Quarterly report pursuant to Section 13 or 15(d)

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

v3.21.2
Stockholders' Equity - Summary of information about warrants outstanding (Details) - $ / shares
3 Months Ended 9 Months Ended
May 17, 2021
Oct. 08, 2020
Nov. 30, 2020
May 31, 2021
Warrants Outstanding 247,423      
Exercise price (in dollars per share)       $ 3.07
May 2021 Common Warrants        
Warrants Outstanding       4,948,453
Weighted average Life of Outstanding Warrants in years       5 years
Exercise price (in dollars per share)       $ 2.43
May 2021 Prefunded Warrants        
Warrants Outstanding       2,628,453
Weighted average Life of Outstanding Warrants in years       5 years
Exercise price (in dollars per share) $ 0.0001     $ 0.00
May 2021 Underwriter Warrants        
Warrants Outstanding       247,423
Weighted average Life of Outstanding Warrants in years       5 years 6 months
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 4 months 24 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 4 months 24 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       4 years
Exercise price (in dollars per share)       $ 5.40
May 2020 Underwriter Warrants        
Warrants Outstanding       111,108
Weighted average Life of Outstanding Warrants in years       4 years
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 3 months 18 days
Exercise price (in dollars per share)       $ 10.17
Amended March 2019 Warrants        
Warrants Outstanding       66,288
Weighted average Life of Outstanding Warrants in years       2 years 9 months 18 days
Exercise price (in dollars per share)       $ 40.00
March 2019 Services Warrants        
Warrants Outstanding       3,366
Weighted average Life of Outstanding Warrants in years       2 years 9 months 18 days
Exercise price (in dollars per share)       $ 70.00
June 2018 Notes Warrants        
Warrants Outstanding       6,276
Weighted average Life of Outstanding Warrants in years       2 years 6 months
Exercise price (in dollars per share)       $ 40.00
June 2018 Services Warrants        
Warrants Outstanding       5,422
Weighted average Life of Outstanding Warrants in years       2 years 6 months
Exercise price (in dollars per share)       $ 99.60
2017 PIPE Warrants        
Warrants Outstanding       2,500
Weighted average Life of Outstanding Warrants in years       1 year 1 month 6 days
Exercise price (in dollars per share)       $ 276.00
Warrant [Member]        
Warrants Outstanding     12,220,538  
Weighted average Life of Outstanding Warrants in years     4 years 8 months 12 days  
Exercise price (in dollars per share)       $ 3.02