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Equity Incentive Plans - Additional Information (Details) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended
Sep. 30, 2016
Nov. 30, 2014
Dec. 31, 2010
Dec. 31, 2006
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Share-based compensation         $ 787,675 $ 1,853,491 $ 3,490,754 $ 5,573,451
Restricted Stock Units                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Number of RSUs, Granted         0   105,313  
Service Period Stock Options                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Vesting period             4 years  
Number of options, granted             845,131  
Service Period Stock Options | CEO                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Number of options, granted         500,000      
Performance-Vested Stock Options                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Number of options, granted [1]             883,759  
Performance-Vested Stock Options | CEO                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Number of options, granted         500,000      
2006 Stock Plan                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Stock options, number of shares granted       624,223        
Vesting period       5 years        
Stock options, available for grant 0       0   0  
2010 Stock Plan                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Stock options, number of shares granted     2,146,320          
Vesting period     4 years          
Stock options, available for grant 0   2,220,280   0   0  
2014 Omnibus Incentive Plan                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Stock options, number of shares granted 2,500,000 1,479,200         3,979,200  
Vesting period             3 years  
Stock options, available for grant 2,611,636       2,611,636   2,611,636  
2014 Omnibus Incentive Plan | Restricted Stock Units | Employee                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Vesting period             3 years  
2014 Omnibus Incentive Plan | Restricted Stock Units | Non-employee Director                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Vesting period             1 year  
2014 Omnibus Incentive Plan | Performance-Vested Stock Options                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Number of options, granted         266,000      
[1] As of September 30, 2016, 447,501 performance-vested stock options have performance metrics that are probable of achievement. These shares are included in share-based compensation costs for the three and nine months ended September 30, 2016.