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Stockholders' Equity (Tables)
12 Months Ended
Dec. 31, 2019
Equity [Abstract]  
Schedule of Stockholders' Equity Note, Warrants or Rights
As of December 31, 2019, there were 35,517,329 warrants outstanding, with a weighted average exercise price of $0.63 per share, and annual expirations as follows:
 
Warrants
Expiring in 2021
1,189,079

Expiring in 2022
343,750

Expiring in 2023
33,645,847

Expiring in 2024
335,453

Expiring in 2025
3,200

 
35,517,329