Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Apr. 30, 2024	Apr. 30, 2023
Statement of Financial Position [Abstract]
Preferred stock, par value	$ 1.00	$ 1.00
Preferred stock, shares authorized	2,000,000	2,000,000
Preferred stock, shares issued	0	0
Common stock, no par value	$ 0	$ 0
Common stock, shares authorized	40,000,000	40,000,000
Common stock, shares issued	15,653,463	16,635,295
Common stock, shares outstanding	15,653,463	16,635,295
Long-term Debt and Lease Obligation, Current	$ 2,722	$ 2,263
Total long-term debt	$ 371,761	$ 369,396