Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Statement of Cash Flows [Abstract]
Net cash flows used in operating activities	$ (10,327)	$ (20,405)
Cash flows used in investing activities:
Purchases of property, plant and equipment	(14,134)	(13,003)
Proceeds from sale of property, plant and equipment	128	3
Purchases of long-term marketable securities	(70)	(496)
Proceeds from sale of long-term marketable securities	561	980
Net cash flows used in investing activities	(13,515)	(12,516)
Cash flows from financing activities:
Proceeds from revolving credit facility	28,205	43,000
Payments on revolving credit facility	(15,693)	(27,283)
Proceeds from sale and leaseback financing arrangements	2,500	15,500
Payments on sale and leaseback financing arrangements	(180)	(264)
Proceeds from equipment financing facility	6,822	4,014
Proceeds from related party debt (Note 18)	1,099	5,776
Repayments of related party debt (Note 18)	(1,096)	(4,251)
Repayments of debt	(334)	(480)
Debt issuance costs	0	(104)
Net cash flows provided by financing activities	21,323	35,908
Effect of exchange rate changes on cash and cash equivalents	(146)	(1,134)
Net (decrease) increase in cash and cash equivalents	(2,665)	1,853
Cash and cash equivalents at beginning of period	8,735	10,337
Cash and cash equivalents at end of period	6,070	12,190
Supplemental information:
Income tax payments, net of refunds	1,787	959
Interest payments	5,739	3,896
Non-cash investing and financing activities:
Purchases of property, plant and equipment in current liabilities	2,365	1,009
Finance lease right-of-use assets exchanged for lease liabilities	144	1,105
Operating lease right-of-use assets exchanged for lease liabilities	$ 1,953	$ 191