Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Statement Of Cash Flows [Abstract]
Net cash flows used in operating activities	$ (7,105)	$ (23,033)
Cash flows used in investing activities:
Purchases of property, plant and equipment	(10,005)	(6,870)
Proceeds from sale of property, plant and equipment	128	7
Purchases of long-term marketable securities	(67)	(487)
Proceeds from sale of long-term marketable securities	384	625
Net cash flows used in investing activities	(9,560)	(6,725)
Cash flows from financing activities:
Proceeds from revolving credit facility	20,154	36,000
Payments on revolving credit facility	(9,128)	(8,034)
Proceeds from sale and leaseback financing arrangements	2,500	0
Payments on sale and leaseback financing arrangements	(132)	(141)
Proceeds from equipment financing facility	4,207	0
Proceeds from related party debt (Note 18)	669	958
Repayments of related party debt (Note 18)	(669)	(913)
Repayments of debt	(197)	(370)
Net cash flows provided by financing activities	17,404	27,500
Effect of exchange rate changes on cash and cash equivalents	1	(707)
Net increase (decrease) in cash and cash equivalents	740	(2,965)
Cash and cash equivalents at beginning of period	8,735	10,337
Cash and cash equivalents at end of period	9,475	7,372
Supplemental information:
Income tax payments, net of refunds	1,478	402
Interest payments	3,580	2,183
Non-cash investing and financing activities:
Purchases of property, plant and equipment in current liabilities	1,899	1,184
Finance lease right-of-use assets exchanged for lease liabilities	0	1,105
Operating lease right-of-use assets exchanged for lease liabilities	$ 394	$ 118