Condensed Conslidated Statements of Comprehensive Loss (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Statement of Comprehensive Income [Abstract]
Net loss	$ (2,146)	$ (1,087)	$ (6,730)	$ (21,272)
Unrealized gains (loss) on securities:
Unrealized holding (loss) gain arising during period	(32)	89	3	16
Reclassification for recognized loss on marketable investment securities during the period	(5)	0	(12)	(2)
Net unrealized gain (loss) on marketable investment securities	(37)	89	(9)	14
Foreign currency translation loss	(1,489)	(9)	(1,680)	0
Other comprehensive (loss) income	(1,526)	80	(1,689)	14
Comprehensive loss	$ (3,672)	$ (1,007)	$ (8,419)	$ (21,258)