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Warranty Accrual (Tables)
6 Months Ended
Jul. 31, 2021
Product Warranties Disclosures [Abstract]  
Schedule of Product Warranty Liability The following is a summary of the Company’s warranty-claim activity for the three and six months ended July 31, 2021 and 2020:
 Three Months EndedSix Months Ended
7/31/20217/31/20207/31/20217/31/2020
(in thousands)
Beginning balance$700 $800 $700 $800 
Provision13 (17)56 43 
Costs incurred(13)(33)(56)(93)
Ending balance$700 $750 $700 $750