Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities
Net loss - before noncontrolling interest (“NCI”)	$ (56,126)	$ (35,888)
Adjustments to reconcile net loss - before NCI to net cash used in operating activities
Depreciation expense	80	23
Amortization expense	146
Stock-based compensation	15,009	2,044
In-process R&D charge	133
Change in fair value - Senior Secured Convertible Notes and Senior Convertible Note	(1,682)	5,327
Debt extinguishment loss - Senior Secured Convertible Notes and Senior Convertible Note	3,715	6,497
Debt forgiveness	(300)
Changes in operating assets and liabilities:
Accounts receivable	(200)
Prepaid expenses and other current assets	(3,458)	(1,336)
Accounts payable	174	501
Accrued expenses and other current liabilities	1,918	918
Net cash flows used in operating activities	(40,591)	(21,914)
Cash flows from investing activities
Purchase of equipment	(1,469)	(55)
Acquisitions, net of cash acquired	(2,247)
Net cash flows used in investing activities	(3,716)	(55)
Cash flows from financing activities
Proceeds - issue of common stock - initial public offering - majority-owned subsidiary common stock	62,000
Payment - offering costs - initial public offering - majority-owned subsidiary common stock	(5,665)
Proceeds – issue of common stock – registered offerings	55,016	16,032
Payment – offering costs – registered offerings	(1,312)	(100)
Proceeds – issue of Senior Secured Convertible Notes		13,300
Proceeds – issue of Senior Convertible Note		3,700
Proceeds – Cares Act Paycheck Protection Program Loan		300
Payment – repayment of Senior Convertible Note and Senior Secured Convertible Note	(14,816)
Payment – Senior Convertible Note and Senior Secured Convertible Note – non-installment payments	(154)	(600)
Proceeds – exercise of Series Z warrants	7,804
Proceeds – exercise of Series W warrants	20
Proceeds – exercise of Series S warrants		12
Proceeds – exercise of stock options	980
Proceeds – issue common stock – Employee Stock Purchase Plan	436	357
Proceeds – exercise of stock options issued under equity incentive plan of majority owned subsidiary		5
Net cash flows provided by financing activities	104,309	33,006
Net increase (decrease) in cash	60,002	11,037
Cash, beginning of period	17,256	6,219
Cash, end of period	$ 77,258	$ 17,256