Commitments and Contingencies - Lease Commitment To Releated Party (Details) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Commitments And Contingencies - Lease Commitment To Releated Party Details
Lease commitment	$ 364,500
Rent expense			712,248	1,066,990	1,066,990
Annual rental under new lease		486,000
Approximate storage costs		$ 15,000