities	(487)	(18)
Proceeds from sale of long-term marketable securities	625	158
Net cash flows used in investing activities	(6,725)	(6,536)
Cash flows from financing activities:
Repayments of debt	(511)	(1,021)
Proceeds from revolving credit facility	36,000	12,131
Payments on revolving credit facility	(8,034)	(8,000)
Proceeds from related party debt (Note 17)	958	0
Repayments of related party debt (Note 17)	(913)	0
Proceeds from shareholder exercise of warrants (Note 9)	0	3,217
Debt issuance costs	0	(485)
Net cash flows provided by financing activities	27,500	5,842
Effect of exchange rate changes on cash and cash equivalents	(707)	(81)
Net decrease in cash and cash equivalents	(2,965)	(3,529)
Cash and cash equivalents at beginning of period	10,337	16,842
Cash and cash equivalents at end of period	7,372	13,313
Supplemental information:
Income tax payments	402	1,023
Interest payments	2,183	1,203
Non-cash investing and financing activities:
Purchases of property, plant and equipment in current liabilities	1,184	546
Finance lease right-of-use assets exchanged for lease liabilities	1,105	113
Operating lease right-of-use assets exchanged for lease liabilities	$ 118	$ 53