Accounts receivable (Details - Credit losses) - USD ($) |
3 Months Ended | ||
|---|---|---|---|
Mar. 31, 2026 |
Dec. 31, 2025 |
Sep. 30, 2025 |
|
| Receivables [Abstract] | |||
| Allowance for credit losses, beginning balance | $ 1,974,130 | $ 1,974,130 | $ 1,924,417 |
| Allowance for credit losses | 0 | 0 | 49,713 |
| Allowance for credit losses, ending balance | $ 1,974,130 | $ 1,974,130 | $ 1,974,130 |