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Stock-Based Incentive Plan (Details 2) (USD $)
 6 Months Ended
Dec. 31, 2013
Number of Stock Options and Incentive Warrants  
Stock Options and Incentive Warrants outstanding at the end of the period (in shares) 4,800,000
Common stock
  
Additional disclosures of Stock Options and Incentive Warrants  
Market price of common stock on the last trading date of the period (in dollars per share) $ 12.34
Stock Options and Incentive Warrants
  
Number of Stock Options and Incentive Warrants  
Stock Options and Incentive Warrants outstanding at the beginning of the period (in shares) 4,822,820
Exercised (in shares) (4,069,815)
Stock Options and Incentive Warrants outstanding at the end of the period (in shares) 753,005
Vested or expected to vest at the end of the period (in shares) 753,005
Exercisable at the end of the period (in shares) 753,005
Weighted Average Exercise Price  
Stock Options and Incentive Warrants outstanding at the beginning of the period (in dollars per share) $ 1.99
Exercised (in dollars per share) $ 1.99
Stock Options and Incentive Warrants outstanding at the end of the period (in dollars per share) $ 2.01
Exercisable at the end of the period (in dollars per share) $ 2.01
Vested or expected to vest at the end of the period (in dollars per share) $ 2.01
Aggregate Intrinsic Value  
Stock Options and Incentive Warrants outstanding at the end of the period $ 7,778,744
Vested or expected to vest at the end of the period 7,778,744
Exercisable at the end of the period (in dollars) 7,778,744
Weighted Average Remaining Contractual Term (in years)  
Stock Options and Incentive Warrants outstanding at the end of the period 2 years
Vested or expected to vest at the end of the period 2 years
Exercisable at the end of the period 2 years
Additional disclosures of Stock Options and Incentive Warrants  
Aggregate intrinsic value of Stock Options and warrants exercised $ 41,247,805