Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Statement of Cash Flows [Abstract]
Net cash flows used in operating activities	$ (780)	$ (7,105)
Cash flows used in investing activities:
Purchases of property, plant and equipment	(5,510)	(10,005)
Proceeds from government grants, used for purchase of equipment	808
Proceeds from sale of property, plant and equipment	10	128
Purchases of long-term marketable securities	(210)	(67)
Proceeds from sale of long-term marketable securities	532	384
Net cash flows used in investing activities	(4,370)	(9,560)
Cash flows from financing activities:
Proceeds from revolving credit facility	16,172	20,154
Payments on revolving credit facility	(10,276)	(9,128)
Proceeds from sale and leaseback financing arrangements		2,500
Payments on sale and leaseback financing arrangements	(174)	(132)
Proceeds from equipment financing facility	1,692	4,207
Proceeds from related party debt		669
Repayments of related party debt	(664)	(669)
Repayments of debt	(828)	(197)
Net cash flows provided by financing activities	5,922	17,404
Effect of exchange rate changes on cash and cash equivalents	(166)	1
Net increase in cash and cash equivalents	606	740
Cash and cash equivalents at beginning of period	7,286	8,735
Cash and cash equivalents at end of period	7,892	9,475
Supplemental information:
Income tax payments (net of refunds)	1,610	1,478
Interest payments (net of amounts capitalized)	5,024	3,580
Non-cash investing and financing activities:
Purchases of property, plant and equipment in current liabilities	1,306	1,899
Finance lease right-of-use assets exchanged for lease liabilities	146
Operating lease right-of-use assets exchanged for lease liabilities	$ 283	$ 394