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Convertible bonds (Details Narrative) - Convertible Bonds [Member]
¥ / shares in Units, $ in Thousands, ¥ in Millions
1 Months Ended 12 Months Ended
Jan. 31, 2020
USD ($)
shares
Jan. 31, 2020
CNY (¥)
shares
Sep. 30, 2019
USD ($)
shares
Sep. 30, 2019
CNY (¥)
shares
Sep. 30, 2024
USD ($)
Sep. 30, 2023
USD ($)
Sep. 30, 2022
USD ($)
Sep. 30, 2020
Jan. 31, 2020
CNY (¥)
¥ / shares
Sep. 30, 2019
CNY (¥)
¥ / shares
Short-Term Debt [Line Items]                    
Convertible debt $ 4,656   $ 78           ¥ 30.0 ¥ 0.5
Debt instrument interest rate stated percentage 1.20%   0.02%           1.20% 0.02%
Proceeds from issuance of debt $ 4,734 ¥ 30.5 $ 4,734 ¥ 30.5            
Issuance cost net                  
Debt instrument, maturity date Jun. 30, 2020 Jun. 30, 2020 Sep. 23, 2020 Sep. 23, 2020            
Converted into ordinary shares | shares 462,852 462,852 10,419 10,419            
Debt instrument convertible conversion price | ¥ / shares                 ¥ 64.82 ¥ 47.99
Debt instrument principal amounts         $ 4,346 $ 4,180        
Unpaid interest of convertible debt         4,414 3,207        
Debt instrument accrued interest         $ 1,051 $ 1,065 $ 1,134      
Minimum [Member]                    
Short-Term Debt [Line Items]                    
Debt instrument interest rate stated percentage 8.00%   8.00%           8.00% 8.00%
Maximum [Member]                    
Short-Term Debt [Line Items]                    
Debt instrument interest rate stated percentage 24.00%             24.00% 24.00%