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Note 10 - Fair Value Measurement - Fair Value Hierarchy (Details) - Fair Value, Recurring [Member] - USD ($)
$ in Thousands
Jul. 31, 2021
May 01, 2021
Cash and cash equivalents $ 74,658 $ 77,590
Restricted cash 2,541 2,812
Derivatives - asset position 46 4
Derivatives - liability position (134) (261)
Fair Value, Net Asset (Liability), Total 77,111 79,782
Acquisition-related contingent consideration   (363)
Fair Value, Inputs, Level 1 [Member]    
Cash and cash equivalents 74,658 77,590
Restricted cash 2,541 2,812
Derivatives - asset position 0 0
Derivatives - liability position 0 0
Fair Value, Net Asset (Liability), Total 77,199 80,402
Acquisition-related contingent consideration   0
Fair Value, Inputs, Level 2 [Member]    
Cash and cash equivalents 0 0
Restricted cash 0 0
Derivatives - asset position 46 4
Derivatives - liability position (134) (261)
Fair Value, Net Asset (Liability), Total (88) (257)
Acquisition-related contingent consideration   0
Fair Value, Inputs, Level 3 [Member]    
Cash and cash equivalents 0 0
Restricted cash 0 0
Derivatives - asset position 0 0
Derivatives - liability position 0 0
Fair Value, Net Asset (Liability), Total $ 0 (363)
Acquisition-related contingent consideration   $ (363)