Shareholders' Equity (Details) (USD $)	1 Months Ended		9 Months Ended
	Feb. 28, 2011	May 31, 2010	Sep. 30, 2012	Feb. 17, 2012	Jan. 31, 2012
Summary of stock option activity
Options, Outstanding December 31, 2011			10,774,078
Purchase of stock option	2,609,898	1,245,455	477,500
Options, Exercised			(689,000)
Options, Forfeited or expired			(200,000)
Options, Vested or expected to vest			9,592,648	20,000	60,000
Options, Outstanding September 30, 2012			10,362,578
Weighted Average Exercise Price, Outstanding			$ 1.07
Weighted Average Exercise Price, Granted			$ 3.08
Weighted Average Exercise Price, Exercised			$ 1.02
Weighted Average Exercise Price, Forfeited or expired			$ (2.25)
Weighted Average Exercise Price, Outstanding			$ 1.15
Weighted Average Exercise Price, Vested or expected to vest			$ 1.03
Weighted Average Contractual Term, Outstanding			4 years 3 months 18 days
Weighted Average Contractual Term, Vested or expected to vest			4 years
Aggregate Intrinsic Value, Outstanding			$ 17,388,999
Aggregate Intrinsic Value, Vested or expected to vest			$ 17,102,249