Commitments and Contingencies (Leases) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating Leased Assets [Line Items]
Operating leases	$ 2,634,000	$ 2,655,000	$ 3,137,000
Capital lease	1,233,000	1,627,000	1,672,000
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Operating leases due in 2014	1,938,000
Operating leases due in 2015	1,089,000
Operating leases due in 2016	848,000
Operating leases due in 2017	419,000
Operating leases due in 2018	234,000
Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Capital leases due in 2014	849,000
Capital leases due in 2015	843,000
Capital leases due in 2016	843,000
Capital leases due in 2017	843,000
Capital leases due in 2018	843,000
Operating leases, future minimum payments due	4,565,000
Capital leases, future minimum payments due	6,328,000
Rogers Innovation Center [Member]
Operating Leased Assets [Line Items]
Operating lease period	3 years
Monthly rent expense	10,000
Minimum yearly research funding commitment	$ 500,000
Minimum [Member]
Operating Leased Assets [Line Items]
Operating lease period	1 year
Maximum [Member]
Operating Leased Assets [Line Items]
Operating lease period	5 years