Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation Plan (Narrative) (Details)

v3.10.0.1
Stock-Based Compensation Plan (Narrative) (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
USD ($)
shares
Sep. 30, 2017
USD ($)
Sep. 30, 2018
USD ($)
item
shares
Sep. 30, 2017
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Maximum number of shares of common stock that may be granted through awards to any employee in any calendar year     500  
Allocated Share-based Compensation Expense | $ $ 912 $ 387 $ 2,067 $ 729
Unrecognized compensation cost related to unvested stock options | $ $ 5,834   $ 5,834  
Unvested restricted stock awards 350   350  
Unvested stock options 2,184   2,184  
Unrecognized compensation cost related to unvested restricted stock awards | $ $ 350   $ 350  
Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of stock options issued under a plan     1,913  
Shares issued     1,875  
Number of Vesting Tranches | item     5  
Stock options granted fair value | $     $ 5,956  
2015 Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares issued     1,913