Employee Benefit Plan - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Retirement Benefits [Abstract]
Proportion of employee contributions matched (as a percent)	4.00%
Maximum employer contribution per employee	$ 2,500
Matching contribution amount	$ 200,000	$ 100,000	$ 100,000