CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities:
Net loss	$ (1,465)	$ (2,047)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	466	847
Accretion of interest on contractual payment obligation	19	32
Amortization of debt issuance costs	68	24
Stock-based compensation expense	758	640
Impairment of right-of-use operating lease asset	281
Changes in operating assets and liabilities:
Accounts receivable	20	(1,671)
Inventories	977	208
Prepaid expenses and other assets	(223)	(170)
Accounts payable	(736)	(324)
Contractual payment obligation liability	(271)	(319)
Deferred revenue	(401)	(547)
Accrued expenses and other liabilities	96	(382)
Net cash used in operating activities	(411)	(3,709)
Cash flows from investing activities:
Capital expenditures	(1,131)	(137)
Net cash used in investing activities	(1,131)	(137)
Cash flows from financing activities:
Taxes paid related to net share settlement of restricted stock units	(253)	(225)
Proceeds from exercise of stock options	34
Net cash provided by financing activities	1,963	3,412
Effect of exchange rates on cash and cash equivalents	(312)	(253)
Net increase (decrease) in cash and cash equivalents	109	(687)
Cash and cash equivalents at beginning of period	11,409	9,383
Cash and cash equivalents at end of period	11,518	8,696
Supplemental Disclosures of Cash Flow Information:
Interest paid	170	228
Taxes paid, net	15	39
Revolving Loan Facility
Cash flows from financing activities:
Borrowings under revolving loan facility, net of issuance costs	3,975	4,346
Repayments under revolving loan facility and East West Bank term loan, net of issuance costs	$ (1,793)	(209)
East West Bank Term Loan
Cash flows from financing activities:
Repayments under revolving loan facility and East West Bank term loan, net of issuance costs		$ (500)