Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Operating Activities:
Net income	$ 1,546	$ 1,952
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	2,260	2,152
Intangible asset amortization	144	670
Stock-based compensation	1,996	3,246
Loss on disposal of property and equipment	7	91
Restructuring costs	(40)	268
Bad debt provision	(164)	(3)
Changes in operating assets and liabilities:
Accounts receivable	3,599	(1,276)
Inventories	1,691	(838)
Prepaid expenses and other assets	1,058	902
Accounts payable	(1,210)	(1,019)
Income taxes payable	(12)	(40)
Other accrued liabilities	(269)	1,485
Deferred revenue	13	5
Net cash provided by operating activities	10,619	7,595
Investing Activities:
Capital expenditures	(3,373)	(1,366)
Purchases of investments	(40,038)	(38,393)
Redemptions/maturities of short-term investments	35,756	36,844
Net cash used in investing activities	(7,655)	(2,915)
Financing Activities:
Proceeds from issuance of common stock	504	730
Proceeds from Paycheck Protection Program Loan	3,500	0
Repayment of Paycheck Protection Program Loan	(3,500)	0
Payment of withholding tax on stock-based compensation	(1,108)	(754)
Principle payments on finance leases	(59)	(79)
Purchase of common stock from repurchase program	(2,000)	0
Cash dividends	(3,079)	(3,046)
Net cash used in financing activities	(5,742)	(3,149)
Net (decrease) increase in cash and cash equivalents	(2,778)	1,531
Effect of exchange rate changes on cash	113	(213)
Cash and cash equivalents, beginning of period	7,094	4,329
Cash and Cash Equivalents, End of Period	$ 4,429	$ 5,647