Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Net loss	$ (1,497,000)	$ (3,142,000)	$ (2,195,000)	$ (7,087,000)
Other comprehensive (loss) income, net:
Unrealized (loss) gain on investments	(11,000)	(31,000)	4,000	(15,000)
Reclassification of net realized investment (gains) losses included in net loss		28,000		27,000
Foreign currency translation adjustment	145,000	191,000	193,000	(141,000)
Total other comprehensive loss	134,000	188,000	197,000	(129,000)
Comprehensive loss	$ (1,363,000)	$ (2,954,000)	$ (1,998,000)	$ (7,216,000)