Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2019	Jul. 31, 2018
REVENUE:
Revenues	$ 17,016	$ 13,404
COSTS AND EXPENSES:
Marketing and advertising	1,104	975
Employee benefits	547	505
Depreciation and amortization	1,239	388
General, administrative and other	1,786	1,693
Total costs and expenses	13,495	12,503
OPERATING INCOME	3,521	901
OTHER INCOME (EXPENSE):
Interest expense	(1,097)	(70)
Refund of sales/use tax		279
Gain on sale of airplane	529
Total other income (expense)	(568)	209
INCOME BEFORE INCOME TAXES	2,953	1,110
PROVISION FOR INCOME TAXES
Provision for income taxes	762	188
NET INCOME	2,191	922
Net income attributable to noncontrolling interest in BHCMC, LLC	(130)	(413)
NET INCOME ATTRIBUTABLE TO BUTLER NATIONAL CORPORATION	$ 2,061	$ 509
BASIC EARNINGS PER COMMON SHARE (in dollars per share)	$ 0.03	$ 0.01
WEIGHTED AVERAGE SHARES USED IN PER SHARE CALCULATION (in shares)	68,270,565	64,743,042
DILUTED EARNINGS PER COMMON SHARE (in dollars per share)	$ 0.03	$ 0.01
WEIGHTED AVERAGE SHARES USED IN PER SHARE CALCULATION (in shares)	68,270,565	64,743,042
Professional Services [Member]
REVENUE:
Revenues	$ 8,116	$ 7,948
COSTS AND EXPENSES:
Cost of services and products	3,850	4,812
Aerospace Products [Member]
REVENUE:
Revenues	8,900	5,456
COSTS AND EXPENSES:
Cost of services and products	$ 4,969	$ 4,130