Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement Of Cash Flows [Abstract]
Net cash flows (used in) provided by operating activities	$ (16,272)	$ 1,858
Cash flows from investing activities:
Purchases of property, plant and equipment	(3,407)	(2,378)
Proceeds from sale of property, plant and equipment	3	0
Purchases of long-term marketable securities	(58)	(1)
Proceeds from sale of long-term marketable securities	132	76
Net cash flows used in investing activities	(3,330)	(2,303)
Cash flows from financing activities:
Repayments of debt	(260)	(192)
Proceeds from revolving credit facility	17,000	3,571
Payments on revolving credit facility	(1,257)	(4,000)
Proceeds from related party debt (Note 17)	745	0
Repayments of related party debt (Note 17)	0	(308)
Proceeds from shareholder exercise of warrants (Note 9)	0	3,101
Net cash flows provided by financing activities	16,228	2,172
Effect of exchange rate changes on cash and cash equivalents	(178)	(318)
Net (decrease) increase in cash and cash equivalents	(3,552)	1,409
Cash and cash equivalents at beginning of period	10,337	16,842
Cash and cash equivalents at end of period	6,785	18,251
Supplemental information:
Income tax payments	227	274
Interest payments	710	607
Non-cash investing and financing activities:
Purchases of property, plant and equipment in current liabilities	1,214	665
Finance lease right-of-use assets exchanged for lease liabilities	590	0
Operating lease right-of-use assets exchanged for lease liabilities	$ 0	$ 53