Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Operating Activities:
Net (loss) income	$ (831)	$ 504
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	1,493	1,502
Intangible asset amortization	70	144
Stock-based compensation	1,657	1,563
Loss on disposal of property and equipment	3	7
Restructuring costs	45	(28)
Bad debt provision	(34)	(110)
Changes in operating assets and liabilities:
Accounts receivable	1,260	2,065
Inventories	(1,121)	882
Prepaid expenses and other assets	532	871
Accounts payable	(630)	810
Income taxes payable	(18)	16
Other accrued liabilities	624	(1,167)
Deferred revenue	63	19
Net cash provided by operating activities	3,113	7,078
Investing Activities:
Capital expenditures	(1,266)	(2,418)
Purchase of investments	(16,058)	(26,323)
Redemptions/maturities of short-term investments	26,278	25,781
Cash paid for acquisition, net of cash acquired	(6,277)	0
Net cash provided by (used in) investing activities	2,677	(2,960)
Financing Activities:
Proceeds from issuance of common stock	418	496
Proceeds from Paycheck Protection Program Loan	0	3,500
Repayment of Paycheck Protection Program Loan	0	(3,500)
Payment of withholding tax on stock-based compensation	(782)	(1,106)
Principle payments on finance leases	(35)	(41)
Purchase of common stock from repurchase program	(733)	(2,000)
Cash dividends	(2,018)	(2,054)
Net cash used in financing activities	(3,150)	(4,705)
Net increase (decrease) in cash and cash equivalents	2,640	(587)
Effect of exchange rate changes on cash	24	(49)
Cash and cash equivalents, beginning of period	5,761	7,094
Cash and Cash Equivalents, End of Period	$ 8,425	$ 6,458