Annual report pursuant to Section 13 and 15(d)

Benefit Plan - Additional Information (Details)

v3.10.0.1
Benefit Plan - Additional Information (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
401(k) Plan      
Defined Contribution Plan Disclosure [Line Items]      
Company contributions to plan $ 0 $ 0 $ 0