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Restructuring - Additional Information (Details) $ in Millions	3 Months Ended			12 Months Ended
	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Mar. 31, 2020 USD ($) Employee
Restructuring Cost And Reserve [Line Items]
Number of employees terminated \| Employee				52
Percentage of workforce terminated				90.00%
Employee Severance and Benefits Costs [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring charges				$ 2.7
Payments for restructuring	$ 0.1	$ 0.9	$ 1.7