Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Details)

v3.10.0.1
Stock-Based Compensation (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2018
shares
Mar. 31, 2018
shares
Jun. 30, 2018
tranche
shares
Stock-Based compensation      
Maximum number of shares available for future issuance 3,091,345   3,091,345
Unvested restricted stock units and awards      
Stock-Based compensation      
Number of shares vested 253,279 503,668  
Performance-based restricted stock unit awards      
Stock-Based compensation      
Number of shares vested   26,000  
Threshold percentage of metrics to be achieved     100.00%
Number of annual tranches | tranche     3
Performance-based restricted stock unit awards | Minimum      
Stock-Based compensation      
Number of shares to vest upon each evaluation date (as a percent) 50.00%   50.00%
Performance-based restricted stock unit awards | Maximum      
Stock-Based compensation      
Number of shares to vest upon each evaluation date (as a percent) 150.00%   150.00%