Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events (Details)

v3.23.4
Subsequent Events (Details)
 1 Months Ended 3 Months Ended 6 Months Ended
Jan. 03, 2024
director
$ / shares
shares
Dec. 07, 2023
USD ($)
$ / shares
Dec. 31, 2023
USD ($)
$ / shares
shares
Aug. 31, 2023
USD ($)
Jul. 31, 2023
USD ($)
$ / shares
shares
Nov. 30, 2023
USD ($)
$ / shares
Sep. 30, 2023
USD ($)
$ / shares
shares
Jun. 30, 2023
USD ($)
$ / shares
shares
Nov. 30, 2023
USD ($)
$ / shares
shares
Nov. 30, 2022
USD ($)
Jun. 30, 2022
$ / shares
Subsequent Event [Line Items]                      
Warrants to purchase common shares, shares             21,500,000        
Term of warrants             5 years        
Exercise price of share | $ / shares         $ 0.306   $ 0.50 $ 0.306     $ 0.50
Placement agent fees and expenses | $             $ 400,000        
Stock issued for private offerings | $           $ 6,328,000          
Convertible note, redeemed amount | $                 $ 2,000,000 $ 500,000  
Minimum                      
Subsequent Event [Line Items]                      
Exercise price of share | $ / shares           $ 0.10     $ 0.10    
Placement agent notes                      
Subsequent Event [Line Items]                      
Debt Instrument Term               18 months      
Convertible note, aggregate principal | $               $ 2,300,000      
Notes issuance costs | $               200,000      
Proceeds from sale of notes | $               $ 1,100,000      
Partitioned Notes                      
Subsequent Event [Line Items]                      
Convertible note, aggregate principal | $           $ 2,000,000.0     $ 2,000,000.0    
Long-term Convertible Note - April 2, 2021 Note                      
Subsequent Event [Line Items]                      
Convertible note, aggregate principal | $                   $ 4,100,000  
Conversion of preferred stock to common stock (in shares)                 12,200,000    
Placement Agent Warrants Issue One | Placement agent notes                      
Subsequent Event [Line Items]                      
Warrants to purchase common shares, shares               1,300,000      
Term of warrants               3 years      
Exercise price of share | $ / shares               $ 0.50      
Placement Agent Warrants Issue Two | Placement agent notes                      
Subsequent Event [Line Items]                      
Warrants to purchase common shares, shares               400,000      
Term of warrants               10 years      
Exercise price of share | $ / shares               $ 0.26      
Accredited Investors                      
Subsequent Event [Line Items]                      
Warrants to purchase common shares, shares             21,500,000        
Stock issued for private offerings | $             $ 3,000,000.0        
Accredited Investors | Placement agent notes                      
Subsequent Event [Line Items]                      
Convertible note, redeemed amount | $         $ 2,300,000            
Warrants issued in debt conversion         14,300,000            
Allotment to placement agent                      
Subsequent Event [Line Items]                      
Warrants to purchase common shares, shares             3,200,000        
Term of warrants             10 years        
Exercise price of share | $ / shares             $ 0.16        
Placement agent fees and expenses | $       $ 5,000,000 $ 5,000,000            
Subsequent Event                      
Subsequent Event [Line Items]                      
Warrants to purchase common shares, shares     7,200,000                
Exercise price of share | $ / shares     $ 0.14                
Placement agent fees and expenses | $     $ 200,000                
Warrant covering common stock shares purchased, percentage     13.00%                
Subsequent Event | 2012 Equity Incentive Plan                      
Subsequent Event [Line Items]                      
Nonqualified stock options granted 10,750,779                    
Stock option granted, exercise price | $ / shares $ 0.21                    
Number of directors, granted | director 5                    
Number of nonqualified options cancelled 4,060,779                    
Remaining nonqualified options outstanding 6,690,000                    
Term of nonqualified options granted 10 years                    
Subsequent Event | 2012 Equity Incentive Plan | Maximum                      
Subsequent Event [Line Items]                      
Exercise price of nonqualified options cancelled | $ / shares $ 5.57                    
Subsequent Event | 2012 Equity Incentive Plan | Minimum                      
Subsequent Event [Line Items]                      
Exercise price of nonqualified options cancelled | $ / shares $ 0.41                    
Subsequent Event | 2012 Equity Incentive Plan | Nonemployee | Managing Director                      
Subsequent Event [Line Items]                      
Nonqualified stock options granted 4,000,000                    
Subsequent Event | 2012 Equity Incentive Plan | Employee | Executive Officer [Member]                      
Subsequent Event [Line Items]                      
Nonqualified stock options granted 2,980,222                    
Number of executive officers to whom nonqualified stock options granted | director 2                    
Subsequent Event | 2012 Equity Incentive Plan | Employee | Non-Executive Employees [Member]                      
Subsequent Event [Line Items]                      
Nonqualified stock options granted 3,770,557                    
Subsequent Event | Partitioned Notes                      
Subsequent Event [Line Items]                      
Convertible note, aggregate principal | $     $ 1,300,000                
Subsequent Event | Long-term Convertible Note - April 2, 2021 Note                      
Subsequent Event [Line Items]                      
Conversion of preferred stock to common stock (in shares)     8,300,000                
Subsequent Event | Short Term Notes                      
Subsequent Event [Line Items]                      
Debt Instrument Term     6 months                
Convertible note, aggregate principal | $     $ 800,000                
Notes issuance costs | $   $ 100,000                  
Proceeds from sale of notes | $   $ 700,000                  
Subsequent Event | Placement Agent Warrants Issue One                      
Subsequent Event [Line Items]                      
Exercise price of share | $ / shares     $ 0.35                
Number of shares     7,200,000                
Percent of unit pricing in offering     80.00%                
Subsequent Event | Placement Agent Warrants Issue One | Short Term Notes                      
Subsequent Event [Line Items]                      
Warrants to purchase common shares, shares     800,000                
Term of warrants     5 years                
Exercise price of share | $ / shares     $ 0.35                
Subsequent Event | Placement Agent Warrants Issue Two | Short Term Notes                      
Subsequent Event [Line Items]                      
Warrants to purchase common shares, shares     400,000                
Term of warrants     10 years                
Exercise price of share | $ / shares   $ 0.35                  
Subsequent Event | Private placement warrants                      
Subsequent Event [Line Items]                      
Warrants to purchase common shares, shares     10,300,000                
Term of warrants     5 years                
Exercise price of share | $ / shares     $ 0.35                
Subsequent Event | Accredited Investors                      
Subsequent Event [Line Items]                      
Stock issued for private offerings (in shares)     10,300,000                
Stock issued for private offerings | $     $ 1,500,000                
Subsequent Event | Allotment to placement agent                      
Subsequent Event [Line Items]                      
Warrants to purchase common shares, shares     1,500,000                
Term of warrants     10 years                
Exercise price of share | $ / shares     $ 0.17                
Placement agent fees and expenses | $     $ 5,000.0                
Warrant covering common stock shares purchased, percentage     15.00%                
Subsequent Event | Second Private Placement                      
Subsequent Event [Line Items]                      
Number of common shares in a fixed combination issue of shares     1                
Number of warrants in a fixed combination issue of securities     1                
Exercise price of stock warrant combo, per share | $ / shares     $ 0.17                
Closing share price (as percentage)     90.00%