Consolidated Statements of Income - USD ($)	12 Months Ended
	Apr. 30, 2025	Apr. 30, 2024	Apr. 30, 2023
Revenues:
Investment periodicals and related publications	$ 35,079,000	$ 37,487,000	$ 39,695,000
Expenses:
Advertising and promotion	3,797,000	2,955,000	3,049,000
Salaries and employee benefits	14,455,000	14,851,000	15,203,000
Production and distribution	5,987,000	5,455,000	5,210,000
Office and administration	4,855,000	5,085,000	4,763,000
Total expenses	29,094,000	28,346,000	28,225,000
Income from operations	5,985,000	9,141,000	11,470,000
Revenues interest in EAM Trust	16,183,000	11,900,000	10,397,000
Profits interest in EAM Trust	2,135,000	1,382,000	734,000
Investment gains	3,238,000	2,764,000	1,174,000
Income before income taxes	27,541,000	25,187,000	23,775,000
Income tax provision	6,855,000	6,171,000	5,706,000
Net income	$ 20,686,000	$ 19,016,000	$ 18,069,000
Earnings per share, basic & fully diluted (in dollars per share)	$ 2.2	$ 2.02	$ 1.91
Weighted average number of common shares (in shares)	9,417,097	9,428,379	9,458,605
Subscription and Circulation [Member]
Revenues:
Investment periodicals and related publications	$ 24,682,000	$ 25,420,000	$ 26,232,000
License [Member]
Revenues:
Investment periodicals and related publications	$ 10,397,000	$ 12,067,000	$ 13,463,000