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Derivative Financial Instruments - Warrants (Details)
3 Months Ended
Mar. 31, 2020
USD ($)
$ / shares
shares
Mar. 31, 2019
USD ($)
$ / shares
Sep. 30, 2018
Changes in the Company's derivative financial instruments liability balance      
Balance of warrants outstanding at the beginning of the period (in shares) | shares 10,589,482    
Balance of warrants outstanding at the end of the period (in shares) | shares 10,516,377    
Balance of derivative financial instruments liability at the beginning of the period $ 4,127    
Change in fair value of warrants during the period recognized as a gain in the condensed consolidated statement of operations (2,107) $ 9,761  
Balance of derivative financial instruments liability at the end of the period $ 2,020    
Warrants | Weighted Average      
Range of assumptions used to determine the fair value of warrants      
Estimated fair value of Trovagene common stock (in dollars per share) | $ / shares $ 1.01    
Warrants | Black Scholes Option Pricing Method      
Changes in the Company's derivative financial instruments liability balance      
Balance of warrants outstanding at the beginning of the period (in shares) | shares 64,496    
Balance of warrants outstanding at the end of the period (in shares) | shares 64,496    
Balance of derivative financial instruments liability at the beginning of the period $ 4,127    
Change in fair value of warrants during the period recognized as a gain in the condensed consolidated statement of operations (2,107)    
Balance of derivative financial instruments liability at the end of the period $ 2,020    
Warrants | Black Scholes Option Pricing Method | Minimum      
Range of assumptions used to determine the fair value of warrants      
Estimated fair value of Trovagene common stock (in dollars per share) | $ / shares $ 1.01 $ 3.15  
Warrants | Black Scholes Option Pricing Method | Maximum      
Range of assumptions used to determine the fair value of warrants      
Estimated fair value of Trovagene common stock (in dollars per share) | $ / shares $ 1.24 $ 3.75  
Expected warrant term | Warrants | Weighted Average      
Range of assumptions used to determine the fair value of warrants      
Expected warrant term 2 years 9 months 8 days    
Expected warrant term | Warrants | Black Scholes Option Pricing Method | Minimum      
Range of assumptions used to determine the fair value of warrants      
Expected warrant term 2 years 9 months 19 days 3 years 9 months 19 days  
Expected warrant term | Warrants | Black Scholes Option Pricing Method | Maximum      
Range of assumptions used to determine the fair value of warrants      
Expected warrant term 3 years 1 month 4 years 1 month  
Risk-free interest rate | Warrants | Weighted Average      
Range of assumptions used to determine the fair value of warrants      
Measurement input 0.0028    
Risk-free interest rate | Warrants | Black Scholes Option Pricing Method | Minimum      
Range of assumptions used to determine the fair value of warrants      
Measurement input 0.0028 0.0222  
Risk-free interest rate | Warrants | Black Scholes Option Pricing Method | Maximum      
Range of assumptions used to determine the fair value of warrants      
Measurement input 0.0161 0.0249  
Expected volatility of Trovagene common stock | Warrants | Weighted Average      
Range of assumptions used to determine the fair value of warrants      
Measurement input 1.12    
Expected volatility of Trovagene common stock | Warrants | Black Scholes Option Pricing Method | Minimum      
Range of assumptions used to determine the fair value of warrants      
Measurement input 1.11 1.02  
Expected volatility of Trovagene common stock | Warrants | Black Scholes Option Pricing Method | Maximum      
Range of assumptions used to determine the fair value of warrants      
Measurement input 1.12 1.05  
Dividend yield | Warrants | Weighted Average      
Range of assumptions used to determine the fair value of warrants      
Measurement input 0    
Dividend yield | Warrants | Black Scholes Option Pricing Method      
Range of assumptions used to determine the fair value of warrants      
Measurement input 0   0