Income Taxes (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Amounts computed at statutory federal rate									$ (3,131)	$ 1,317	$ 1,204
State taxes net of federal benefit									(293)	196	(2)
Meals & entertainment									(10)	(8)	(9)
Acquisition related transaction costs									0	0	(37)
Imputed interest									(285)	(259)	(255)
CVRs									(2,027)	695	(601)
Stock-based compensation									556	581	(597)
Expired NOLs									0	(6,847)	(678)
Expired research and development credits									641	(1,984)	(1,200)
R&D credit study									3,940	0	0
Change in uncertain tax positions									(364)	830	0
Rate change for changes in state law									(901)	(3,388)	0
Increase in deferred tax assets from completion of 382 analysis									(786)	53,257	0
Change in valuation allowance									3,509	(41,768)	15,486
Other									(1,223)	(1,431)	(41)
Income tax expense from continuing operations	$ (138)	$ (60)	$ (110)	$ (66)	$ 1,636	$ (142)	$ (338)	$ 35	$ (374)	$ 1,191	$ 13,270