Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Unrecognized Stock-based Compensation Cost and Estimated Weighted Average Amortization Period (Details)

v3.10.0.1
Stock-Based Compensation - Unrecognized Stock-based Compensation Cost and Estimated Weighted Average Amortization Period (Details)
$ in Thousands
6 Months Ended
Jun. 30, 2018
USD ($)
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]  
Unrecognized compensation cost $ 4,671
Employee options  
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]  
Unrecognized compensation cost $ 4,664
Weighted average remaining amortization period (years) 3 years 6 months
Nonemployee options  
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]  
Unrecognized costs of unvested options awarded $ 7
Weighted average remaining amortization period (years) 1 year