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Summary of Significant Accounting Policies - Warrants (Details) - shares
Mar. 31, 2022
Oct. 31, 2021
Feb. 28, 2021
Feb. 29, 2020
Warrants        
Common stock that can be purchased with warrants (in shares)     11,250  
Common stock that can be purchased with warrants (in shares) 1,242,813 333,333    
Common stock warrants        
Warrants        
Common stock that can be purchased with warrants (in shares)       35,000