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 6 Months Ended
Jun. 30, 2018
USD ($)
shares
Jun. 30, 2017
USD ($)
Jun. 30, 2018
USD ($)
item
shares
Jun. 30, 2017
USD ($)
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 | $ $ 656 $ 309 $ 1,155 $ 342
Unrecognized compensation cost related to unvested stock options | $ $ 4,949   $ 4,949  
Unvested restricted stock awards 850   850  
Unvested stock options 1,876   1,876  
Unrecognized compensation cost related to unvested restricted stock awards | $ $ 826   $ 826  
Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of stock options issued under a plan     1,538  
Shares issued     1,500  
Number of Vesting Tranches | item     5  
Stock options granted fair value | $     $ 4,595  
2015 Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares issued     1,538