Fair Value Measurements Fair Value Measurements - Fair Value Assumptions Using Black-Scholes-Merton Option Pricing Model (Details) - Valuation Technique, Option Pricing Model	Jun. 30, 2020
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Time until expiration (years)	3 years 9 months 15 days
Stock price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrant liabilities, measurement inputs	3.70
Exercise price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrant liabilities, measurement inputs	7.63
Expected volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrant liabilities, measurement inputs	0.700
Risk-free interest rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrant liabilities, measurement inputs	0.003
Expected dividend yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrant liabilities, measurement inputs	0.00