XML 68 R57.htm IDEA: XBRL DOCUMENT v3.8.0.1
Restricted Stock Units - Narrative (Details) - USD ($)
shares in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Tax benefit recognized for stock-based compensation $ 0 $ 0 $ 0 $ 0  
Compensation cost capitalized as part of the cost of an asset $ 0 $ 0 $ 0 $ 0  
Vested deferred restricted stock units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vested and remaining outstanding (in shares) 988 387 988 387  
Unvested units outstanding (in shares) 2,387   2,387   3,196
Unrecognized stock-based compensation expense $ 1,161,000   $ 1,161,000    
Vested deferred restricted stock units | Non-Employee Directors          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vested and remaining outstanding (in shares)     988    
Performance-based Restricted Stock Units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Unvested units outstanding (in shares) 1,715   1,715    
Unrecognized stock-based compensation expense $ 944,000   $ 944,000    
Time-based Restricted Stock Units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Unvested units outstanding (in shares) 672   672    
Unrecognized stock-based compensation expense $ 217,000   $ 217,000    
Weighted average period for amortization of unrecognized stock-based compensation     6 months 31 days