Commitments and Contingencies - Royalty Obligations (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended
	Jul. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Cost of revenue
Other Commitments [Line Items]
Royalty expense		$ 0.7	$ 1.1
Royalty Agreement, March 2005
Other Commitments [Line Items]
Minimum quarterly royalty payments		$ 0.3	$ 0.1
Term of agreement		15 years
Extended term of agreement	10 years
Royalty Agreement, April 2012
Other Commitments [Line Items]
Term of agreement		15 years
Royalty as a percent of sales		5.00%