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Commitments and Contingencies - Additional Information (Detail) - USD ($)
 1 Months Ended 12 Months Ended
Aug. 31, 2017
Jun. 30, 2020
Jun. 30, 2019
Purchase Commitment, Excluding Long-term Commitment [Line Items]      
Future aggregate milestone payments   $ 75,200,000  
Percentage of Purchase Requirement   100.00%  
Common stock value  
Phase Three Clinical Trial      
Purchase Commitment, Excluding Long-term Commitment [Line Items]      
First milestone payment $ 200,000    
Common stock value $ 166,527    
Issuance of common stock to purchase asset, shares | shares 500,000    
S*Bio Purchase Agreement      
Purchase Commitment, Excluding Long-term Commitment [Line Items]      
Accrued payment for potential future payments   0  
CyDex License Agreement      
Purchase Commitment, Excluding Long-term Commitment [Line Items]      
Accrued payment for potential future payments   0  
Presage License Agreement      
Purchase Commitment, Excluding Long-term Commitment [Line Items]      
Accrued payment for potential future payments   $ 0