Employee Benefit Plan (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Employee Benefits
Employee benefit plan, Company's portion vested at time of match (as a percent)	100.00%
Employee benefit plan expense	$ 1,359	$ 1,235
Participant's first 3% of deferrals
Employee Benefits
Employee benefit plan, Company match (as a percent)	100.00%
Participant's second 2% of deferrals
Employee Benefits
Employee benefit plan, Company match (as a percent)	50.00%