Note 12 - Stock Repurchase Program (Details Textual) - USD ($) $ in Thousands	Apr. 30, 2024	[1]	Jan. 31, 2024	[1]	Oct. 31, 2023	[1]	Jul. 31, 2023		Jul. 30, 2023	Apr. 30, 2023	[1]	Jan. 31, 2023	[1]	Oct. 31, 2022	[1]	Jul. 31, 2022	[1]	Apr. 30, 2022
Share Repurchase Program, Authorized, Amount							$ 9,000		$ 4,000
Share Repurchase Program, Remaining Authorized, Amount	$ 2,536		$ 2,540		$ 2,558		$ 2,560	[1]		$ 2,594		$ 2,595		$ 2,653		$ 2,653		$ 2,655

[1] These shares of common stock were purchased through a private transaction