4. BITCOIN - Company's Bitcoin Holdings (Details) - USD ($) $ in Thousands |
Mar. 31, 2026 |
Sep. 30, 2025 |
|---|---|---|
| Common Domain Members [Abstract] | ||
| Number Of Bitcoins Held | $ 11,920 | $ 10,428 |
| Cost basis - per bitcoin | 97,309 | 105,025 |
| Fair value - per bitcoin | 68,222 | 114,068 |
| Cost basis of bitcoin (in '000s) | 1,159,953 | 1,095,151 |
| Fair value of bitcoin (in '000s) | $ 813,221 | $ 1,189,443 |