Employee Benefit Plan (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Aug. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Employee Benefit Plan
Maximum employer match as a percentage of base pay	5.00%	3.00%
Percentage the employer matches of employee contributions	100.00%	50.00%
Portion of the employee's base salary that the Company matches	5.00%	6.00%
Employer matching contributions to the plan		$ 0.3	$ 0.2	$ 0.3