Note 10 - Revenue - Deferred Contract Acquisition Costs (Details) $ in Thousands  | 
6 Months Ended | 
|---|---|
| 
 Jul. 31, 2024  
USD ($) 
 | |
| Deferred contract acquisition costs as of January 31, 2024 | $ 36,667 | 
| Contract acquisition costs | 8,110 | 
| Recognition of contract acquisition costs | (11,130) | 
| Deferred contract acquisition costs as of July 31, 2024 | $ 33,647 | 
| X | ||||||||||
- Definition Amount of increase to asset recognized from cost incurred to obtain or fulfill contract with customer. No definition available. 
  | 
| X | ||||||||||
- Definition Amount of amortization expense for asset recognized from cost incurred to obtain or fulfill contract with customer. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
  | 
| X | ||||||||||
- Definition Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
  |