Commitments and Contingencies (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Future minimum lease payments on leases with non-cancelable terms [Abstract]
2013	$ 656,000
2014	404,000
Thereafter	21,000
Total	1,081,000
Rent expense included in operating expenses	$ 700,000	$ 700,000
Irvine, California [Member]
Operating Leased Assets [Line Items]
Area of real estate property	26,000
Lease Expiration Date	Jul. 31, 2014
Extension period of lease	3 years
Troy, Michigan [Member]
Operating Leased Assets [Line Items]
Area of real estate property	5,449
Lease Expiration Date	Jul. 31, 2014
Extension period of lease	1 year
Tampa, Florida [Member]
Operating Leased Assets [Line Items]
Area of real estate property	2,843
Lease Expiration Date	May 31, 2015