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REVENUES - Other revenues (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Oct. 31, 2023
Oct. 31, 2022
Oct. 31, 2023
Oct. 31, 2022
Other revenues        
Oil and gas royalties   $ 49   $ 106
Landscaping revenues $ 314   $ 426  
Miscellaneous other revenues 135 345 252 384
Total $ 449 $ 394 $ 678 $ 490