Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating activities:
Net loss	$ (13,220)	$ (14,672)
Adjustments to reconcile net loss to net cash used for operating activities:
Depreciation, amortization, and impairment	727	755
Share-based compensation	913	1,507
Amortization of debt issuance costs and discounts	40	1,184
Interest expense related to the sale of future revenue, net	1,836	3,302
Other, net	(100)	167
Changes in operating assets and liabilities:
Trade and other receivables, net	(7,678)	(3,374)
Inventories, net	(591)	(338)
Prepaid expenses and other assets	(230)	(535)
Accounts payable	182	(402)
Accrued expenses and other liabilities	(3,963)	(2,501)
Deferred revenue	7,602	810
Net cash used for operating activities	(14,482)	(14,097)
Investing activities:
Capital expenditures	(104)	(103)
Net cash used for investing activities	(104)	(103)
Financing activities:
Proceeds from issuance of common stock, net	1,298	9,891
Net cash provided by financing activities	1,298	9,891
Net decrease in cash and cash equivalents	(13,288)	(4,309)
Cash and cash equivalents at beginning of period	28,024	31,807
Cash and cash equivalents at end of period	14,736	27,498
Supplemental disclosures of cash flow information:
Cash payments for interest	$ 1,609	$ 1,610