Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Cash flows from operating activities
Net loss	$ (34,407)	$ (36,387)
Adjustments to reconcile net loss to net cash used in operating activities:
Non-cash other income (expense), net	(3)	77
Non-cash interest income	(7)
Non-cash interest expense	215	310
Depreciation and amortization expense	192	270
Amortization of right-of-use assets		281
Stock-based compensation	1,832	2,517
Other, net	34	14
Changes in operating assets and liabilities:
(Increase) decrease in other non-current assets	3	(10)
(Increase) decrease in accounts receivable, net and other receivables and prepaid expenses	2,444	(10,852)
Increase in inventory	(2,824)	(9,758)
Decrease in accounts payable	(443)	(1,301)
Increase (decrease) in accrued expenses and other liabilities	(1,920)	1,980
Decrease in deferred revenue	(374)	(375)
Increase (decrease) in other non-current liabilities	30	(205)
Increase in income tax liabilities	142
Net cash used in operating activities	(35,086)	(53,439)
Cash flows from investing activities
Purchases of equipment and intangible assets	(202)	(17)
Changes in restricted cash	(54)	(52)
Net cash used in investing activities	(256)	(69)
Cash flows from financing activities
Proceeds from issuance of common stock and warrants	2,123	25,462
Proceeds from at-the-market facility	3,080	42,280
Repayments of warrants	(406)
Repayments of long-term borrowings	(1,923)
Equity transaction costs	(364)	(3,514)
Net cash provided by financing activities	2,510	64,228
Effects of exchange rate changes on the balance of cash held in foreign currencies	(234)	(136)
Net increase/(decrease) in cash, cash equivalents and restricted cash	(33,066)	10,584
Cash, cash equivalents, and restricted cash at beginning of period	47,834	41,590
Cash, cash equivalents and restricted cash at end of period	14,768	52,174
Supplemental disclosure of cash flow information:
Interest paid	247	409
Taxes paid	1,008
Equity transaction costs included in accounts payable and accrued expenses	$ 639	$ 923