CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	Common Stock	Capital Contributed in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Income	Total
Balance Beginning at Apr. 30, 2024	$ 526	$ 32,986	$ 83,308	$ 1,230	$ 118,050
Balance Beginning (in shares) at Apr. 30, 2024	5,271
Issuance of restricted common stock (in shares)	16
Stock compensation expense	$ 2
Stock compensation expense		204			206
Compensation related to issuance of option to purchase common stock		37			37
Issuance of deferred common stock units		90			90
Net income			8,823		8,823
Other comprehensive loss (income)				$ (1,230)	(1,230)
Balance Ending at Jan. 31, 2025	$ 528	33,317	92,131		125,976
Balance Ending (in shares) at Jan. 31, 2025	5,287
Balance Beginning at Oct. 31, 2024	$ 527	33,135	91,414		125,076
Balance Beginning (in shares) at Oct. 31, 2024	5,287
Stock compensation expense	$ 1
Stock compensation expense		80			81
Compensation related to issuance of option to purchase common stock		12			12
Issuance of deferred common stock units		90			90
Net income			717		717
Balance Ending at Jan. 31, 2025	$ 528	33,317	92,131		125,976
Balance Ending (in shares) at Jan. 31, 2025	5,287
Balance Beginning at Apr. 30, 2025	$ 528	33,409	96,024		129,961
Balance Beginning (in shares) at Apr. 30, 2025	5,287
Issuance of restricted common stock	$ 3				3
Issuance of restricted common stock (in shares)	19
Stock compensation expense		250			250
Compensation related to issuance of option to purchase common stock		37			37
Issuance of deferred common stock units		90			90
Net income			9,039		9,039
Balance Ending at Jan. 31, 2026	$ 531	33,786	105,063		139,380
Balance Ending (in shares) at Jan. 31, 2026	5,306
Balance Beginning at Oct. 31, 2025	$ 531	33,581	101,916		136,028
Balance Beginning (in shares) at Oct. 31, 2025	5,306
Stock compensation expense		103			103
Compensation related to issuance of option to purchase common stock		12			12
Issuance of deferred common stock units		90			90
Net income			3,147		3,147
Balance Ending at Jan. 31, 2026	$ 531	$ 33,786	$ 105,063		$ 139,380
Balance Ending (in shares) at Jan. 31, 2026	5,306