Consolidated Statement of Stockholders' Equity - 3 months ended Mar. 31, 2019 - 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	$ 168	$ 168
Share-based compensation, including issuance of restricted stock, Shares		45,725
Net loss	(2,846)			(2,846)
Foreign currency translation adjustment, net of tax	2		2
Unrealized gain on investments, net of tax	8		8
Balance at Mar. 31, 2019	$ 15,673	$ 138,448	$ (916)	$ (121,859)
Balance, Shares at Mar. 31, 2019	12,823,298	12,823,298