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PRODUCT WARRANTIES (Tables)
 9 Months Ended
Jan. 31, 2026
Product Warranties Disclosures [Abstract]  
Schedule of Product Warranty Liability [Table Text Block] As of January 31, 2026 and April 30, 2025, respectively, changes in the carrying amount of accrued product warranty costs, reported in accrued expenses on the consolidated balance sheets, were as follows (in thousands):
   January 31,
2026		   April 30,
2025		 
Balance at beginning of year  $567   $542 
Warranty costs incurred   (234)   (253)
Product warranty accrual   211    278 
Balance at end of year  $544   $567