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Warranty (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jul. 31, 2024
Jul. 31, 2023
Jul. 31, 2024
Jul. 31, 2023
Warranty claim activity        
Beginning balance $ 500 $ 600 $ 500 $ 600
Provision 21 50 51 91
Costs incurred (21) (50) (51) (91)
Ending balance $ 500 $ 600 $ 500 $ 600
Maximum        
Warranty [Line Items]        
Product warranty period     10 years