XML 62 R51.htm IDEA: XBRL DOCUMENT v3.8.0.1
Stock-Based Compensation - Additional Information (Details) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended
Aug. 31, 2017
Feb. 28, 2017
Sep. 30, 2017
Sep. 30, 2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Stock options issue or exercised       0
Unrecognized stock-based compensation cost     $ 3,786,000 $ 3,786,000
Recognition period start date       2017-10
Recognition period end date       2020-02
Restricted Stock Units (RSUs)        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Number of RSUs or SARs granted       712,000
Vesting period of stock-based award granted       3 years
Stock-based compensation expenses     346,000 $ 985,000
Restricted Stock Units (RSUs) | Employees        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Number of RSUs or SARs granted   612,000    
Restricted Stock Units (RSUs) | Chairman of the Board of Directors        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Number of RSUs or SARs granted 100,000      
Restricted Stock Units (RSUs) | Vesting on First Anniversary        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Share-based compensation award vesting rights, Percentage       40.00%
Restricted Stock Units (RSUs) | Vesting on Second Anniversary        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Share-based compensation award vesting rights, Percentage       30.00%
Restricted Stock Units (RSUs) | Vesting on Third Anniversary        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Share-based compensation award vesting rights, Percentage       30.00%
Stock Appreciation Rights (SARs)        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Number of RSUs or SARs granted   700,000   700,000
Vesting period of stock-based award granted   3 years    
Share-based compensation expiration period   5 years    
Stock-based compensation expenses     346,000 $ 985,000
Stock Appreciation Rights (SARs) | Vesting on First Anniversary        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Share-based compensation award vesting rights, Percentage   40.00%    
Stock Appreciation Rights (SARs) | Vesting on Second Anniversary        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Share-based compensation award vesting rights, Percentage   30.00%    
Stock Appreciation Rights (SARs) | Vesting on Third Anniversary        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Share-based compensation award vesting rights, Percentage   30.00%    
Stock Options        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Stock-based compensation expenses     $ 346,000 $ 985,000