Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Net loss	$ (2,092,000)	$ (1,895,000)	$ (4,287,000)	$ (8,982,000)
Other comprehensive (loss) income, net:
Unrealized (loss) gain on investments	4,000	(5,000)	8,000	(20,000)
Reclassification of net realized investment losses included in net loss		17,000		44,000
Foreign currency translation adjustment	(13,000)	141,000	180,000
Total other comprehensive income (loss)	(9,000)	153,000	188,000	24,000
Comprehensive loss	$ (2,101,000)	$ (1,742,000)	$ (4,099,000)	$ (8,958,000)