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Note 2 - Revenue Recognition - Contract Assets and Liabilities (Details) - USD ($)
$ in Thousands
12 Months Ended
May 01, 2021
May 01, 2021
May 02, 2020
Contract assets $ 32,799 $ 32,799 $ 35,467
Contract liabilities - current 64,495 64,495 50,897
Contract liabilities - non-current 10,720 10,720 10,707
Less: reductions for revenue recognized   (46,533)  
Service-type Warranty Contracts [Member]      
Balance at beginning of year 24,490 24,490 24,939
New contracts sold 35,623   41,169
Less: reductions for revenue recognized (36,723)   (41,167)
Foreign currency translation and other 1,200   (451)
Balance at end of year $ 24,590 $ 24,590 $ 24,490