DEBT - Schedule of Debt (Details) - USD ($) $ in Thousands	Apr. 30, 2025	Apr. 30, 2024
Debt Instrument [Line Items]
Line of credit, current	$ 0	$ 0
Long-term debt, gross	35,321	38,346
Less: Origination fees	164	236
Long-term debt	35,157	38,110
Less: Current maturities, net of origination fees	5,287	4,866
Long-term debt, excluding current maturities	29,870	33,244
Note Collateralized by Single Aircraft Due November 2029
Debt Instrument [Line Items]
Long-term debt, gross	1,922	0
Note Collateralized by Real Estate Due March 2029
Debt Instrument [Line Items]
Long-term debt, gross	627	787
Note Collateralized by Aircraft Security Agreement
Debt Instrument [Line Items]
Long-term debt, gross	720	887
Note Collateralized by Equipment Due April 2027
Debt Instrument [Line Items]
Long-term debt, gross	24	34
Line of Credit
Debt Instrument [Line Items]
Line of credit, current	0	0
Notes Collateralized by BHCMC's Assets and Compensation Due under State Management Contract Due December 2027
Debt Instrument [Line Items]
Long-term debt, gross	27,417	29,167
Note Collateralized By All Of BHCMC's Assets and Compensation due under the State Management Contract Due October 2026
Debt Instrument [Line Items]
Long-term debt, gross	$ 4,611	$ 7,471