Consolidated Statements of Cash Flow (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss	$ (22,643)	$ (28,045)
Adjustments to reconcile net loss to net cash used in operating activities:
Inventory reserve	312	0
Depreciation and amortization	60	56
Stock-based compensation	2,138	1,131
Amortization of right of use assets	45	29
Amortization of debt discounts and issuance costs	0	3
Change in fair value of warrant liability	(10,059)	17,963
Loss on disposal of property and equipment	0	157
Changes in operating assets and liabilities
Accounts receivable	145	0
Inventory	(1,737)	(1,119)
Prepaid expenses and other assets	(384)	(138)
Accounts payable and accrued liabilities	(2,389)	1,520
Accrued bonuses	(434)	(669)
Accrued interest	0	(598)
Other current and long-term liabilities	(46)	(49)
Net cash used in operating activities	(34,992)	(9,759)
CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds from disposal of property and equipment	0	45
Net cash provided by investing activities	0	45
CASH FLOWS FROM FINANCING ACTIVITIES
Net proceeds from issuance of common stock	1,330	66,882
Proceeds from exercise of warrants	0	1,178
Repayments of long-term debt	0	(625)
Net cash provided by financing activities	1,330	67,435
NET INCREASE IN CASH AND CASH EQUIVALENTS	(33,662)	57,721
Cash and cash equivalents, beginning of period	69,392	22,449
Cash and cash equivalents, end of period	35,730	80,170
SUPPLEMENTAL INFORMATION
Income taxes	0	0
Interest	0	6
NON-CASH INVESTING AND FINANCING TRANSACTIONS
Cashless exercise of warrants	0	1,533
Preferred stock conversion feature and dividends	$ 0	$ 8,085