Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Statement of Cash Flows [Abstract]
Net cash flows provided by (used in) operating activities	$ 10,576	$ (10,327)
Cash flows used in investing activities:
Purchases of property, plant and equipment	(8,443)	(14,134)
Proceeds from government grants, used for purchase of equipment	1,293
Proceeds from sale of property, plant and equipment	10	128
Purchases of long-term marketable securities	(364)	(70)
Proceeds from sale of long-term marketable securities	847	561
Net cash flows used in investing activities	(6,657)	(13,515)
Cash flows from financing activities:
Proceeds from revolving credit facility	18,396	28,205
Payments on revolving credit facility	(17,172)	(15,693)
Proceeds from sale and leaseback financing arrangements		2,500
Payments on sale and leaseback financing arrangements	(263)	(180)
Proceeds from equipment financing facility	1,692	6,822
Payments on equipment financing facility	(1,120)
Proceeds from related party debt		1,099
Repayments of related party debt	(664)	(1,096)
Repayments of debt	(312)	(334)
Net cash flows provided by financing activities	557	21,323
Effect of exchange rate changes on cash and cash equivalents	82	(146)
Net increase (decrease) in cash and cash equivalents	4,558	(2,665)
Cash and cash equivalents at beginning of period	7,286	8,735
Cash and cash equivalents at end of period	11,844	6,070
Supplemental information:
Income tax payments (net of refunds)	2,181	1,787
Interest payments (net of amounts capitalized)	7,663	5,739
Non-cash investing and financing activities:
Purchases of property, plant and equipment in current liabilities	516	2,365
Finance lease right-of-use assets exchanged for lease liabilities	146	144
Operating lease right-of-use assets exchanged for lease liabilities	$ 550	$ 1,953