v3.26.1
Segment information (Details) - USD ($)
 6 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Segment Reporting [Line Items]    
Total revenues $ 2,329,460 $ 8,748,945
Total cost of revenues 2,017,374 8,260,142
Total gross profit 312,086 488,803
Total revenues 2,329,460 8,748,945
Projects [Member]    
Segment Reporting [Line Items]    
Total revenues 1,333,893 8,148,629
Total cost of revenues 1,199,323 7,743,337
Total gross profit 134,570 405,292
Products [Member]    
Segment Reporting [Line Items]    
Total revenues 807,945 471,144
Total cost of revenues 652,795 400,783
Total gross profit 155,150 70,361
Services [Member]    
Segment Reporting [Line Items]    
Total revenues 187,622 129,172
Total cost of revenues 165,256 116,022
Total gross profit 22,366 13,150
Over Time [Member]    
Segment Reporting [Line Items]    
Total revenues 1,333,893 8,148,629
Point In Time [Member]    
Segment Reporting [Line Items]    
Total revenues $ 995,567 $ 600,316