CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Cash flows from operating activities:
Net loss	$ (10,016)	$ (2,048)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	2,223	2,192
Stock-based compensation	646	809
Gain on disposal of equipment	(3)
Equity in income of unconsolidated joint ventures	(248)	(890)
Deferred tax assets	(11)	40
Changes in operating assets and liabilities:
Accounts receivable	2,868	(6,076)
Inventories	5,015	(720)
Prepaid expenses and other current assets	4,534	(375)
Other assets	(3,122)	65
Accounts payable	(1,298)	815
Accrued liabilities	(2,956)	(558)
Other long-term liabilities	(978)	(2,060)
Net cash used in operating activities	(3,346)	(8,806)
Cash flows from investing activities:
Purchases of property, plant and equipment	(510)	(4,392)
Proceeds from sales and maturities of available-for-sale debt securities		480
Investments in non-marketable equity investments	(276)
Net cash used in investing activities	(786)	(3,912)
Cash flows from financing activities:
Proceeds from common stock options exercised		20
Proceeds from short-term bank loans	13,674	12,858
Payments on short-term bank loans	(9,250)	(16,541)
Proceeds from long-term loan	2,755	5,831
Payments on long-term loan	(297)	(168)
Net cash provided by financing activities	6,882	2,000
Effect of exchange rate changes on cash, restricted cash and cash equivalents	1,623	204
Net increase (decrease) in cash, restricted cash and cash equivalents	4,373	(10,514)
Cash, restricted cash and cash equivalents at the beginning of the year	33,811	50,114
Cash, restricted cash and cash equivalents at the end of the period	38,184	39,600
Supplemental disclosure of non-cash flow information:
Notes receivables paid to purchase fixed assets	$ 1,165	1,377
Consideration payable in connection with construction in progress, included in accrued liabilities		$ 21