Quarterly report pursuant to Section 13 or 15(d)

Warrants and Derivative Liabilities - Schedule of Warrants Vested and Outstanding (Details)

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Warrants and Derivative Liabilities - Schedule of Warrants Vested and Outstanding (Details)
 6 Months Ended
Jun. 30, 2023
$ / shares
shares
Class of Warrant or Right [Line Items]  
Exercise price (in dollars per share) | $ / shares $ 0.10
Number of Warrants Vested and Outstanding (in shares) | shares 153,848,014
2015 Common Stock Warrants  
Class of Warrant or Right [Line Items]  
Exercise price (in dollars per share) | $ / shares $ 5.00
Weighted Average Remaining Contractual Term (Years) 1 year 9 months 25 days
Number of Warrants Vested and Outstanding (in shares) | shares 100,000
2016 Common Stock Warrants to Service Providers  
Class of Warrant or Right [Line Items]  
Exercise price (in dollars per share) | $ / shares $ 1.15
Weighted Average Remaining Contractual Term (Years) 3 years 4 months 2 days
Number of Warrants Vested and Outstanding (in shares) | shares 40,000
2019 Common Stock Warrants  
Class of Warrant or Right [Line Items]  
Exercise price (in dollars per share) | $ / shares $ 0.35
Weighted Average Remaining Contractual Term (Years) 1 year 4 months 24 days
Number of Warrants Vested and Outstanding (in shares) | shares 8,000,000
2020 Common Stock Warrants to Placement Agent  
Class of Warrant or Right [Line Items]  
Exercise price (in dollars per share) | $ / shares $ 0.08
Weighted Average Remaining Contractual Term (Years) 2 years 1 month 2 days
Number of Warrants Vested and Outstanding (in shares) | shares 8,166,667
2021 Inducement Warrants  
Class of Warrant or Right [Line Items]  
Exercise price (in dollars per share) | $ / shares $ 0.15
Weighted Average Remaining Contractual Term (Years) 3 years 25 days
Number of Warrants Vested and Outstanding (in shares) | shares 21,166,667
2021 Inducement Warrants to Placement Agent  
Class of Warrant or Right [Line Items]  
Exercise price (in dollars per share) | $ / shares $ 0.19
Weighted Average Remaining Contractual Term (Years) 3 years 25 days
Number of Warrants Vested and Outstanding (in shares) | shares 1,481,667
2021 Common Stock Warrants  
Class of Warrant or Right [Line Items]  
Exercise price (in dollars per share) | $ / shares $ 0.09
Weighted Average Remaining Contractual Term (Years) 3 years 3 months
Number of Warrants Vested and Outstanding (in shares) | shares 77,777,779
2021 Common Stock Warrants to Placement Agent  
Class of Warrant or Right [Line Items]  
Exercise price (in dollars per share) | $ / shares $ 0.11
Weighted Average Remaining Contractual Term (Years) 3 years 3 months
Number of Warrants Vested and Outstanding (in shares) | shares 5,444,445
2022 Common Stock Warrants to Service Provider  
Class of Warrant or Right [Line Items]  
Exercise price (in dollars per share) | $ / shares $ 0.04
Weighted Average Remaining Contractual Term (Years) 9 months 3 days
Number of Warrants Vested and Outstanding (in shares) | shares 2,000,000
November 2019 EHT Common Stock Warrants  
Class of Warrant or Right [Line Items]  
Exercise price (in dollars per share) | $ / shares $ 0.29
Weighted Average Remaining Contractual Term (Years) 1 year 5 months 1 day
Number of Warrants Vested and Outstanding (in shares) | shares 8,552,630
November 2019 EHT Common Stock Warrants  
Class of Warrant or Right [Line Items]  
Exercise price (in dollars per share) | $ / shares $ 0.15
Weighted Average Remaining Contractual Term (Years) 1 year 6 months
Number of Warrants Vested and Outstanding (in shares) | shares 945,750
December 2019 EHT Common Stock Warrants  
Class of Warrant or Right [Line Items]  
Exercise price (in dollars per share) | $ / shares $ 0.15
Weighted Average Remaining Contractual Term (Years) 1 year 7 months 9 days
Number of Warrants Vested and Outstanding (in shares) | shares 20,172,409