CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2017	Jan. 31, 2016
REVENUE:
Professional services	$ 7,202	$ 6,853	$ 22,407	$ 21,791
Aerospace products	4,093	4,214	13,090	11,078
Total revenue	11,295	11,067	35,497	32,869
COSTS AND EXPENSES:
Cost of professional services	4,729	4,275	13,899	13,317
Cost of aerospace products	2,985	3,068	9,554	8,638
Marketing and advertising	1,145	890	3,229	3,471
Employee benefits	483	470	1,397	1,384
Depreciation and amortization	496	545	1,510	1,721
General, administrative and other	1,335	1,377	3,912	4,135
Total costs and expenses	11,173	10,625	33,501	32,666
OPERATING INCOME	122	442	1,996	203
OTHER INCOME (EXPENSE):
Interest expense	(95)	(117)	(319)	(353)
Other income, net	0	13	(18)	23
Total other income (expense),	(95)	(104)	(337)	(330)
INCOME (LOSS) BEFORE INCOME TAXES	27	338	1,659	(127)
PROVISION FOR INCOME TAXES
Provision (benefit) for income taxes	0	57	0	(201)
Deferred income tax	8	0	426	0
NET INCOME (LOSS)	19	281	1,233	74
Net income attributable to noncontrolling interest in BHCMC, LLC	(5)	(179)	(477)	(431)
NET INCOME (LOSS) ATTRIBUTABLE TO BUTLER NATIONAL CORPORATION	$ 14	$ 102	$ 756	$ (357)
BASIC EARNINGS PER COMMON SHARE (in dollars per share)	$ 0.00	$ 0.00	$ 0.01	$ (0.01)
WEIGHTED AVERAGE SHARES USED IN PER SHARE CALCULATION (in shares)	63,416,953	62,260,098	63,416,953	62,260,098
DILUTED EARNINGS PER COMMON SHARE (in dollars per share)	$ 0.00	$ 0.00	$ 0.01	$ (0.01)
WEIGHTED AVERAGE SHARES USED IN PER SHARE CALCULATION (in shares)	63,416,953	62,260,098	63,416,953	62,260,098