Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash flows from operating activities:
Net loss	$ (112,753)	$ (41,016)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	1,332	1,241
Noncash lease expense related to operating right-of-use assets	1,748
Amortization of premium on marketable securities	602	0
Unrealized loss on marketable securities	60	0
Change in fair value of warrants	39,721	4,574
Impairment of inventories	1,453	2,481
Loss on extinguishment of debt	0	866
Share-based compensation	16,367	3,413
Other	512	0
Changes in operating assets and liabilities:
Accounts receivable	3,527	(3,940)
Inventories	(2,640)	(3,440)
Prepaid expenses and other current assets	(8,469)	(1,049)
Other non-current assets	(1,490)	638
Accounts payable	854	92
Accrued and other current liabilities	2,652	2,531
Other non-current liabilities	(1,659)	(369)
Net cash used in operating activities	(58,183)	(33,978)
Cash flows from investing activities:
Purchases of marketable securities	(376,289)	0
Proceeds from maturities of marketable securities	169,619	0
Proceeds from sales of marketable securities	36,937	285
Purchases of property and equipment	(2,710)	(708)
Net cash used in investing activities	(172,443)	(423)
Cash flows from financing activities:
Cash received from Gores on settlement of recapitalization of escrow	10	0
Proceeds from the issuance of debt	0	31,910
Repayment of debt	(143)	(3,843)
Principal payments on finance leases (capital lease prior to adoption of ASC 842)	(143)
Principal payments on finance leases (capital lease prior to adoption of ASC 842)		(108)
Proceeds from exercise of warrants	153,927	0
Proceeds from exercise of stock options	2,812	0
Proceeds from issuance of restricted common stock	0	9
Payments of employee taxes related to vested restricted stock units	(140)	0
Repurchase of common stock and redemption of warrants	(2)	(4)
Net cash provided by financing activities	156,321	27,964
Net decrease in cash, cash equivalents and restricted cash	(74,305)	(6,437)
Beginning cash, cash equivalents and restricted cash	209,719	27,305
Ending cash, cash equivalents and restricted cash	135,414	20,868
Supplemental disclosures of cash flow information:
Cash paid for interest	37	1,328
Supplemental disclosures of noncash investing and financing activities:
Issuance of Class A common stock upon exercise of warrants	338,293	0
Operating lease right-of-use assets obtained in exchange for lease obligations	$ 2,876	0
Accounting Standards Update [Extensible List]	Upon adoption of ASC 842
Assets acquired under finance leases (capital lease prior to adoption of ASC 842)	$ 0	123
Purchases of property and equipment recorded in accounts payable and accrued liabilities	222	65
Receivable from stock option exercises	394	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	$ 0