Note 1 - Nature of Operations, Organization and Significant Accounting Policies (Tables)

12 Months Ended

Apr. 30, 2018

Notes Tables

Schedule of Other Assets [Table Text Block]

(dollars in thousands)	2018		2017
Privilege fee	$	5,500	$	5,500
Less amortized costs		2,679		2,256
Privilege fee balance	$	2,821	$	3,244
Intangible gaming equipment	$	5,426	$	5,012
Less amortized costs		4,574		3,782
Intangible gaming equipment balance	$	852	$	1,230
JET autopilot intellectual property	$	1,417	$	1,417
Less amortized costs		960		866
JET autopilot balance	$	457	$	551

Supplemental Type Certificates Capitalized Costs [Table Text Block]

(dollars in thousands)	2018		2017
Direct labor	$	2,494	$	2,199
Direct materials		3,099		2,866
Consultant costs		1,922		1,922
Overhead		4,246		3,712
		11,761		10,699
Less-amortized costs		5,164		4,345
STC balance	$	6,597	$	6,354

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

(in thousands, except per share data)	2018		2017
Net income attributable to Butler National Corporation	$	341	$	1,534
Weighted average common shares outstanding		64,387,694		63,455,883
Dilutive effect of non-qualified stock option plans		-		-
Weighted average common shares outstanding, assuming dilution		64,387,694		63,455,883
Potential common shares if all options were exercised and shares issued		64,387,694		63,455,883
Basic earnings per common share	$	0.01	$	0.02
Diluted earnings per common share	$	0.01	$	0.02