Consolidated Statement of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Comprehensive income (loss):
Net income (loss)	$ (1,782)	$ (1,822)	$ (4,410)	$ 1,543
Other comprehensive income (loss):
Change in unrealized gain (loss) on available for sale marketable securiteis, net of tax	(132)	(223)	107	109
Total comprehensive income (loss)	$ (1,914)	$ (2,045)	$ (4,303)	$ 1,652