Commitments and Contingencies (Details) (USD $)	3 Months Ended		12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Operating Leased Assets [Line Items]
Expected rent expenses in 2013			$ 400,000
Operating leases [Abstract]
Operating leases due in less than 1 year			272,000
Operating Leases Future Minimum Payments Due In One To Three Years			56,000
Operating Leases Future Minimum Payments Due In Three To Five Years			0
Operating Leases Future Minimum Payments Due In More Than Five Years			0
Operating leases total			328,000
Rent expenses			400,000	300,000	1,400,000
Royalty expense			2,800,000	15,000,000	2,900,000
Number of non-exclusive patent license agreement			3
Litigation settlement payment	$ 31,000,000	$ 31,000,000		$ 31,000,000
Percentage of royalty on undisclosed amount of cumulative sales tranche one (in hundredths)			5.00%	5.00%
Percentage of royalty on undisclosed amount of cumulative sales tranche two (in hundredths)			6.50%	6.50%
Percentage of royalty on all cumulative sales thereafter (in hundredths)			7.50%	7.50%
The Netherlands [Member]
Operating Leased Assets [Line Items]
Lease Expiration Date			Apr. 30, 2013
Square Footage			1,700
Australia [Member]
Operating Leased Assets [Line Items]
Lease Expiration Date			Apr. 30, 2014
Square Footage			1,140
Japan [Member]
Operating Leased Assets [Line Items]
Lease Expiration Date			Apr. 30, 2014
Square Footage			2,150
Germany [Member]
Operating Leased Assets [Line Items]
Lease Expiration Date			Apr. 30, 2014
Square Footage			1,850
Spain [Member]
Operating Leased Assets [Line Items]
Lease Expiration Date			Dec. 31, 2013
Square Footage			4,400