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Summary of significant accounting policies (Details Narrative)
$ in Thousands
12 Months Ended
Sep. 30, 2024
USD ($)
shares
Sep. 30, 2024
CNY (¥)
shares
Sep. 30, 2023
USD ($)
shares
Sep. 30, 2022
USD ($)
shares
Sep. 30, 2021
USD ($)
Oct. 01, 2023
USD ($)
Product Information [Line Items]            
Cumulative-effect adjustment to accumulated deficit           $ 2
Inventory write down   $ 49    
Deferred revenue 6,545   8,913      
Deferred revenue recognized     7,874 12,314 $ 11,678  
Entertainment expense 325   57 147    
Advertising expense 7   2 21    
Employee social benefits 322   $ 258 $ 344    
Underpayment of taxes $ 14,250 ¥ 100,000        
Dilutive income (loss) per share | shares     0 0    
Over-Allotment Option [Member]            
Product Information [Line Items]            
Dilutive income (loss) per share | shares 375,000 375,000        
April 1, 2019 [Member]            
Product Information [Line Items]            
VAT rate 16.00% 16.00%        
Selling Consumer Products [Member]            
Product Information [Line Items]            
VAT rate 13.00% 13.00%        
Service [Member]            
Product Information [Line Items]            
VAT rate 6.00% 6.00%        
Transferred over Time [Member]            
Product Information [Line Items]            
Revenues   $ 1 $ 8    
Transferred at Point in Time [Member]            
Product Information [Line Items]            
Revenues   $ 113,540 $ 120,340