Note 11 - Industry Segmentation and Sales by Major Customer (Tables)

12 Months Ended

Apr. 30, 2018

Notes Tables

Schedule of Segment Reporting Information, by Segment [Table Text Block]

Year ended April 30, 2018	Professional Services		Aerospace Products		Consolidated
Total revenues	$	31,283	$	16,977	$	48,260
Depreciation and amortization		1,256		504		1,760
Operating income		1,721		402		2,123
Capital expenditures, net		631		1,658		2,289
Interest expense		-		-		(331	)
Other income (expense)		-		-		4
Income before taxes		-		-		1,796
Income tax expense		-		-		540
Net income attributable to Butler National Corporation		-		-		341
Identifiable assets, net		21,538		19,893		41,431

Year ended April 30, 2017	Professional Services		Aerospace Products		Consolidated
Total revenues	$	30,849	$	19,770	$	50,619
Depreciation and amortization		1,423		562		1,985
Operating income		1,622		1,878		3,500
Capital expenditures, net		2,296		884		3,180
Interest expense		-		-		(403	)
Other income (expense)		-		-		(16	)
Income before taxes		-		-		3,082
Income tax expense		-		-		768
Net income attributable to Butler National Corporation		-		-		1,534
Identifiable assets, net		21,863		20,915		42,778

Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]

	2018			2017
Aerospace Products – one customer		12.3	%		10.5	%
Professional Services		-			-