Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Operating activities:
Net income (loss)	$ 241	$ (42,058)
Adjustments to reconcile net loss to net cash used for operating activities:
Depreciation, amortization, and impairment	878	1,990
Share-based compensation	1,749	3,667
Amortization of debt issuance costs and discounts	174	157
Interest expense related to the sale of future revenue, net	0	5,683
Other, net	(239)	60
Changes in operating assets and liabilities:
Trade and other receivables, net	(3,177)	1,257
Inventories, net	(1,299)	(2,687)
Prepaid expenses and other assets	1,217	2,111
Accounts payable	48	2,758
Accrued expenses and other liabilities	(3,469)	(2,357)
Deferred revenue	2,439	10,509
Loans payable	0	(675)
Net cash used for operating activities	(1,438)	(18,235)
Investing activities:
Capital expenditures	(979)	(998)
Additions to intangible assets	0	(1,500)
Net cash used for investing activities	(979)	(2,498)
Financing activities:
Proceeds from common stock issued under public equity offering, net	5,274	3,017
Proceeds from common stock issued under private equity offering, net	0	3,805
Proceeds from issuance and exercise of warrants	8,342	5,874
Proceeds from shares issued under employee stock purchase plan	31	15
Repayment of debt principal including lease liabilities	(12,548)	0
Premium paid to retire debt	(1,027)	(1,350)
Payments for taxes on share-based compensation	(11)	(3)
Net cash provided by financing activities	61	11,358
Net (decrease) increase in cash and cash equivalents	(2,356)	(9,375)
Cash and cash equivalents:
Cash and cash equivalents at beginning of period	27,273	28,024
Cash and cash equivalents at end of period	24,917	18,649
Supplemental disclosures of cash flow information:
Cash payments for interest	$ 2,827	$ 4,828