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Stock Based Compensation - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 31, 2016
Jul. 31, 2015
May. 08, 2014
May. 07, 2014
Board of Directors        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Nonemployee services transaction, quarterly fee $ 33      
The 2009 Stock Incentive Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares authorized     15,000,000 2,000,000
Common stock, shares authorized (in shares)   1,875,000    
Compensation cost not yet recognized $ 1,433      
Share price (in dollars per share) $ 21.53      
Period for recognition for compensation cost not yet recognized 7 months 6 days