Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Statement of Other Comprehensive Income [Abstract]
Net income (loss)	$ 1,737	$ (900)	$ 2,082	$ (2,242)
Other comprehensive loss, net:
Change in unrealized loss on investments, net	110	0	(81)	0
Comprehensive income (loss)	$ 1,847	$ (900)	$ 2,001	$ (2,242)