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Deficit (Tables)
6 Months Ended
Jun. 30, 2022
Equity [Abstract]  
Summary of Outstanding Warrants

The following is a summary of such outstanding warrants at June 30, 2022:

    Warrant Outstanding    Warrant Currently Exercisable    Exercise Price per Share    
   Common Shares    
   Total   Currently Exercisable   Exercise Price per Share   Expiration Date
                
Warrants related to March 2018 financing   7,331    7,331   $245.84   September 9, 2023
Warrants related to March 2018 financing   513    513   $340.73   March 6, 2023
Warrants related to July 2018 financing   119,241    119,241   $75.48   July 25, 2023
Warrants related to July 2018 financing   7,154    7,154   $94.35   July 25, 2023
Warrants related to May 2019 financing   5,518    5,518   $26.96   May 23, 2024
Warrants related to October 2019 financing   100,719    100,719   $5.39   October 10, 2024
Warrants related to October 2019 financing   14,336    14,336   $6.74   October 8, 2024
Warrants issued by AIU that after the merger (described below)   3,281,508    3,281,508   $5.00   November 15, 2029
Warrants issued by AIU for consultant   500,000    500,000   $11.00   August 10, 2026