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REVENUES - Other revenues (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Jan. 31, 2022
Jan. 31, 2021
Jan. 31, 2022
Jan. 31, 2021
Other revenues        
Sale of buildings     $ 6,750  
Oil and gas royalties $ 48 $ 46 223 $ 82
Public improvement district reimbursements 291 110 530 354
Private infrastructure reimbursement covenants 48 84 131 462
Miscellaneous other revenues 174 406 784 995
Other Revenue, Net $ 561 $ 646 $ 8,418 $ 1,893