Quarterly report pursuant to Section 13 or 15(d)

Common Stock - Additional Information 1 (Detail)

v3.2.0.727
Common Stock - Additional Information 1 (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Unrecognized compensation expense related to stock options granted $ 2.4   $ 2.4   $ 2.7
Effect on diluted per share on options, restricted stock units and warrants 7,600,000 3,700,000 7,600,000 3,700,000  
Number Of Warrants Exercised     0 0  
Stock Options [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 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 7 months 6 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 $ 0.6 $ 1.1  
Total unrecognized compensation expense related to the Company's restricted stock unit awards $ 2.6   $ 2.6