Quarterly report pursuant to Section 13 or 15(d)

Stock Based Compensation - Performance Share Units - Additional Information (Detail)

v3.10.0.1
Stock Based Compensation - Performance Share Units - Additional Information (Detail) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
Oct. 24, 2016
May 21, 2015
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Performance based equity plan market capitalization minimum amount             $ 100,000,000
Performance based equity plan market capitalization maximum amount             $ 1,100,000,000
Performance Shares [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share-based compensation arrangement by share-based payment award, equity instruments other than options, grants in period         0   0
Share based compensation arrangement by share based payment award equity instruments other than options grants in period fair value         $ 3,218,000    
Share based compensation arrangement by share based payment award unamortized value         $ 412,160    
Share based compensation arrangement by share based payment award unamortized weighted average period         6 months    
Performance Shares and Inducement Award [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share-based compensation arrangement by share-based payment award, equity instruments other than options, grants in period         1,342,061    
Inducement PSU Award [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share-based compensation arrangement by share-based payment award, equity instruments other than options, grants in period         63,908    
Performance Share Units [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share-based compensation arrangement by share-based payment award, equity instruments other than options, vested in period, fair value         $ 298,857,000    
Share-based compensation arrangement by share-based payment award, fair value assumptions, expected dividend rate         0.00%    
Share-based compensation arrangement by share-based payment award, fair value assumptions, expected volatility rate         75.00%    
Share-based compensation arrangement by share-based payment award, fair value assumptions, risk free interest rate         0.66%    
Allocated share-based compensation expense     $ 204,954 $ 587,433 $ 407,656 $ 1,201,293  
Performance Based Equity Plan [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Performance based equity plan market capitalization minimum amount   $ 100,000,000          
Performance based equity plan market capitalization maximum amount   $ 1,100,000,000          
Percentage of performance share units to be earned on achievement of market capitalization growth   100.00%     100.00%   100.00%
2015 Performance Share Unit Plan [Member] | Performance Shares [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share-based compensation arrangement by share-based payment award, equity instruments other than options, grants in period         1,278,153    
2013 Equity Incentive Plan [Member] | Performance Share Units [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share based compensation arrangement by share based payment award equity instruments other than options grants in period fair value         $ 2,332,000    
2013 Equity Incentive Plan [Member] | Performance Share Units [Member] | Mr. Rizzone [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share-based compensation arrangement by share-based payment award, equity instruments other than options, grants in period 150,000