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Note 10 - Fair Value Measurement - Contingent Liabilities (Details) - Contingent Consideration Liability [Member]
$ in Thousands
3 Months Ended
Jul. 31, 2021
USD ($)
Acquisition-related contingent consideration as of May 1, 2021 $ 363
Additions 33
Settlements (400)
Interest 4
Acquisition-related contingent consideration as of July 31, 2021 $ 0