Quarterly report pursuant to Section 13 or 15(d)

Convertible Preferred Stock and Stockholders' Equity (Deficit) - securities purchase agreement (Details)

v3.21.2
Convertible Preferred Stock and Stockholders' Equity (Deficit) - securities purchase agreement (Details) - USD ($)
Nov. 09, 2020
Jun. 09, 2020
Jun. 04, 2020
May 18, 2020
Jun. 30, 2021
Class of Stock [Line Items]          
Issuance of common stock 236,375     60,250  
June 4th Purchase Agreement          
Class of Stock [Line Items]          
Warrants to purchase shares of Common Stock         2,275,000
Exercise price of warrants         $ 2.55
June 4th Purchase Agreement | Securities Purchase Agreement          
Class of Stock [Line Items]          
Issuance of common stock     2,275,000    
Warrant term     5 years 6 months    
Warrants to purchase shares of Common Stock     2,275,000    
Exercise price of warrants     $ 2.55    
Gross proceeds from offering     $ 5,801,000    
Cash fees paid     $ 464,000    
Cash fees paid percentage     8.00%    
June 9th Purchase Agreement | Securities Purchase Agreement          
Class of Stock [Line Items]          
Issuance of common stock   2,040,000      
Warrant term   5 years 6 months      
Warrants to purchase shares of Common Stock   2,040,000      
Exercise price of warrants   $ 2.61      
Gross proceeds from offering   $ 5,324,000      
Cash fees paid   $ 426,000      
Cash fees paid percentage   8.00%