Annual report pursuant to Section 13 and 15(d)

Warrants - Fair value measurements and valuation techniques (Details)

v3.21.1
Warrants - Fair value measurements and valuation techniques (Details) - Warrant
Dec. 31, 2020
$ / shares
Stock price  
Fair Value Measurement Inputs and Valuation Techniques [Abstract]  
Derivative liability, measurement input 1.27
Exercise price  
Fair Value Measurement Inputs and Valuation Techniques [Abstract]  
Derivative liability, measurement input 0.75
Expected remaining term | Minimum  
Fair Value Measurement Inputs and Valuation Techniques [Abstract]  
Derivative liability, measurement input 5.75
Expected remaining term | Maximum  
Fair Value Measurement Inputs and Valuation Techniques [Abstract]  
Derivative liability, measurement input 5.81
Volatility  
Fair Value Measurement Inputs and Valuation Techniques [Abstract]  
Derivative liability, measurement input 0.675
Risk-free interest rate  
Fair Value Measurement Inputs and Valuation Techniques [Abstract]  
Derivative liability, measurement input 0.005