Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
REVENUES:
Revenues	$ 73,473	$ 61,480
COSTS AND EXPENSES:
Marketing and advertising	5,236	3,752
Employee benefits	2,573	2,571
Depreciation and amortization	2,815	3,542
General, administrative and other	8,488	8,208
Total costs and expenses	57,344	55,580
OPERATING INCOME	16,129	5,900
OTHER INCOME (EXPENSE):
Interest expense	(2,689)	(3,138)
Forgiveness of debt	(2,001)	0
Gain on sale of airplanes	75	0
Other	0	7
Total other income (expense)	(613)	(3,131)
INCOME BEFORE INCOME TAXES	15,516	2,769
PROVISION (BENEFIT) FOR INCOME TAXES
Provision for income taxes	3,102	536
Deferred income tax (benefit)	174	(225)
NET INCOME	12,240	2,458
Net (income) loss attributable to noncontrolling interest in BHCMC, LLC	(1,872)	(1,025)
NET INCOME ATTRIBUTABLE TO BUTLER NATIONAL CORPORATION	$ 10,368	$ 1,433
BASIC EARNINGS PER COMMON SHARE ATTRIBUTABLE TO BUTLER NATIONAL CORPORATION (in dollars per share)	$ 0.14	$ 0.02
WEIGHTED AVERAGE SHARES USED IN PER SHARE CALCULATION (in shares)	75,340,131	74,144,957
DILUTED EARNINGS PER COMMON SHARE ATTRIBUTABLE TO BUTLER NATIONAL CORPORATION (in dollars per share)	$ 0.14	$ 0.02
WEIGHTED AVERAGE SHARES USED IN PER SHARE CALCULATION (in shares)	75,340,131	74,144,957
Professional Services [Member]
REVENUES:
Revenues	$ 39,147	$ 30,205
COSTS AND EXPENSES:
Cost of services and products	15,798	14,214
Aerospace Products [Member]
REVENUES:
Revenues	34,326	31,275
COSTS AND EXPENSES:
Cost of services and products	$ 22,434	$ 23,293