Quarterly report pursuant to Section 13 or 15(d)

Common Stock - Additional Information 1 (Detail)

v3.3.0.814
Common Stock - Additional Information 1 (Detail) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Oct. 23, 2015
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Unrecognized compensation expense related to stock options granted   $ 2.1   $ 2.1   $ 2.7
Effect on diluted per share on options, restricted stock units and warrants   7,600,000 8,300,000 7,600,000 8,300,000  
Number Of Warrants Exercised       0 0  
Warrant issued in October 2010 [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of warrants expired unexercised 1,587,301          
Stock Options [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Weighted-average period, restricted stock awards       2 years 2 months 12 days    
Effect on diluted per share on options, restricted stock units and warrants   1,700,000   1,700,000    
Warrant [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Effect on diluted per share on options, restricted stock units and warrants   5,300,000   5,300,000    
Restricted Stock Unit [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Weighted-average period, restricted stock awards       2 years 4 months 24 days    
Effect on diluted per share on options, restricted stock units and warrants   600,000   600,000    
Award vesting period       4 years    
Stock based compensation expense   $ 0.4 $ 0.6 $ 1.0 $ 1.7  
Total unrecognized compensation expense related to the Company's restricted stock unit awards   $ 2.4   $ 2.4