Summary of Significant Accounting Policies - Revenue by Geographic Location (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 102,877	$ 84,583	$ 84,431	$ 69,744	$ 76,932	$ 68,138	$ 64,292	$ 64,686	$ 341,635	$ 274,048	$ 252,179
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									164,676	134,347	132,326
Other foreign countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									$ 176,959	$ 139,701	$ 119,853