CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock [Member]	Total
Balance at Dec. 31, 2018	$ 214	$ 78,118	$ (42,569)	$ (1,635)	$ (2,999)	$ 31,129
Balance (in shares) at Dec. 31, 2018	21,485,000				(1,599)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	$ 0	1,513	0	0	$ 0	1,513
Common stock issued for options exercised (in shares)	9,000
Common stock issued for options exercised	$ 1	0	0	0	0	1
Common stock issued for RSUs vested (in shares)	345,000
Common stock issued for RSUs vested	$ 3	(3)	0	0	0	0
Shares withheld to pay taxes	0	(228)	0	0	0	(228)
Foreign currency translation adjustment	0	0	0	(211)	0	(211)
Net loss	0	0	(12,085)	0	0	(12,085)
Balance at Dec. 31, 2019	$ 218	79,400	(54,654)	(1,846)	$ (2,999)	20,119
Balance (in shares) at Dec. 31, 2019	21,839,000				(1,599)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	$ 0	378	0	0	$ 0	378
Common stock issued for RSUs vested (in shares)	354,000
Common stock issued for RSUs vested	$ 4	(4)	0	0	0	0
Shares withheld to pay taxes	0	(87)	0	0	0	(87)
Foreign currency translation adjustment	0	0	0	632	0	632
Net loss	0	0	(10,537)	0	0	(10,537)
Balance at Dec. 31, 2020	$ 222	$ 79,687	$ (65,191)	$ (1,214)	$ (2,999)	$ 10,505
Balance (in shares) at Dec. 31, 2020	22,193,000				(1,599)