Fair Value Measurements - Fair Value of Success Payment Liabilities Calculated Using Unobservable Inputs (Details)	6 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Expected Stock Price Volatility | Cobalt
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value contingent consideration measurement input	0.700	0.700
Expected Stock Price Volatility | Harvard
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value contingent consideration measurement input	0.700	0.700
Expected Term (Years) | Cobalt
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value contingent consideration measurement input expected term (years)	17 years 7 months 6 days	18 years 1 month 6 days
Expected Term (Years) | Harvard
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value contingent consideration measurement input expected term (years)	9 years 8 months 12 days	10 years 2 months 12 days