Annual report pursuant to Section 13 and 15(d)

Defined Contribution Plan (Details)

v3.19.1
Defined Contribution Plan (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Defined Contribution Plan      
Company's matching contributions equal to each employee's contribution (as a percent) 50.00%    
Maximum contribution of employees as a percentage of their compensation 6.00%    
Amount expensed $ 264 $ 237 $ 211