Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended				9 Months Ended		93 Months Ended	108 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2020	Dec. 31, 2019	Mar. 31, 2019	Jun. 30, 2020
Commitments and Contingencies [Line Items]
Purchase commitment, due in next twelve months					$ 49.3
Minimum
Commitments and Contingencies [Line Items]
Length of purchase commitments					60 days
Maximum
Commitments and Contingencies [Line Items]
Length of purchase commitments					120 days
Government Contract
Commitments and Contingencies [Line Items]
Charges to income from price adjustment clauses				$ 4.8
GSA matter and imputed interest	$ 0.2		$ 0.1	0.5		$ 0.7
Total estimated liability from price adjustment clauses				$ 5.3	$ 13.1
Reduction in sales, adjustment	$ 0.6	$ 5.8
Estimated aggregate overcharge in contracts							$ 10.6	$ 11.2
Other Expense | Government Contract
Commitments and Contingencies [Line Items]
Total estimated liability from price adjustment clauses						$ 6.5