Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Net loss	$ (586,000)	$ (2,092,000)	$ (2,996,000)	$ (4,287,000)
Other comprehensive (loss) income, net:
Unrealized gain (loss) gain on investments	(33,000)	4,000	(29,000)	8,000
Reclassification of net realized investment (gain) loss included in net loss	1,000		1,000
Foreign currency translation adjustment	(82,000)	(13,000)	(340,000)	180,000
Total other comprehensive (loss) income	(114,000)	(9,000)	(368,000)	188,000
Comprehensive loss	$ (700,000)	$ (2,101,000)	$ (3,364,000)	$ (4,099,000)