Note 13 - Fair Value Measurements - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) - USD ($) $ in Thousands |
Apr. 30, 2020 |
Apr. 30, 2019 |
---|---|---|
Long-term debt | $ 5,439 | $ 3,975 |
Financial and Nonfinancial Liabilities, Fair Value Disclosure | 5,439 | 3,975 |
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | ||
Long-term debt | ||
Financial and Nonfinancial Liabilities, Fair Value Disclosure | ||
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | ||
Long-term debt | ||
Financial and Nonfinancial Liabilities, Fair Value Disclosure | ||
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | ||
Long-term debt | 5,439 | 3,975 |
Financial and Nonfinancial Liabilities, Fair Value Disclosure | $ 5,439 | $ 3,975 |