Annual report pursuant to Section 13 and 15(d)

Subsequent Events - Additional Information (Detail)

v3.20.2
Subsequent Events - Additional Information (Detail)
1 Months Ended 12 Months Ended
Sep. 15, 2020
$ / shares
shares
Jun. 09, 2020
USD ($)
$ / shares
shares
Jul. 31, 2020
USD ($)
$ / shares
shares
Jun. 30, 2020
USD ($)
$ / shares
shares
Jun. 30, 2019
shares
Jun. 05, 2020
$ / shares
Subsequent Event [Line Items]            
Net proceeds from private placement | $       $ 21,700,000    
Merger costs | $       $ 1,053,697    
Number of options granted       1,291,016 30,000  
Stock options [Member]            
Subsequent Event [Line Items]            
Number of options granted       1,291,016 30,000  
Number of options forfeited       18,750 4,500  
Subsequent Event [Member]            
Subsequent Event [Line Items]            
Warrants exercise price | $ / shares     $ 1.00      
Number of warrants exercised     363,623      
Subsequent Event [Member] | Stock options [Member]            
Subsequent Event [Line Items]            
Number of options forfeited     14,014      
National Brain Tumor Society and National Foundation for Cancer Research [Member] | Subsequent Event [Member]            
Subsequent Event [Line Items]            
Proceeds from debt | $     $ 500,000      
National Brain Tumor Society [Member] | Subsequent Event [Member]            
Subsequent Event [Line Items]            
Warrants issued     125,000      
Warrants exercise price | $ / shares     $ 1.09      
National Brain Tumor Society [Member] | Subsequent Event [Member] | Promissory Note [Member]            
Subsequent Event [Line Items]            
Accrued interest rate     6.00%      
Debt, maturity date     Jun. 19, 2021      
Warrant [Member]            
Subsequent Event [Line Items]            
Warrants exercise price | $ / shares       $ 1.00   $ 3.875
Warrant [Member] | National Brain Tumor Society [Member]            
Subsequent Event [Line Items]            
Warrants exercise price | $ / shares       $ 1.09    
Director [Member] | Stock options [Member]            
Subsequent Event [Line Items]            
Stock option exercise period       90 days    
Director [Member] | Stock options [Member] | Group One [Member]            
Subsequent Event [Line Items]            
Stock option expiry date       Sep. 26, 2020    
Director [Member] | Stock options [Member] | Group Two [Member]            
Subsequent Event [Line Items]            
Stock option expiry date       Nov. 19, 2020    
Director [Member] | Subsequent Event [Member] | Stock options [Member]            
Subsequent Event [Line Items]            
Number of options granted     222,887      
Stock option exercise period     1 year      
Director [Member] | Subsequent Event [Member] | Stock options [Member] | Group One [Member]            
Subsequent Event [Line Items]            
Number of options granted     66,850      
Stock option expiry date     Jun. 26, 2021      
Director [Member] | Subsequent Event [Member] | Stock options [Member] | Group Two [Member]            
Subsequent Event [Line Items]            
Number of options granted     156,037      
Stock option expiry date     Aug. 19, 2021      
Executive Officers and Director [Member] | Subsequent Event [Member] | Stock options [Member]            
Subsequent Event [Line Items]            
Number of options granted 4,698,687          
Stock option exercise price | $ / shares $ 1.70          
Stock option vesting description Of the total granted, 4,218,687 stock options vest as to 1/6 on March 15, 2021 with the remaining portion of the 4,218,687 vesting in equal monthly installments over a period of 30 months commencing on April 15, 2021. In addition, of the total stock options granted, 480,000 vest in 12 equal monthly installments beginning on October 15, 2020. All of the stock options granted have a 10-year term and are subject to cancellation upon the grantees’ termination of service for the Company, with certain exceptions.          
