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Fair Value Measurements - Additional Information (Details) - Significant Unobservable Inputs (Level 3)
Mar. 31, 2021
Dec. 31, 2019
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Warrant liabilities, maturity date Jun. 12, 2023  
Stock Price Volatility    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Derivative liabilities, unobservable inputs rate 61.5  
Stock Price Volatility | Minimum    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Warrant liabilities, stock price volatility rate 69.6  
Stock Price Volatility | Maximum    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Warrant liabilities, stock price volatility rate 82.5  
Stock Price Volatility | Weighted Average    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Warrant liabilities, stock price volatility rate 77.6  
Weighted Average Expected Term    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Warrant liabilities, expected term 10 months 24 days  
Weighted Average Expected Term | Minimum    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Warrant liabilities, expected term   7 months 28 days
Weighted Average Expected Term | Maximum    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Warrant liabilities, expected term   2 years 2 months 12 days
Market Credit Spread    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Derivative liabilities, unobservable inputs rate 1,451  
Estimated Yield    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Derivative liabilities, unobservable inputs rate 15.1  
Discounts for Lack of Marketability | March 2019 Notes    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Senior convertible notes, unobservable inputs rate 7.1