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Stock-Based Compensation - Additional Information (Detail) - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Contractual term 10 years    
Weighted average grant-date fair value of options granted $ 1.44 $ 1.70 $ 2.45
Options exercised (in shares) 0    
Income tax benefit $ 0 $ 0 $ 0
Total unrecognized compensation costs $ 5,600,000    
Weighted-average remaining period for recognition of unrecognized compensation costs 3 years 1 month 6 days    
Time Based Stock Options [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 4 years    
Options exercised (in shares) 0    
Stock Options [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Options exercised (in shares) 0 6,237  
Intrinsic value of option exercised   $ 25,000  
Liability-Based Awards [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation expense $ 0 $ 0 $ 0
2015 Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares that may be issued pursuant to awards 2,190,320