Stock option term 10 years          
Executive Officers and Director [Member] | Subsequent Event [Member] | Stock options [Member] | Group One [Member]            
Subsequent Event [Line Items]            
Number of options expected to vest 4,218,687          
Stock option vesting ratio 0.1667          
Stock option vesting date Mar. 15, 2021          
Stock option vesting period 30 months          
Stock option vesting commencement date Apr. 15, 2021          
Executive Officers and Director [Member] | Subsequent Event [Member] | Stock options [Member] | Group Two [Member]            
Subsequent Event [Line Items]            
Number of options expected to vest 480,000          
Stock option vesting period 12 months          
Stock option vesting commencement date Oct. 15, 2020          
Series C Preferred Stock [Member]            
Subsequent Event [Line Items]            
Conversion of common stock, shares issued   21,516,484        
Series C-1 Preferred Shares [Member]            
Subsequent Event [Line Items]            
Conversion price | $ / shares   $ 1.16        
Series C-2 Preferred Shares [Member]            
Subsequent Event [Line Items]            
Conversion price | $ / shares   1.214        
Series C-3 Preferred Shares [Member]            
Subsequent Event [Line Items]            
Conversion price | $ / shares   $ 1.15        
Merger Agreement [Member]            
Subsequent Event [Line Items]            
Terms and conditions of merger agreement       (the “Effective Time”), (i) each outstanding share of Adgero common stock (the “Adgero Common Stock”) (other than any shares held as treasury stock that will be cancelled) was converted into shares of Company common stock (the “Kintara Common Stock”) based on the exchange ratio, (ii) each outstanding warrant to purchase Adgero Common Stock was converted into a warrant exercisable for that number of shares of Kintara Common Stock equal to the product of (x) the aggregate number of shares of Adgero Common Stock for which such warrant was exercisable and (y) the Exchange Ratio (as defined in the Merger Agreement); and (iii) each outstanding Adgero stock option, whether vested or unvested, that had not been exercised was cancelled for no consideration. On August 19, 2020, upon the terms and subject to the conditions set forth in the Merger Agreement, Merger Sub merged with and into Adgero, the separate corporate existence of Merger Sub ceased and Adgero continued its existence under Delaware law as the surviving corporation and a direct, wholly-owned subsidiary of the Company.    
Voting power after effective time   49.50%        
Voting power prior to effective time   50.50%        
Final exchange ratio prior to effective time   157.40%        
Stock purchase warrants   2,313,908        
Warrants exercisable price | $ / shares   $ 3.18        
Merger costs | $       $ 1,053,697    
Merger Agreement [Member] | Series C Preferred Stock [Member]            
Subsequent Event [Line Items]            
Shares issued, price per share | $ / shares   $ 1,000        
Shares issued of common stock for services   25,028        
Total gross proceeds | $   $ 25,000,000        
Net proceeds from private placement | $   $ 21,700,000        
Issue of shares   25,028        
Merger Agreement [Member] | Series C Preferred Stock [Member] | Placement Agent [Member] | Warrant [Member]            
Subsequent Event [Line Items]            
Issue of shares   2,504        
Merger Agreement [Member] | Private Placement [Member] | Series C Preferred Stock [Member]            
Subsequent Event [Line Items]            
Shares issued, price per share | $ / shares   $ 1,000        
Deferred financing costs | $       $ 84,944    
Merger Agreement [Member] | Private Placement [Member] | Series C Preferred Stock [Member] | First Anniversary [Member]            
Subsequent Event [Line Items]            
Common stock dividends percentage   10.00%        
Merger Agreement [Member] | Private Placement [Member] | Series C Preferred Stock [Member] | Second Anniversary [Member]            
Subsequent Event [Line Items]            
Common stock dividends percentage   15.00%        
Merger Agreement [Member] | Private Placement [Member] | Series C Preferred Stock [Member] | Third Anniversary [Member]            
Subsequent Event [Line Items]            
Common stock dividends percentage   20.00%        
Merger Agreement [Member] | Private Placement [Member] | Series C Preferred Stock [Member] | Fourth Anniversary [Member]            
Subsequent Event [Line Items]            
Common stock dividends percentage   25.00%        
Merger Agreement [Member] | Private Placement [Member] | Series C Preferred Stock [Member] | Placement Agent [Member]            
Subsequent Event [Line Items]            
Merger, stock purchase warrants as percentage of value of shares issued   10.00%        
Merger Agreement [Member] | Common Stock [Member]            
Subsequent Event [Line Items]            
Number of shares issued   11,439,013        
Merger Agreement [Member] | Common Stock [Member] | Private Placement [Member]            
Subsequent Event [Line Items]            
Merger success fee   571,951