Condensed Consolidated Statements of Stockholders' Equity (unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid - In Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
BALANCE at beginning of year at Dec. 31, 2020	$ 71,398	$ 18	$ 128,250	$ (56,888)	$ 18
Stock-based compensation expense	618	1	617	0	0
Issuance of shares for stock purchase plans and stock options	8	0	8	0	0
Cancellation of shares for payment of withholding tax	(659)	0	(659)	0	0
Repurchase of common stock	(31)	0	(31)	0	0
Dividends paid	(1,011)	0	(1,011)	0	0
Net loss	(662)	0	0	(662)	0
Change in cumulative translation adjustment, net	(16)	0	0	0	(16)
BALANCE at end of year at Mar. 31, 2021	69,645	19	127,174	(57,550)	2
BALANCE at beginning of year at Dec. 31, 2021	66,921	18	123,998	(56,735)	(360)
Stock-based compensation expense	774	0	774	0	0
Cancellation of shares for payment of withholding tax	(392)	0	(392)	0	0
Dividends paid	(1,001)	0	(1,001)	0	0
Net loss	(1,564)	0	0	(1,564)	0
Change in cumulative translation adjustment, net	(226)	0	0	0	(226)
BALANCE at end of year at Mar. 31, 2022	$ 64,512	$ 18	$ 123,379	$ (58,299)	$ (586)