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Warranties (Tables)
6 Months Ended
Jul. 31, 2020
Product Warranties Disclosures [Abstract]  
Warranties Changes in the warranty accrual were as follows:
Three Months EndedSix Months Ended
July 31,
2020
July 31,
2019
July 31,
2020
July 31,
2019
Beginning balance$1,606 $1,391 $2,019 $890 
Change in provision
497 1,032 1,000 1,854 
Settlements made
(494)(684)(1,410)(1,005)
Ending balance$1,609 $1,739 $1,609 $1,739