Condensed Consolidated Statements of Cash Flows - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
OPERATING ACTIVITIES:
Net loss	$ (24,331,000)	$ (24,030,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	1,000,000	268,000
Amortization of right-of-use assets	383,000	355,000
Amortization of debt discounts and issuance costs	1,798,000	0
Amortization of insurance premiums	1,218,000	0
Inventory reserves	(471,000)	1,064,000
Impairment of assets held for sale	1,039,000	0
Change in fair value of derivative instruments	97,000	435,000
Change in fair value of earn-out shares liability	52,000	(2,624,000)
Net realized losses on marketable debt securities, available-for-sale	91,000	6,000
Stock-based compensation expense	2,012,000	1,391,000
Other non-cash items	(475,000)	732,000
Changes in operating assets and liabilities:
Accounts receivable	1,268,000	(3,495,000)
Inventories	1,064,000	(7,910,000)
Prepaid expenses and other current assets	(1,791,000)	1,914,000
Other assets	(222,000)	0
Accounts payable	635,000	(2,620,000)
Other liabilities	1,307,000	3,210,000
Net cash used in operating activities	(15,326,000)	(31,304,000)
INVESTING ACTIVITIES:
Purchase of property and equipment	(253,000)	(2,998,000)
Proceeds from sales and maturities of marketable debt securities, available-for-sale	23,065,000	30,151,000
Net cash provided by investing activities	22,812,000	27,153,000
FINANCING ACTIVITIES:
Principal payment of equipment leases	(600,000)	(83,000)
Proceeds from short-term insurance financing note	2,187,000	0
Payment for short-term insurance financing note	(1,427,000)	0
Payments of convertible notes and prepayment premiums	(9,450,000)	0
Taxes paid related to net share settlement of stock-based awards	(382,000)	(98,000)
Net cash used in financing activities	(9,672,000)	(181,000)
Net decrease in cash, cash equivalents and restricted cash	(2,186,000)	(4,332,000)
Cash, cash equivalents and restricted cash, beginning of period	38,675,000	19,176,000
Cash, cash equivalents and restricted cash, end of period	36,489,000	14,844,000
Reconciliation of Cash, Cash Equivalents and Restricted Cash to Condensed Consolidated Balance Sheets:
Cash and cash equivalents	36,489,000	11,810,000
Restricted cash	0	3,034,000
Total cash, cash equivalents and restricted cash	36,489,000	14,844,000
Supplemental disclosure of cash flow information
Cash paid for interest	980,000	0
Supplemental disclosure of non-cash investing and financing activities
Purchase of property and equipment in accounts payable	2,000	97,000
Recognition of right-of-use asset and lease liabilities upon ASC 842 adoption on 1/1/2022	0	7,682,000
ROU assets obtained in exchange for operating lease obligations	$ 0	$ 437,000