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	$ 371	$ 371
Share-based compensation, including issuance of restricted stock, Shares		204,679
Shares of restricted stock withheld for taxes	(23)	$ (23)
Net loss	(7,821)			(7,821)
Foreign currency translation adjustment, net of tax	16	98	(82)
Unrealized gain on investments, net of tax	4		4
Balance at Sep. 30, 2019	$ 10,888	$ 138,726	(1,004)	(126,834)
Balance, Shares at Sep. 30, 2019	12,982,252	12,982,252
Balance at Jun. 30, 2019	$ 11,835	$ 138,562	(1,000)	(125,727)
Balance, Shares at Jun. 30, 2019		12,879,252
Share-based compensation, including issuance of restricted stock	164	$ 164
Share-based compensation, including issuance of restricted stock, Shares		103,000
Shares of restricted stock withheld for taxes	(6)	$ (6)
Net loss	(1,107)			(1,107)
Foreign currency translation adjustment, net of tax	4	6	(2)
Unrealized gain on investments, net of tax	(2)		(2)
Balance at Sep. 30, 2019	$ 10,888	$ 138,726	$ (1,004)	$ (126,834)
Balance, Shares at Sep. 30, 2019	12,982,252	12,982,252