Supplemental financial statement information - Narrative (Details) - USD ($) $ in Millions |
3 Months Ended | ||
|---|---|---|---|
Apr. 30, 2026 |
Apr. 30, 2025 |
Jan. 31, 2026 |
|
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | |||
| Depreciation expense | $ 0.5 | $ 0.7 | |
| Remaining performance obligation | 5.0 | $ 6.7 | |
| Revenue recognition | $ 3.1 | ||
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-05-01 | |||
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | |||
| Remaining performance obligation, percentage (as a percent) | 88.00% | ||
| Revenue, remaining performance obligation, expected timing of satisfaction, period | 12 months | ||
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-05-01 | |||
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | |||
| Revenue, remaining performance obligation, expected timing of satisfaction, period | |||