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v3.22.1

Warranty (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Apr. 30, 2022 | Apr. 30, 2021
Warranty claim activity |  |
Beginning balance | $ 600 | $ 700
Provision | 34 | 43
Costs incurred | (34) | (43)
Ending balance | $ 600 | $ 700
Maximum [Member] |  |
Warranty [Line Items] |  |
Product warranty period | 10 years |

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