CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Operating Activities
Net loss	$ (32,038)	$ (28,834)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation	8,620	7,945
Depreciation and amortization	9,329	2,916
Amortization of marketable securities (discount) premium	(102)	2,637
Other noncash expense	351	352
Changes in operating assets and liabilities:
Accounts receivable	(535)	790
Inventories	1,136	102
Prepaid expenses and other current assets, deposits and other assets	(13,035)	(2,156)
Accounts payable, accrued expenses and non-current liabilities	(3,105)	(953)
Net cash used in operating activities	(29,379)	(17,201)
Investing Activities
Acquisitions of property, plant and equipment	(29,138)	(46,165)
Acquisition of patent portfolio	0	(10)
Proceeds from maturity of marketable securities	168,550	169,082
Purchase of marketable securities	0	(131,257)
Proceeds from property, plant and equipment	112	0
Net cash provided by (used in) investing activities	139,524	(8,350)
Financing Activities
Debt and equity offering costs	0	(10,993)
Proceeds from issuance of common stock and common stock warrants	0	150,000
Proceeds from exercise of warrants	0	3
Net settlement of common stock under stock plans	0	(286)
Payment of loans payable	(80)	(72)
Payment of finance lease liabilities	(22)	0
Net cash (used in) provided by financing activities	(102)	138,652
Net increase in cash and cash equivalents	110,043	113,101
Cash, cash equivalents and restricted cash at beginning of period	315,376	136,033
Cash, cash equivalents and restricted cash at end of period	425,419	249,134
Schedule of cash, cash equivalents and restricted cash
Cash and cash equivalents	347,650	172,984
Restricted cash	71,201	5,894
Restricted cash (non-current)	6,568	70,256
Total cash, cash equivalents and restricted cash	425,419	249,134
Supplemental disclosures of cash and non-cash investing and financing transactions
Cash paid for interest, net of amounts capitalized	1,027	5
Non-cash interest capitalized to construction in progress		511
Non-cash purchase of property, plant and equipment	$ 12,929	$ 11,643