Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Subsequent events - Additional Information (Detail)

v3.20.1
Subsequent events - Additional Information (Detail)
 1 Months Ended 12 Months Ended
Mar. 25, 2020
USD ($)
$ / shares
shares
Jan. 28, 2020
shares
$ / shares
Jan. 03, 2020
USD ($)
$ / shares
shares
Aug. 29, 2019
USD ($)
shares
Dec. 31, 2019
USD ($)
shares
Dec. 31, 2018
USD ($)
Dec. 23, 2019
USD ($)
shares
Disclosure of non-adjusting events after reporting period [line items]              
Common stock value outstanding         $ 194,859,415 $ 170,502,394  
Weighted average remaining contractual life of outstanding share options         5 years 3 months 25 days    
Amount allocated to common shares         $ 7,002,043 59,998  
Cash commission         1,136,146 $ 785,128  
Aspire Agreement [Member]              
Disclosure of non-adjusting events after reporting period [line items]              
Gross proceeds from offerings         3,000,000    
Cash commission         $ 417,113    
Aspire Agreement [Member] | Aspire Capital Fund LLC [Member]              
Disclosure of non-adjusting events after reporting period [line items]              
Capital Issued Commitments       $ 35,000,000     $ 35,000,000
Shares issued | shares | shares       1,777,325 7,784,444   973,000
Gross proceeds from offerings       $ 3,000,000      
Events After Reporting Period [member]              
Disclosure of non-adjusting events after reporting period [line items]              
Number of share options granted in share-based payment arrangement | shares   25,765          
Weighted average remaining contractual life of outstanding share options   7 years          
Weighted average exercise price of share options granted in share-based payment arrangement | $ / shares   $ 0.657          
Events After Reporting Period [member] | Cambridge Design Partnership Limited [Member]              
Disclosure of non-adjusting events after reporting period [line items]              
Common stock shares issued for consideration other than cash | shares     501,148        
Price per share | $ / shares     $ 0.50        
Common stock value outstanding     $ 250,574        
Events After Reporting Period [member] | Institutional investors [member]              
Disclosure of non-adjusting events after reporting period [line items]              
Shares issued | shares | shares 7,000,000            
Gross proceeds from offerings $ 1.2            
Share price | $ / shares $ 0.17            
Number of warrants to purchase common stock | shares 3,500,000            
Net proceeds from offering $ 0.885            
Exercise price per share | $ / shares $ 0.19            
Warrants expiration period 5 years            
Fair value of warrants $ 618,100            
Amount allocated to common shares $ 571,900            
Events After Reporting Period [member] | Wainwright [Member]              
Disclosure of non-adjusting events after reporting period [line items]              
Number of warrants to purchase common stock | shares 490,000            
Exercise price per share | $ / shares $ 0.2125            
Cash commission $ 83,300            
Warrants expiration period Mar. 25, 2025