Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash Flows from Operating Activities
Net income (loss)	$ (31,365)	$ 3,321
Adjustments to reconcile net income (loss) to net cash and cash equivalents from operating activities:
Depreciation and amortization	4,906	1,782
Amortization of right-of-use assets	372	16
Stock compensation expense	5,145	3,910
Deferred taxes		13
Change in fair value of warrant liabilities	(2,325)	(28,183)
Amortization of premiums and accretion of discounts on marketable securities	(5,518)
Change in operating assets and liabilities that provided (used) cash and cash equivalents:
Contract receivable	(3,383)	(1,202)
Prepaid expenses and other assets	(188)	744
Accounts payable and other accrued liabilities	(297)	(4,261)
Deferred revenue	(4,032)	(286)
Accrued expenses	649	1,000
Lease liabilities	(268)	188
Net cash and cash equivalents used in operating activities	(36,304)	(22,958)
Cash Flows from Investing Activities
Purchases of property, plant and equipment	(21,184)	(30,957)
Purchases of marketable securities and long-term investments	(174,400)	(212,792)
Proceeds from sales of marketable securities	210,329	54,819
Purchases of intangible assets	(259)	(228)
Net cash and cash equivalents provided by (used in) investing activities	14,486	(189,158)
Cash Flows from Financing Activities
Payments of debt	(7)	(71)
Proceeds from exercise of stock options	184	354
Proceeds from issuance of common stock under ESPP	214	0
Receivable for exercise of stock options		79
Cash paid for withholding of employee taxes related to stock-based compensation	(111)	(58)
Payments on finance lease liability	(146)	(20)
Transaction costs		(12)
Net cash and cash equivalents provided by financing activities	134	272
Net (decrease) in cash and cash equivalents	(21,684)	(211,844)
Cash and cash equivalents at beginning of period	50,123	513,447
Cash and cash equivalents at end of period	28,439	301,603
Supplemental information
Cash paid for interest	26	5
Accrued capital expenditures	$ 3,591	$ 8,146