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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Statement of Cash Flows [Abstract]    
Net cash flows (used in) provided by operating activities $ (1,363) $ 10,576
Cash flows used in investing activities:    
Purchases of property, plant and equipment (6,634) (8,443)
Proceeds from government grants, used for purchase of equipment 1,343 1,293
Proceeds from sale of property, plant and equipment 297 10
Purchases of long-term marketable securities (12) (364)
Proceeds from sale of long-term marketable securities 499 847
Net cash flows used in investing activities (4,507) (6,657)
Cash flows provided by financing activities:    
Proceeds from Equipment Term Notes 13,500  
Proceeds from revolving credit facility 27,931 18,396
Payments on revolving credit facility (33,401) (17,172)
Repayment of debt principal (2,556) (1,695)
Proceeds from equipment financing facility   1,692
Repayments of related party debt   (664)
Payment of debt issuance costs (891)  
Proceeds from shareholder exercise of warrants 17  
Net cash flows provided by financing activities 4,600 557
Effect of exchange rate changes on cash and cash equivalents 801 82
Net (decrease) increase in cash and cash equivalents (469) 4,558
Cash and cash equivalents at beginning of period 15,427 7,286
Cash and cash equivalents at end of period 14,958 11,844
Supplemental information:    
Income tax payments (net of refunds) 1,282 2,181
Interest payments (net of amounts capitalized) 7,304 7,663
Non-cash investing and financing activities:    
Purchases of property, plant and equipment in accounts payable 984 516
Finance lease right-of-use assets exchanged for lease liabilities 23 146
Operating lease right-of-use assets exchanged for lease liabilities $ 633 $ 550