XML 90 R70.htm IDEA: XBRL DOCUMENT v3.8.0.1
Stockholders' Equity - Summary of Stock Options Outstanding and Exercisable (Detail) - $ / shares
shares in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
$4.15 - $7.01        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Range of Exercise Price, lower limit (in dollars per share) $ 4.15      
Range of Exercise Price, Upper limit (in dollars per share) 7.01      
$7.13 - $7.21        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Range of Exercise Price, lower limit (in dollars per share) 7.13      
Range of Exercise Price, Upper limit (in dollars per share) 7.21      
$4.15 - $7.21        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Range of Exercise Price, lower limit (in dollars per share) 4.15      
Range of Exercise Price, Upper limit (in dollars per share) $ 7.21      
Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of Options Outstanding (in shares) 804 1,008 1,103 1,641
Options Outstanding, Weighted Average Exercise Price (in dollars per share) $ 4.99 $ 5.40 $ 5.37 $ 5.26
Number of Options Exercisable (in shares) 775 977 1,072  
Options Exercisable, Weighted Average Exercise Price (in dollars per share) $ 5.00 $ 5.42 $ 5.39  
Stock Options | $4.15 - $7.01        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of Options Outstanding (in shares) 733      
Options Outstanding, Weighted Average Exercise Price (in dollars per share) $ 4.78      
Options Outstanding, Weighted Average Remaining Contractual Life 1 year 5 months 27 days      
Number of Options Exercisable (in shares) 704      
Options Exercisable, Weighted Average Exercise Price (in dollars per share) $ 4.78      
Options Exercisable, Weighted Average Remaining Contractual Life 1 year 6 months 4 days      
Stock Options | $7.13 - $7.21        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of Options Outstanding (in shares) 71      
Options Outstanding, Weighted Average Exercise Price (in dollars per share) $ 7.14      
Options Outstanding, Weighted Average Remaining Contractual Life 4 months 28 days      
Number of Options Exercisable (in shares) 71      
Options Exercisable, Weighted Average Exercise Price (in dollars per share) $ 7.15      
Options Exercisable, Weighted Average Remaining Contractual Life 4 months 28 days      
Stock Options | $4.15 - $7.21        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of Options Outstanding (in shares) 804      
Options Outstanding, Weighted Average Exercise Price (in dollars per share) $ 4.99      
Options Outstanding, Weighted Average Remaining Contractual Life 1 year 4 months 24 days      
Number of Options Exercisable (in shares) 775      
Options Exercisable, Weighted Average Exercise Price (in dollars per share) $ 5.00      
Options Exercisable, Weighted Average Remaining Contractual Life 1 year 4 months 28 days