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Subsequent Events (Details) - USD ($)
12 Months Ended 21 Months Ended
Feb. 25, 2016
Jan. 05, 2016
Dec. 03, 2015
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2017
Subsequent Event [Line Items]                
Options granted (in shares)             1,795,100  
Weighted average exercise price (in dollars per share)             $ 33.21  
Restricted stock units | Tranche one                
Subsequent Event [Line Items]                
Vesting percentage     25.00%          
Chief Executive Officer | Scenario, forecast                
Subsequent Event [Line Items]                
Options granted (in shares)       250,000 250,000      
Chief Operating Officer | Scenario, forecast                
Subsequent Event [Line Items]                
Options granted (in shares)       90,000 120,000      
Subsequent event | Chief Executive Officer                
Subsequent Event [Line Items]                
Employment agreement   5 years            
Current compensation   $ 650,000            
Compensation in 2017   700,000            
Compensation in 2018, 2019 and 2020   $ 750,000            
Annual target bonus, percentage of then-current salary   60.00%            
Annual bonus award if performance objective achievement is surpassed, percentage of then-current salary   90.00%            
Performance objective achievement, percentage required to receive annual bonus percentage greater than target bonus percentage   120.00%            
Sign-on bonus   $ 200,000            
Monthly housing allowance   $ 6,000            
Subsequent event | Chief Executive Officer | Restricted stock units                
Subsequent Event [Line Items]                
Options granted (in shares)   250,000            
Vesting period   4 years            
Subsequent event | Chief Executive Officer | Restricted stock units | Tranche one                
Subsequent Event [Line Items]                
Vesting percentage   25.00%            
Subsequent event | Chief Executive Officer | Restricted stock units | Tranche two                
Subsequent Event [Line Items]                
Vesting percentage   6.25%            
Subsequent event | Chief Executive Officer | 2012 Stock Incentive Plan | Restricted stock units                
Subsequent Event [Line Items]                
Options granted (in shares)   250,000            
Weighted average exercise price (in dollars per share)   $ 9.42            
Stock options, term   10 years            
Vesting period   4 years            
Subsequent event | Chief Executive Officer | 2012 Stock Incentive Plan | Restricted stock units | Tranche one                
Subsequent Event [Line Items]                
Vesting percentage   25.00%            
Subsequent event | Chief Executive Officer | 2012 Stock Incentive Plan | Restricted stock units | Tranche two                
Subsequent Event [Line Items]                
Vesting percentage   6.25%            
Subsequent event | Executive Chair                
Subsequent Event [Line Items]                
Employment agreement   5 years            
Current compensation   $ 500,000            
Annual target bonus, percentage of then-current salary   60.00%            
Annual bonus award if performance objective achievement is surpassed, percentage of then-current salary   90.00%            
Performance objective achievement, percentage required to receive annual bonus percentage greater than target bonus percentage   100.00%            
Subsequent event | Executive Chair | Scenario, plan                
Subsequent Event [Line Items]                
Retention bonus available on the last day of each quarter               $ 37,500
Subsequent event | Chief Operating Officer                
Subsequent Event [Line Items]                
Current compensation $ 425,000              
Annual target bonus, percentage of then-current salary 50.00%              
Options granted (in shares) 350,000              
Stock options, term 10 years              
Vesting period 4 years              
Period of time when vesting of stock may accelerate in full 1 year              
Subsequent event | Chief Operating Officer | Scenario, plan                
Subsequent Event [Line Items]                
Retention bonus available on the last day of each quarter           $ 100,000    
Subsequent event | Chief Operating Officer | Tranche one                
Subsequent Event [Line Items]                
Vesting percentage 25.00%              
Subsequent event | Chief Operating Officer | Tranche two                
Subsequent Event [Line Items]                
Vesting percentage 6.25%