Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Summary of information about warrants outstanding (Details)

v3.21.2
Stockholders' Equity - Summary of information about warrants outstanding (Details) - $ / shares
12 Months Ended
Oct. 08, 2020
Aug. 31, 2021
Aug. 31, 2020
Exercise price (in dollars per share)   $ 2.61 $ 5.30
May 2021 Common Warrants      
Warrants Outstanding   4,948,453  
Weighted average Life of Outstanding Warrants in years   4 years 9 months 18 days  
Exercise price (in dollars per share)   $ 2.43  
May 2021 Underwriter Warrants      
Warrants Outstanding   247,423  
Weighted average Life of Outstanding Warrants in years   4 years 2 months 12 days  
Exercise price (in dollars per share)   $ 2.67  
October 2020 Common Warrants      
Warrants Outstanding 200,000 2,300,000  
Weighted average Life of Outstanding Warrants in years   4 years 1 month 6 days  
Exercise price (in dollars per share)   $ 3.30  
October 2020 Underwriter Warrants      
Warrants Outstanding   200,000  
Weighted average Life of Outstanding Warrants in years   4 years 1 month 6 days  
Exercise price (in dollars per share)   $ 3.30  
May 2020 Common Warrants      
Warrants Outstanding   1,277,580  
Weighted average Life of Outstanding Warrants in years   3 years 9 months 18 days  
Exercise price (in dollars per share)   $ 5.40  
May 2020 Underwriter Warrants      
Warrants Outstanding   111,108  
Weighted average Life of Outstanding Warrants in years   3 years 9 months 18 days  
Exercise price (in dollars per share)   $ 5.40  
March 2020 Exchange Warrants.      
Warrants Outstanding   423,669  
Weighted average Life of Outstanding Warrants in years   4 years 1 month 6 days  
Exercise price (in dollars per share)   $ 10.17  
Amended March 2019 Notes Warrants [Member]      
Warrants Outstanding   66,288  
Weighted average Life of Outstanding Warrants in years   2 years 6 months  
Exercise price (in dollars per share)   $ 40.00  
March 2019 Services Warrants [Member]      
Warrants Outstanding   3,366  
Weighted average Life of Outstanding Warrants in years   2 years 6 months  
Exercise price (in dollars per share)   $ 70.00  
June 2018 Notes Warrants [Member]      
Warrants Outstanding   6,276  
Weighted average Life of Outstanding Warrants in years   2 years 3 months 18 days  
Exercise price (in dollars per share)   $ 40.00  
June 2018 Services Warrants [Member]      
Warrants Outstanding   5,422  
Weighted average Life of Outstanding Warrants in years   2 years 3 months 18 days  
Exercise price (in dollars per share)   $ 99.60  
2017 PIPE Warrants [Member]      
Warrants Outstanding   2,500  
Weighted average Life of Outstanding Warrants in years   1 year  
Exercise price (in dollars per share)   $ 276.00  
Warrants [Member]      
Warrants Outstanding   9,592,085  
Weighted average Life of Outstanding Warrants in years   4 years 4 months 24 days  
Exercise price (in dollars per share)   $ 3.84