CONSOLIDATED STATEMENTS OF CASH FLOWS $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Operating Activities
Net loss	$ (66,215)	$ (98,007)
Adjustments to reconcile net loss to net cash used in operating activities:
Impairment loss	0	24,749
Loss on disposal of assets		499
Stock-based compensation	17,087	17,419
Depreciation and amortization	19,007	7,887
Amortization of marketable securities (discount) premium	(102)	2,723
Other noncash expense (income)	908	877
Changes in operating assets and liabilities:
Accounts receivable	(2,147)	502
Inventories	670	(2,004)
Prepaid expenses and other current assets, deposits and other assets	(25,620)	(2,591)
Accounts payable, accrued expenses and non-current liabilities	2,693	3,635
Net cash used in operating activities	(53,719)	(44,311)
Investing Activities
Acquisitions of property, plant and equipment	(54,455)	(84,077)
Acquisition of patent portfolio		(10)
Proceeds from maturity of marketable securities	168,550	299,581
Purchase of marketable securities		(130,402)
Proceeds from sale of property, plant and equipment	34
Net cash provided by investing activities	114,129	85,092
Financing Activities
Debt and equity offering costs		(10,993)
Proceeds from issuance of common stock and common stock warrants		150,000
Proceeds from exercise of warrants		3
Net settlement of common stock under stock plans		(286)
Payment of loans payable	(167)	(150)
Payment of finance lease liabilities	(22)	(12)
Net cash (used in) provided by financing activities	(189)	138,562
Net increase in cash and cash equivalents	60,221	179,343
Cash, cash equivalents and restricted cash at beginning of period	315,376	136,033
Cash, cash equivalents and restricted cash at end of period	375,597	315,376
Schedule of cash, cash equivalents and restricted cash
Cash and cash equivalents	298,349	237,125
Restricted cash (current)	77,248	1,032
Restricted cash (non-current)		77,219
Total cash, cash equivalents and restricted cash	375,597	315,376
Supplemental disclosures of cash and non-cash investing and financing transactions
Cash paid for interest, net of amounts capitalized	1,029	522
Non-cash purchase of property, plant and equipment	8,174	13,837
Right-of-use asset purchased with operating lease	$ 199	$ 0