Quarterly report pursuant to Section 13 or 15(d)

Warrants - Preferred stock and common stock outstanding (Details)

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Warrants - Preferred stock and common stock outstanding (Details) - $ / shares
Sep. 30, 2021
Dec. 31, 2020
Class of Warrant or Right [Line Items]    
Shares Issuable Upon Exercise of Warrant 14,325,000 1,938,096
March 17, 2014    
Class of Warrant or Right [Line Items]    
Contractual Term   10 years
Shares Issuable Upon Exercise of Warrant   94,500
Warrants exercise price   $ 0.24
September 28, 2016    
Class of Warrant or Right [Line Items]    
Contractual Term   10 years
Shares Issuable Upon Exercise of Warrant   1,015,401
Warrants exercise price   $ 0.003
July 5, 2017    
Class of Warrant or Right [Line Items]    
Contractual Term   10 years
Shares Issuable Upon Exercise of Warrant   141,750
Warrants exercise price   $ 0.24
February 12, 2019    
Class of Warrant or Right [Line Items]    
Contractual Term   10 years
Shares Issuable Upon Exercise of Warrant   28,350
Warrants exercise price   $ 0.24
March 30, 2020    
Class of Warrant or Right [Line Items]    
Contractual Term   10 years
Shares Issuable Upon Exercise of Warrant   280,095
Warrants exercise price   $ 0.40
December 3, 2020    
Class of Warrant or Right [Line Items]    
Contractual Term   10 years
Shares Issuable Upon Exercise of Warrant   378,000
Warrants exercise price   $ 0.42
July 16, 2021    
Class of Warrant or Right [Line Items]    
Contractual Term 5 years  
Shares Issuable Upon Exercise of Warrant 14,325,000  
Warrants exercise price $ 11.50