Note 6 - Boot Hill Casino Building and Land Purchase - Lease liability (Details) - USD ($) $ in Thousands	Dec. 19, 2020	Apr. 30, 2021	Apr. 30, 2020
Purchase price of casino building and related land	$ 41,250
Lease right-to-use asset	41,250	$ 3,099	$ 44,349
Accumulated depreciation	(4,169)	(436)	(2,844)
Net	37,081	2,663	$ 41,505
Lease liability	39,709	$ 2,866
Notes Collateralized by BHCMC's Assets and Compensation Due under State Management Contract Due December 2027 [Member]
Note, payable	35,000
Notes Collateralized by BHCMC's Assets and Compensation Due under State Management Contract Due December 2025 [Member]
Note, payable	7,000
Secured Debt [Member]
Note, payable	$ 42,000

Represents payments to acquire building and related land.

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Present value of lessee's discounted obligation for lease payments from finance lease.

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Amount, after accumulated amortization, of right-of-use asset from finance lease.

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Amount of accumulated amortization of right-of-use asset from finance lease.

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Amount, before accumulated amortization, of right-of-use asset from finance lease.

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Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer.

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