Note 6 - Stock Options and Incentive Plans (Details Textual) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands |
12 Months Ended | |||
---|---|---|---|---|
Apr. 12, 2019 |
Apr. 30, 2019 |
Apr. 30, 2018 |
Nov. 30, 2016 |
|
Stock Issued During Period, Value, Restricted Stock Award, Gross | $ 950 | |||
Butler National Corporation 2016 Equity Incentive Plan [Member] | ||||
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized | 12,500 | |||
Stock Issued During Period, Value, Restricted Stock Award, Gross | $ 950 | |||
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross | 0 | |||
Butler National Corporation 2016 Equity Incentive Plan [Member] | Restricted Stock [Member] | ||||
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | 2,500 | |||
Share Price | $ 0.38 | |||
Deferred Compensation Equity, Ending Balance | $ 950 | |||
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 5 years |