CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Net income	$ 516	$ 5,426	$ 3,211
Adjustments to reconcile net income to net cash provided by operating activities:
Share-based compensation expense	692	629	609
Depreciation and amortization	1,371	997	1,081
Deferred income tax (benefit) provision	(294)	(107)	1,117
Provision for doubtful accounts	16	105	50
Foreign currency transaction losses	18	199	11
Changes in operating assets and liabilities:
Accounts receivable	1,589	2,688	(405)
Inventories	796	(4,049)	834
Prepaid income taxes	577	(100)	(518)
Other current and long term assets	(333)	(161)	(137)
Accounts payable	(517)	(332)	(988)
Accrued liabilities and other liabilities	415	(186)	1,053
Net cash provided by operating activities	4,846	5,109	5,918
Cash flows from investing activities:
Capital expenditures	(1,062)	(1,007)	(835)
Additions to capitalized software	(304)	(466)	(150)
Issuance of note receivable	(1,000)	0	0
Net cash used in investing activities	(2,366)	(1,473)	(985)
Cash flows from financing activities:
Proceeds from stock option exercises	0	416	1,043
Purchases of common stock for treasury	0	(2,000)	(358)
Payment of dividends on common stock	(2,683)	(2,667)	(2,581)
Withholding taxes paid on stock issuances	(214)	(265)	(23)
Net cash used in financing activities	(2,897)	(4,516)	(1,919)
Effect of exchange rate changes on cash and cash equivalents	(71)	64	(10)
(Decrease) increase in cash and cash equivalents	(488)	(816)	3,004
Cash and cash equivalents, beginning of period	4,691	5,507	2,503
Cash and cash equivalents, end of period	4,203	4,691	5,507
Supplemental cash flow information:
Interest paid	30	25	30
Income taxes paid	65	1,249	2,991
Non-cash capital expenditure items	$ 17	$ 21	$ 44