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Warranty Reserves (Tables)
6 Months Ended
Aug. 31, 2021
Product Warranties Disclosures [Abstract]  
Changes in the warranty reserves
The following table shows the changes in the warranty reserves for the six months ended August 31, 2021 (in thousands):
 
Balance at February 28, 2021$4,079 
Warranty costs incurred(357)
Additions charged to income492 
Balance at August 31, 2021$4,214