Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current tax expense:
Federal			$ 20
State	263	650	90
Foreign	93	57	98
Total	356	707	208
Deferred tax expense (benefit):
Federal	1,178	333	(930)
State	173	49	(203)
Foreign			360
Change in valuation allowance	(1,323)	(324)	21,881
Total	(28)	58	21,108
Unrecognized tax benefit	17	78	79
Income tax provision	$ 401	$ 843	$ 21,395