Fair Value - Narrative (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Jun. 30, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrants original basis	$ 9.5	$ 9.5
Put option
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Present value of put liability	$ 50.7	$ 50.7
Put option liability term	39 months