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Stock Incentive Plans - Additional Information (Details) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Mar. 01, 2017
Dec. 15, 2016
Dec. 31, 2017
Sep. 30, 2017
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of outstanding options (in shares)       1,565,906 1,565,906       1,942,909
Outstanding options exercise price, lower range limit (in dollars per share)         $ 4.28 $ 4.28      
Outstanding options exercise price, upper range limit (in dollars per share)         $ 505 $ 505      
Remaining years for options to vest and become exercisable         4 years 4 years      
Remaining years until options expire         7 years 7 years      
Forecast                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Future compensation to be recognized     $ 1,907,849       $ 1,258,777 $ 6,891,228  
Equity Compensation Plan                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Equity compensation plan, shares authorized (in shares)   5,348,613              
Maximum number of shares can be granted per employee in one year (in shares)   3,000,000              
Maximum number of options and stock appreciation rights can be granted per employee in one year (in shares)   3,000,000              
Maximum number of shares can be granted to non-employee director in one year (in shares)   500,000              
Stock options granted (in shares) 337,000                
Equity Compensation Plan | Restricted Stock                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Restricted shares granted (in shares) 429,750                
Fair value, restricted shares, at grant date $ 2,300,000                
Future compensation to be recognized       $ 300,000 $ 800,000        
Equity Compensation Plan | Employee Stock Option                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Fair value, restricted shares, at grant date $ 900,000                
Future compensation to be recognized       $ 100,000 $ 300,000        
Risk free interest rate 1.72%                
Stock price volatility factor 63.50%                
Dividend rate 0.00%                
Management Incentive Plan                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Common stock subject to outstanding awards (in shares)                 24,644
Management Incentive Plan and Equity Compensation Plan                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Stock awards outstanding (in shares)       1,853,637 1,853,637       1,413,461
Management Incentive Plan and Equity Compensation Plan | Minimum                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Award vesting period         1 year        
Management Incentive Plan and Equity Compensation Plan | Maximum                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Award vesting period         3 years