Consolidated Statements of Changes in Stockholders' Deficit (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss
Balance at Dec. 31, 2011	$ (25,412)	$ 939	$ 80,125	$ (103,454)	$ (3,022)
Balance (in shares) at Dec. 31, 2011		18,860,482
Increase (Decrease) in Stockholders' Equity
Net (loss) income	7,492			7,492
Costs of common stock issued, net	(11)		(11)
Change in fair value of warrants	(100)		(100)
Changes in unrealized losses on securities, net of taxes	911				911
Balance at Jun. 30, 2012	(17,120)	939	80,014	(95,962)	(2,111)
Balance (in shares) at Jun. 30, 2012		18,860,482
Balance at Dec. 31, 2012	(8,372)	939	79,872	(87,337)	(1,846)
Balance (in shares) at Dec. 31, 2012		18,860,482
Increase (Decrease) in Stockholders' Equity
Net (loss) income	(3,754)			(3,754)
Common stock issued, net of costs	298	42	256
Common stock issued, net of costs (in shares)		845,414
Stock-based compensation expense	530		530
Change in fair value of warrants	(402)		(402)
Changes in unrealized losses on securities, net of taxes	(1,561)				(1,561)
Balance at Jun. 30, 2013	$ (13,261)	$ 981	$ 80,256	$ (91,091)	$ (3,407)
Balance (in shares) at Jun. 30, 2013		19,705,896