Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation - Schedule of Information Regarding Stock Option Activity (Detail)

v3.2.0.727
Stock-based Compensation - Schedule of Information Regarding Stock Option Activity (Detail) - $ / shares
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2015
Mar. 31, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of shares, Outstanding at beginning balance 2,544,500 2,519,500   2,519,500    
Number of shares, Options granted 72,235 25,000        
Number of shares, Options exercised 0 0 0 0 0  
Number of shares, Options cancelled or expired 0 0        
Number of shares, Outstanding at ending balance 2,616,735 2,544,500   2,616,735   2,519,500
Number of shares, Vested 799,068     799,068    
Number of shares, Expected to vest 1,708,607     1,708,607    
Number of shares, Exercisable 799,068     799,068    
Weighted-Average Exercise Price, Outstanding at beginning balance $ 2.01 $ 2.00   $ 2.00    
Weighted-Average Exercise Price, Options granted 2.89 2.85        
Weighted-Average Exercise Price, Options exercised 0 0        
Weighted-Average Exercise Price, Options cancelled or expired 0 0        
Weighted-Average Exercise Price, Outstanding ending balance 2.03 $ 2.01   2.03   $ 2.00
Weighted-Average Exercise Price, Vested       2.03    
Weighted-Average Exercise Price, Expected to vest       2.03    
Weighted-Average Exercise Price, Exercisable $ 2.03     $ 2.03    
Weighted-Average Contractual Life, Options granted   5 years 9 months 18 days        
Minimum [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Weighted-Average Contractual Life, Options granted       5 years 3 months 18 days    
Weighted-Average Contractual Life, Outstanding   5 years 7 months 6 days   5 years 3 months 18 days   5 years 7 months 6 days
Maximum [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Weighted-Average Contractual Life, Options granted       5 years 9 months 18 days    
Weighted-Average Contractual Life, Outstanding   5 years 9 months 18 days   5 years 9 months 18 days   5 years 9 months 18 days