Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities:
Net loss	$ (183,572)	$ (112,753)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	2,544	1,332
Noncash lease expense related to operating lease right-of-use assets	2,139	1,748
Amortization of premium on marketable securities	919	602
Change in fair value of warrants	(7,876)	39,721
Vendor stock-in-lieu of cash program	19,916	0
Amortization of debt discount and issuance costs	1,618	0
Impairment of inventories	4,778	1,453
Share-based compensation	65,323	16,367
Product warranty and other	171	572
Changes in operating assets and liabilities:
Accounts receivable	7,038	3,527
Inventories	(2,814)	(2,640)
Prepaid expenses and other current assets	(2,417)	(8,469)
Other non-current assets	(532)	(1,490)
Accounts payable	7,392	854
Accrued and other current liabilities	1,106	2,652
Other non-current liabilities	(931)	(1,659)
Net cash used in operating activities	(85,198)	(58,183)
Cash flows from investing activities:
Purchases of marketable securities	(270,440)	(376,289)
Proceeds from maturities of marketable securities	147,053	169,619
Proceeds from sales of marketable securities	50,315	36,937
Purchases of property and equipment	(7,491)	(2,710)
Advances for capital projects and equipment	(1,673)	0
Net cash used in investing activities	(86,996)	(172,443)
Cash flows from financing activities:
Proceeds from exercise of warrants	0	153,927
Proceeds from exercise of stock options	1,791	2,812
Payments of employee taxes related to stock-based awards	(1,724)	(140)
Repurchase of common stock and redemption of warrants	(80,878)	(2)
Other financing activities	0	(276)
Net cash provided by (used in) financing activities	(80,811)	156,321
Net decrease in cash, cash equivalents and restricted cash	(253,005)	(74,305)
Beginning cash, cash equivalents and restricted cash	330,702	209,719
Ending cash, cash equivalents and restricted cash	77,697	135,414
Supplemental disclosures of cash flow information:
Cash paid for interest	3,863	37
Supplemental disclosures of noncash investing and financing activities:
Issuance of Class A common stock upon exercise of warrants	19,003	338,293
Operating lease right-of-use assets obtained in exchange for lease obligations	9,993	2,876
Purchases of property and equipment recorded in accounts payable and accrued liabilities	2,630	222
Vendor stock-in-lieu of cash program—advances for capital projects and equipment	10,293	0
Receivable from stock option exercises	0	394
Freedom Photonics
Cash flows from investing activities:
Acquisitions	(2,759)	0
Solfice
Cash flows from investing activities:
Acquisitions	$ (2,001)	0
Upon adoption of ASC 842
Supplemental disclosures of noncash investing and financing activities:
Operating lease right-of-use assets obtained in exchange for lease obligations		$ 10,849