CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY (Unaudited) - 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, 2017	$ 210	$ 76,802	$ (42,870)	$ (1,471)	$ (2,999)	$ 29,672
Balance (in shares) at Dec. 31, 2017	21,024,395				(1,598,911)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense		968				968
Common stock issued for options exercised (in shares)	129,513
Common stock issued for options exercised	$ 1	93				94
Common stock issued for RSUs vested (in shares)	156,898
Common stock issued for RSUs vested	$ 2	(2)				0
Shares withheld to pay taxes		(250)				(250)
Foreign currency translation adjustment				(227)		(227)
Net income (loss)			(515)			(515)
Balance at Jun. 30, 2018	$ 213	77,611	(42,730)	(1,698)	$ (2,999)	30,397
Balance (in shares) at Jun. 30, 2018	21,310,806				(1,598,911)
Balance at Mar. 31, 2018	$ 212	77,376	(43,711)	(1,516)	$ (2,999)	29,362
Balance (in shares) at Mar. 31, 2018	21,215,884				(1,598,911)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense		373				373
Common stock issued for options exercised (in shares)	20,000
Common stock issued for options exercised	$ 0	37				37
Common stock issued for RSUs vested (in shares)	74,922
Common stock issued for RSUs vested	$ 1	(1)
Shares withheld to pay taxes		(174)				(174)
Foreign currency translation adjustment				(182)		(182)
Net income (loss)			981			981
Balance at Jun. 30, 2018	$ 213	77,611	(42,730)	(1,698)	$ (2,999)	30,397
Balance (in shares) at Jun. 30, 2018	21,310,806				(1,598,911)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of adopting ASC 606			655			655
Balance at Dec. 31, 2018	$ 214	78,118	(42,569)	(1,635)	$ (2,999)	31,129
Balance (in shares) at Dec. 31, 2018	21,485,445				(1,598,911)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense		1,069				1,069
Common stock issued for options exercised (in shares)	9,011
Common stock issued for options exercised	$ 1	74				75
Common stock issued for RSUs vested (in shares)	205,000
Common stock issued for RSUs vested	$ 2	(2)				0
Shares withheld to pay taxes		(231)				(231)
Foreign currency translation adjustment				(60)		(60)
Net income (loss)			(4,361)			(4,361)
Balance at Jun. 30, 2019	$ 217	79,028	(46,930)	(1,695)	$ (2,999)	27,621
Balance (in shares) at Jun. 30, 2019	21,698,635				(1,598,911)
Balance at Mar. 31, 2019	$ 216	78,578	(46,805)	(1,722)	$ (2,999)	27,268
Balance (in shares) at Mar. 31, 2019	21,595,215				(1,598,911)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense		499				499
Common stock issued for options exercised (in shares)	7,503
Common stock issued for options exercised	$ 0	33				33
Common stock issued for RSUs vested (in shares)	95,917
Common stock issued for RSUs vested	$ 1	(1)				0
Shares withheld to pay taxes		(81)				(81)
Foreign currency translation adjustment				27		27
Net income (loss)			(125)			(125)
Balance at Jun. 30, 2019	$ 217	$ 79,028	$ (46,930)	$ (1,695)	$ (2,999)	$ 27,621
Balance (in shares) at Jun. 30, 2019	21,698,635				(1,598,911)