Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Operating activities:
Net income (loss)	$ 2,276	$ (29,522)
Adjustments to reconcile net loss to net cash used for operating activities:
Depreciation, amortization, and impairment	614	1,394
Share-based compensation	975	3,132
Amortization of debt issuance costs and discounts	115	109
Interest expense related to the sale of future revenue, net	0	3,722
Other, net	(267)	(161)
Changes in operating assets and liabilities:
Trade and other receivables, net	(4,728)	(6,949)
Inventories, net	(170)	(970)
Prepaid expenses and other assets	1,812	2,446
Accounts payable	743	574
Accrued expenses and other liabilities	(4,643)	(2,021)
Deferred revenue	4,182	7,202
Net cash provided by (used for) operating activities	909	(21,044)
Investing activities:
Capital expenditures	(828)	(781)
Net cash used for investing activities	(828)	(781)
Financing activities:
Proceeds from common stock issued under public equity offering, net	5,090	2,473
Proceeds from common stock issued under private equity offering, net	0	3,805
Proceeds from issuance and exercise of warrants	3,542	5,878
Proceeds from shares issued under employee stock purchase plan	31	15
Repayment of debt principal including lease liabilities	(12,543)	0
Premium paid to retire debt	(1,027)	(675)
Payments for taxes on share-based compensation	(11)	0
Net cash (used for) provided by financing activities	(4,918)	11,496
Net (decrease) increase in cash and cash equivalents	(4,837)	(10,329)
Cash and cash equivalents:
Cash and cash equivalents at beginning of period	27,273	28,024
Cash and cash equivalents at end of period	22,436	17,695
Supplemental disclosures of cash flow information:
Cash payments for interest	$ 2,820	$ 3,219