Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Cash flows from operating activities
Net loss	$ (4,917)	$ (4,619)	$ (14,138)	$ (7,361)
Adjustments to reconcile net loss to cash used in operating activities:
Depreciation			298	80
Non-cash lease (expense)			90	111
Share-based compensation			7,906	6,753
Gain on debt extinguishment				(2,183)
Non-cash interest				24
Changes in operating assets and liabilities:
Accounts receivable			329	(1,558)
Inventories			(3,280)	(559)
Prepaid expenses and other current assets			1,071	(668)
Compensating cash arrangement				(1)
Other assets			45	55
Accounts payable			687	1,492
Accrued liabilities			(19)	(647)
Deferred revenue			1,199	2,650
Other liabilities			(51)	85
Net cash used in operating activities			(5,863)	(1,727)
Cash flows from investing activities
Purchase of property and equipment			(2,009)	(201)
Net cash used in investing activities			(2,009)	(201)
Cash flows from financing activities
Proceeds from issuance of stock, net of issuance costs			159	536
Net cash provided by financing activities			159	536
Net decrease in cash, cash equivalents, and restricted cash			(7,713)	(1,392)
Cash, cash equivalents, and restricted cash at beginning of period			40,144	43,940
Cash, cash equivalents, and restricted cash at end of period	32,431	42,548	32,431	42,548
Supplemental disclosure of cash flow information:
Purchase of property and equipment included in accounts payable			163	830
Reconciliation of cash, cash equivalents, and restricted cash to balance sheet as of September 30th:
Cash and cash equivalents	30,938	40,243	30,938	40,243
Restricted cash - current	618	1,605	618	1,605
Restricted cash	875	700	875	700
Total cash, cash equivalents, and restricted cash	$ 32,431	$ 42,548	$ 32,431	$ 42,548