Restatement of Previously Issued Financial Statements - Statements of Operations (Additional Information) (Details) (Details) - Restatement Impacts - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Write-off of Assets
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Increase (decrease) in selling, general, and administrative expenses	$ 2.2	$ 3.3
Reversal of Revenue
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Increase (decrease) in revenue	(0.5)	(0.5)
Correction of misclassification of selling and marketing expenses
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Increase (decrease) in selling, general, and administrative expenses	0.5	1.8
Tax adjustments related to adjustments
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Increase (decrease) to income tax expense		0.1
Correction of other immaterial errors
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Increase (decrease) in selling, general, and administrative expenses	$ (0.1)
Increase (decrease) in revenue		0.2
Increase (decrease) to cost of sales		(0.1)
Increase (decrease) in other expense		$ 0.1