Organization and summary of significant accounting policies - Property Plant and Equipment (Details) |
Jan. 31, 2026 |
|---|---|
| Minimum | Buildings | |
| Property, Plant and Equipment [Line Items] | |
| Useful life | 30 years |
| Minimum | Furniture and fixtures | |
| Property, Plant and Equipment [Line Items] | |
| Useful life | 3 years |
| Minimum | Equipment, including software | |
| Property, Plant and Equipment [Line Items] | |
| Useful life | 3 years |
| Maximum | Buildings | |
| Property, Plant and Equipment [Line Items] | |
| Useful life | 40 years |
| Maximum | Leasehold Improvements | |
| Property, Plant and Equipment [Line Items] | |
| Useful life | 10 years |
| Maximum | Furniture and fixtures | |
| Property, Plant and Equipment [Line Items] | |
| Useful life | 10 years |
| Maximum | Equipment, including software | |
| Property, Plant and Equipment [Line Items] | |
| Useful life | 7 years |