XML 90 R80.htm IDEA: XBRL DOCUMENT v3.7.0.1
Share-Based Compensation - Narrative (Details) - USD ($)
3 Months Ended 27 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2017
Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Percentage of average closing price to be paid by employees 85.00%      
Maximum common stock purchases through advance payroll deductions in a calendar year $ 25,000      
Share-based compensation $ 573,000 $ 593,000    
Options granted (in shares)   0  
Forfeiture rate 2.80%      
Income tax benefit from adoption of ASU 2016-09 $ 772,000      
Unrecognized compensation expense related to stock options 0   $ 0  
Aggregate intrinsic value of stock options exercised 1,823,000 77,000    
Cash receipts of stock options exercised $ 1,314,000 $ 73,000    
Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock option term 10 years      
Stock options vesting percentage 100.00%      
Stock Options | Minimum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vested period 6 months      
Stock Options | Maximum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vested period 2 years      
RSAs        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vested period 3 years      
Outstanding DSUs (in shares) 252,046   252,046 328,347
Unrecognized compensation expense related to RSAs $ 3,087,000   $ 3,087,000  
Unrecognized compensation expense expected recognition period 1 year 6 months 20 days      
DSUs | Non-employee Director        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Outstanding DSUs (in shares) 0   0  
ESPP        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unrecognized compensation expense related to stock options $ 0   $ 0  
Grant date fair value of ESPP options $ 48,000