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Note 5 - Accounts Receivable, Net, Contract Asset and Contract Liability - Accounts Receivable, Net, Contract Asset and Contract Liability (Details) - USD ($)
$ in Thousands
Jul. 31, 2021
Apr. 30, 2021
Accounts Receivable, net $ 2,957 $ 1,961
Contract Asset 578 421
Contract Liability $ 2,804 $ 5,798