Note 8 - Leases, Commitments and Contingencies (Details Textual) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended | |
|---|---|---|---|
Apr. 30, 2023 |
Apr. 30, 2022 |
Jan. 31, 2023 |
|
| Operating Lease, Weighted Average Discount Rate, Percent | 5.70% | 5.50% | |
| Operating Lease, Weighted Average Remaining Lease Term (Year) | 6 years | 6 years | |
| Lease, Cost | $ 1,400 | $ 2,300 | |
| Lease Payments | $ 1,300 | $ 2,300 | |
| Short-Term Lease, Cost | $ 0 | ||
| Legal Proceedings and Claims [Member] | |||
| Loss Contingency Accrual, Ending Balance | 0 | ||
| Indemnifications or Commitments [Member] | |||
| Loss Contingency Accrual, Ending Balance | 0 | ||
| Loss Contingency, Loss in Period | $ 0 | ||
| Minimum [Member] | |||
| Lessee, Operating Lease, Remaining Lease Term (Year) | 1 year | ||
| Maximum [Member] | |||
| Lessee, Operating Lease, Remaining Lease Term (Year) | 10 years | ||
| X | ||||||||||
- Definition Amount of cash outflow from operating and finance leases. No definition available.
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| X | ||||||||||
- Definition Amount of lease cost recognized by lessee for lease contract. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Remaining lease term of operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of loss contingency liability. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount of loss pertaining to the specified contingency that was charged against earnings in the period, including the effects of revisions in previously reported estimates. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Weighted average discount rate for operating lease calculated at point in time. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of short-term lease cost, excluding expense for lease with term of one month or less. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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