Quarterly report pursuant to Section 13 or 15(d)

Registered Direct Equity Offerings - Additional Information (Detail)

v3.20.1
Registered Direct Equity Offerings - Additional Information (Detail) - USD ($)
 6 Months Ended
Dec. 23, 2019
Dec. 13, 2019
Dec. 09, 2019
Dec. 06, 2019
Nov. 30, 2019
Stockholders Equity Note [Line Items]          
Warrants to purchase common shares, shares         200,000
Class of warrants, exercise price         $ 0.45
Proceeds from issuance of common shares       $ 30.023  
Placement Agent          
Stockholders Equity Note [Line Items]          
Warrants to purchase common shares, shares         655,305
Term of warrants         5 years
Percentage of shares, issued as warrants         1.30%
Placement Agent | Minimum          
Stockholders Equity Note [Line Items]          
Class of warrants, exercise price         $ 0.40
Placement Agent | Maximum          
Stockholders Equity Note [Line Items]          
Class of warrants, exercise price         $ 0.444
Subscription Agreements          
Stockholders Equity Note [Line Items]          
Number of shares to be sold 14,754,098 2,433,333 2,568,330   19,100,333
Purchase price, per share $ 0.305 $ 0.30 $ 0.30    
Warrants to purchase common shares, shares 7,377,049       11,987,250
Class of warrants, exercise price         $ 0.45
Term of warrants         5 years
Proceeds from issuance of common shares $ 4,500,000       $ 6,300,000
Subscription Agreements | Minimum          
Stockholders Equity Note [Line Items]          
Purchase price, per share         $ 0.30
Subscription Agreements | Maximum          
Stockholders Equity Note [Line Items]          
Purchase price, per share         $ 0.40
2019 Subscription Agreement          
Stockholders Equity Note [Line Items]          
Warrants to purchase common shares, shares   1,825,000 1,926,248    
Class of warrants, exercise price   $ 0.45 $ 0.45    
Term of warrants   5 years 5 years    
Proceeds from issuance of common shares   $ 730,000 $ 750,000    
Related party Entity [Member] | Definitive Subscription Agreement [Member]          
Stockholders Equity Note [Line Items]          
Minority interest amount 500,000        
Phoenixus AG [Member]          
Stockholders Equity Note [Line Items]          
Minority interest amount $ 4,000,000