Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Adjustments to reconcile net loss to net cash used in operating activities:
Net loss	$ (66,421)	$ (18,667)
Depreciation and amortization	657	665
Amortization of investment premiums and discounts	1,318	0
Noncash lease expense	720	722
Paid-in-kind interest on convertible notes payable	0	1,081
Amortization of debt discount	0	4,237
Share-based compensation	3,972	165
Change in fair value of convertible notes payable derivative liabilities	0	1,358
Changes in operating assets and liabilities:
Accounts receivable	(267)	130
Prepaid expenses and other assets	3,646	(668)
Accounts payable	5,617	353
Accrued expenses and other current liabilities	1,309	391
Operating lease liabilities	(373)	(752)
Net cash used in operating activities	(49,822)	(10,985)
Cash Flows from Investing Activities:
Payments to Acquire Property, Plant, and Equipment	(2,213)	(105)
Proceeds from Sale of Property, Plant, and Equipment	0	22
Payments For Security Deposits	(29)	0
Payments to Acquire Other Investments	(268,714)	0
Proceeds from Sale of Other Investments	205,355	0
Net cash used in investing activities	(65,601)	(83)
Cash Flows from Financing Activities:
Proceeds from exercise of stock warrants, net of issuance costs	16,257	0
Proceeds from term loan	0	10,100
(Payments for)/proceeds from Paycheck Protection Program loan	(908)	908
Proceeds from exercise of common stock options	553	119
Proceeds from convertible notes payable issuance and derivative liabilities	0	3,200
Payments for deferred transaction costs	0	(1,316)
Payments for deferred financing costs	0	(468)
Repayments on finance lease obligations	0	(195)
Net cash provided by financing activities	15,902	12,348
Net (decrease) increase in cash and cash equivalents and restricted cash	(99,521)	1,280
Cash and cash equivalents - beginning of the period	389,705	6,285
Cash and cash equivalents and restricted cash - end of the period	290,184	7,565
Supplemental disclosures of noncash financing information:
Acquisitions of property and equipment included in accounts payable	20	0
Deferred transaction costs included in accounts payable	$ 0	$ (2,990)