Consolidated Statement of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Deficit [Member]
Balance at Dec. 31, 2018	$ 18,341	$ 138,280	$ (926)	$ (119,013)
Balance, Shares at Dec. 31, 2018	12,777,573	12,777,573
Share-based compensation, including issuance of restricted stock	$ 207	$ 207
Share-based compensation, including issuance of restricted stock, Shares		101,679
Shares of restricted stock withheld for taxes	(17)	$ (17)
Net loss	(6,714)			(6,714)
Foreign currency translation adjustment, net of tax	12	92	(80)
Unrealized gain on investments, net of tax	6		6
Balance at Jun. 30, 2019	$ 11,835	$ 138,562	(1,000)	(125,727)
Balance, Shares at Jun. 30, 2019	12,794,598	12,879,252
Balance at Mar. 31, 2019	$ 15,673	$ 138,448	(916)	(121,859)
Balance, Shares at Mar. 31, 2019		12,823,298
Share-based compensation, including issuance of restricted stock	40	$ 40
Share-based compensation, including issuance of restricted stock, Shares		55,954
Shares of restricted stock withheld for taxes	(18)	$ (18)
Net loss	(3,868)			(3,868)
Foreign currency translation adjustment, net of tax	10	92	(82)
Unrealized gain on investments, net of tax	(2)		(2)
Balance at Jun. 30, 2019	$ 11,835	$ 138,562	$ (1,000)	$ (125,727)
Balance, Shares at Jun. 30, 2019	12,794,598	12,879,252