UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash flows from operating activities
Net loss	$ (24,825)	$ (29,571)
Adjustments to reconcile net loss to net cash used in operating activities:
Loss/ (gain) on disposal of property, plant and equipment	(34)	824
Depreciation of property, plant and equipment	7,470	4,892
Amortization of land use right and intangible assets	194	205
Noncash lease expenses	664	658
Share-based compensation	11,865	17,929
Changes in fair value of warrant liability	(42)	(17)
(Reversal)/ allowance of credit losses	578	(1,094)
Product warranty	3,269	2,530
Changes in operating assets and liabilities:
Notes receivable	10,577	(21,340)
Accounts receivable	12,011	32,293
Inventories	16,341	(7,039)
Prepaid expenses and other current assets	4,305	(857)
Operating lease right-of-use assets	(323)	(2,493)
Other non-current assets	(275)	288
Notes payable	1,042	(936)
Accounts payable	(27,843)	(3,956)
Advance from customers	(1,694)	(1,179)
Accrued expenses and other liabilities	(10,623)	(3,434)
Operating lease liabilities	(500)	1,239
Other non-current liabilities	(126)	(108)
Net cash (used in) generated from operating activities	2,031	(11,166)
Cash flows from investing activities
Purchases of property, plant and equipment	(10,241)	(35,922)
Purchase of short-term investments	0	(243)
Proceeds on disposal of property, plant and equipment	152	340
Proceeds from maturity of short-term investments	5,564	0
Net cash used in investing activities	(4,525)	(35,825)
Cash flows from financing activities
Proceeds from borrowings	18,780	4,384
Repayment of bank borrowings	(12,520)	0
Net cash generated from financing activities	6,260	4,384
Effect of exchange rate changes	(5,251)	470
Decrease in cash, cash equivalents and restricted cash	(1,485)	(42,137)
Cash, cash equivalents and restricted cash at beginning of the period	88,189	302,617
Cash, cash equivalents and restricted cash at end of the period	86,704	260,480
Cash and cash equivalents	39,451	200,305
Restricted cash	47,253	60,175
Total cash, cash equivalents and restricted cash	86,704	260,480
Non-cash investing and financing activities
Payable for purchase of property, plant and equipment	$ 92,817	$ 58,121