CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities
Net loss	$ (999)	$ (1,465)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	509	466
Gain on investment	(24)
Accretion of interest on contractual payment obligation		19
Amortization of debt issuance costs		68
Stock-based compensation expense	895	758
Impairment of right-of-use operating lease asset		281
Changes in operating assets and liabilities:
Accounts receivable	501	20
Inventories	(541)	977
Prepaid expenses and other assets	417	(223)
Accounts payable	816	(736)
Contractual payment obligation liability		(271)
Deferred revenue	(649)	(401)
Accrued expenses and other liabilities	(959)	96
Net cash used in operating activities	(34)	(411)
Cash flows from investing activities:
Capital expenditures	(510)	(1,131)
Proceeds from investment	24
Net cash used in investing activities	(486)	(1,131)
Cash flows from financing activities:
Borrowings under revolving loan facility, net of issuance costs		3,975
Repayments under revolving loan facility		(1,793)
Taxes paid related to net share settlement of restricted stock units	(399)	(253)
Proceeds from exercise of stock options		34
Net cash provided by (used in) financing activities	(399)	1,963
Effect of exchange rates on cash, cash equivalents, and restricted cash	(200)	(312)
Net increase (decrease) in cash, cash equivalents, and restricted cash	(1,119)	109
Cash, cash equivalents, and restricted cash at beginning of period	29,807	11,409
Cash, cash equivalents, and restricted cash at end of period	28,688	11,518
Supplemental Disclosures of Cash Flow Information:
Interest paid	3	170
Taxes paid, net	$ 32	$ 15