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Schedule Of Preliminary Allocation of Fair Value Assumptions (Details) - USD ($)
$ in Thousands
Nov. 15, 2021
Apr. 30, 2022
Apr. 30, 2021
Business Acquisition [Line Items]      
Goodwill   $ 8,537
Marine Advanced Robotics, Inc. [Member]      
Business Acquisition [Line Items]      
Total Purchase Consideration $ 11,902    
Cash 12    
Inventory 150    
Property and equipment, net 38    
Trademarks 2,755    
Patents 1,193    
Goodwill 8,537    
Contract liabilities acquired (203)    
Deferred income tax liability (580)    
Net asset acquired $ 11,902