Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 12,240	$ 2,458
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	5,281	5,856
Forgiveness of debt	(2,001)	0
Stock issued for benefit plan	807	721
Deferred income tax (benefit)	174	(225)
Gain on sale of airplanes	(75)	0
Deferred compensation, restricted stock	585	592
Changes in operating assets and liabilities
Accounts receivable	(1,675)	823
Inventories	(304)	47
Contract asset	(1,049)	(226)
Prepaid expenses and other assets	141	123
Accounts payable	880	931
Contract liability	(4,978)	3,609
Lease liability	0	(659)
Accrued liabilities	49	(709)
Gaming facility mandated payment	172	120
Income tax payable	837	6
Other liabilities	(54)	(9)
Net cash provided by operating activities	11,030	13,458
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(9,579)	(6,992)
Proceeds from sale of airplanes	75	0
Net cash used in investing activities	(9,504)	(6,992)
CASH FLOWS FROM FINANCING ACTIVITIES
Borrowings of long-term debt	1,262	2,479
Repayments of long-term debt	(4,388)	(3,380)
Payments on lease liability	(108)	(140)
Repurchase of common stock	(168)	(196)
Net cash used in financing activities	(11,061)	(1,237)
NET INCREASE (DECREASE) IN CASH	(9,535)	5,229
CASH, beginning of year	22,022	16,793
CASH, end of year	12,487	22,022
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
Interest paid	2,684	3,034
Income taxes paid	2,265	535
NON CASH INVESTING AND FINANCING ACTIVITY
Notes receivable forgiven as part of purchase of noncontrolling interest in BHCMC, LLC	780	0
Deferred tax asset relating to the purchase of noncontrolling interest in BHCMC, LCC	2,344	0
Purchase of noncontrolling interest - note receivable and other liabilities	6,350	0
Lease right-of-use assets purchased	247	38,622
Lease liability for purchase of assets under lease	0	39,709
Notes Payable to Bank [Member]
NON CASH INVESTING AND FINANCING ACTIVITY
Secured notes payable for purchase of noncontrolling interest in BHCMC, LLC, net	7,914	0
Notes Payable [Member]
NON CASH INVESTING AND FINANCING ACTIVITY
Secured notes payable for purchase of noncontrolling interest in BHCMC, LLC, net	0	41,205
BHCMC, LLC [Member]
CASH FLOWS FROM FINANCING ACTIVITIES
Purchase of noncontrolling interest in BHCMC, LLC	$ (7,659)	$ 0