Condensed Conslidated Statements of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement of Comprehensive Income [Abstract]
Net (loss)	$ (1,087)	$ (3,324)	$ (21,272)	$ (6,532)
Unrealized gains (losses) on securities:
Unrealized holding (losses) gains arising during period	89	35	16	141
Reclassification for recognized gain (loss) on marketable investment securities during the period	0	0	(2)	(3)
Net unrealized (loss) gain on marketable investment securities	89	35	14	138
Foreign currency translation (loss) gain	(9)	(8)	0	(13)
Other comprehensive income	80	27	14	125
Comprehensive loss	$ (1,007)	$ (3,297)	$ (21,258)	$ (6,407)