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Stockholders' Equity (Tables)
3 Months Ended
Mar. 31, 2020
Equity [Abstract]  
Schedule of Warrant Activity
As of March 31, 2020, there were 36,272,500 warrants outstanding, with a weighted average exercise price of $0.56 per share, and annual expirations as follows:

Expiring in 2021343,750  
Expiring in 2022—  
Expiring in 2023
33,645,847  
Expiring in 2024335,453  
Expiring thereafter1,947,450  
Total36,272,500