v3.26.3
Convertible debentures (Details)
1 Months Ended 12 Months Ended
Sep. 30, 2026
USD ($)
shares
Aug. 31, 2026
USD ($)
shares
Jun. 30, 2026
USD ($)
$ / shares
Apr. 30, 2026
USD ($)
$ / shares
Jul. 31, 2025
USD ($)
shares
tranche
$ / shares
Dec. 31, 2023
USD ($)
$ / shares
shares
Oct. 31, 2022
USD ($)
$ / shares
Jun. 30, 2026
USD ($)
$ / shares
shares
Jun. 30, 2025
USD ($)
shares
Jun. 30, 2024
USD ($)
$ / shares
shares
May 31, 2024
USD ($)
$ / shares
shares
Oct. 21, 2022
shares
Convertible debentures                        
Conversion of debts into ordinary shares $ 2,775,000 $ 2,775,000           $ 4,325,000        
Number of shares issued upon conversion | shares 1,148,638 1,148,638           504,534        
Issuance of convertible debentures               40,543,745        
Crypto Asset, Name [Extensible Enumeration]         btog:DogecoinMember     btog:DogecoinMember        
Proceeds from convertible debentures, net of issuance costs               $ 6,435,625   $ 6,127,334    
Aggregate purchase price     $ 17,519,810         17,519,810        
Convertible debentures     10,624,818         10,624,818        
Loss on initial measurement of debt               1,345,530        
Repayments of convertible debt, principal               0        
Accrued interest $ 150,769 $ 150,769           126,415        
Cash paid for interest               613,505 $ 608,712 $ 270,170    
Aggregate fair value carrying amount of the obligations derecognized               4,899,382        
Convertible Debt Issued on October 21, 2022                        
Convertible debentures                        
Aggregate principal amount             $ 2,100,000          
Conversion price (in dollars per share) | $ / shares             $ 99     $ 540    
Maturity term             2 years          
Prepayments in cash                   $ 900,000    
Conversion of debts into ordinary shares                   $ 1,200,000    
Number of shares issued upon conversion | shares                   2,267    
Convertible Debt Issued on December 29, 2023                        
Convertible debentures                        
Aggregate principal amount           $ 6,740,000            
Conversion price (in dollars per share) | $ / shares           $ 4,500            
Prepayments in cash                   $ 960,000    
Number of shares issued upon conversion | shares                   119,737    
Number of warrants | shares           3,569            
Aggregate proceeds           $ 6,127,334            
Maturity date           36 months            
Senior secured convertible notes (the "2025 Notes")                        
Convertible debentures                        
Aggregate principal amount         $ 16,300,000              
Number of traches issued | tranche         3              
Issuance of convertible debentures | shares         40,543,745              
Issuance of convertible debenture in exchange for cryptocurrencies         $ 10,000,000              
Proceeds from convertible debentures, net of issuance costs         $ 4,500,000              
Interest rate (as a percent)         8.25%              
Aggregate purchase price     $ 15,194,810         15,194,810        
Loss on initial measurement of debt               $ 1,164,960        
Maximum borrowing capacity         $ 100,000,000              
Senior Convertible Debentures                        
Convertible debentures                        
Interest rate (as a percent)     8.25%         8.25%        
Loss on initial measurement of debt               $ 1,345,530        
Debt issuance cost incurred               1,100,000        
Cash paid for interest               613,505        
Convertible Debenture and Exchange note issued on May 31, 2024                        
Convertible debentures                        
Aggregate principal amount                     $ 2,000,000  
Number of shares issued upon conversion | shares                 22,257      
Interest rate (as a percent)                     10.00%  
Cancellation of warrants | shares                     500,000  
Cancelled warrants                     $ 71,319  
Average price of ordinary share                     95.00%  
Convertible debt issued on April 16, 2026                        
Convertible debentures                        
Aggregate principal amount       $ 500,000                
Conversion price (in dollars per share) | $ / shares       $ 13.8                
Interest rate (as a percent)       8.25%                
Aggregate purchase price     $ 465,000 $ 465,000       465,000        
Loss on initial measurement of debt               36,070        
Maximum borrowing capacity       5,000,000                
Proceeds from convertible debt       $ 375,000                
Convertible notes issued on June 28, 2026                        
Convertible debentures                        
Aggregate principal amount     $ 2,000,000         $ 2,000,000        
Conversion price (in dollars per share) | $ / shares     $ 1.63         $ 1.63        
Interest rate (as a percent)     8.25%         8.25%        
Aggregate purchase price     $ 1,860,000         $ 1,860,000        
Loss on initial measurement of debt               144,500        
Maximum borrowing capacity     10,000,000         $ 10,000,000        
Proceeds from convertible debt     1,545,000                  
Amount remitted by the purchaser     $ 1,100,000                  
Ordinary shares | Convertible Debt Issued on October 21, 2022                        
Convertible debentures                        
Number of warrants | shares                       2
Minimum | Convertible Debt Issued on October 21, 2022                        
Convertible debentures                        
Interest rate             12.00%          
Minimum | Convertible Debt Issued on December 29, 2023                        
Convertible debentures                        
Interest rate           13.50%            
Minimum | Senior secured convertible notes (the "2025 Notes")                        
Convertible debentures                        
Conversion price (in dollars per share) | $ / shares         $ 90              
Minimum | Convertible Debenture and Exchange note issued on May 31, 2024                        
Convertible debentures                        
Conversion price (in dollars per share) | $ / shares                     $ 228  
Maximum | Senior secured convertible notes (the "2025 Notes")                        
Convertible debentures                        
Conversion price (in dollars per share) | $ / shares         $ 118.5