| Note 8 - Property and Equipment (Details Textual) - USD ($) $ in Millions | 4 Months Ended | 5 Months Ended | 7 Months Ended | 8 Months Ended | 12 Months Ended | 
|---|---|---|---|---|---|
| Jun. 11, 2021 | Jan. 31, 2021 | Aug. 27, 2020 | Jan. 31, 2022 | Jan. 31, 2023 | |
| Depreciation, Total | $ 1.8 | $ 2.3 | $ 2.7 | $ 4.2 | $ 5.0 | 
| X | ||||||||||
| 
- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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