Consolidated Condensed Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2021	Jan. 31, 2020
Revenues:
Revenues	$ 10,130	$ 10,803	$ 30,668	$ 30,500
Expenses:
Advertising and promotion	837	748	2,709	2,393
Salaries and employee benefits	4,716	4,523	13,778	13,299
Production and distribution	1,189	1,198	3,854	3,608
Office and administration	1,105	1,205	3,630	3,417
Total expenses	7,847	7,674	23,971	22,717
Income from operations	2,283	3,129	6,697	7,783
Revenues and profits interests in EAM Trust	4,734	3,455	12,592	9,384
Income from securities transactions, net	424	167	1,705	451
Income before income taxes	7,441	6,751	20,994	17,618
Income tax provision	1,412	1,799	4,792	4,765
Net income	$ 6,029	$ 4,952	$ 16,202	$ 12,853
Earnings per share, basic & fully diluted (in dollars per share)	$ 0.63	$ 0.51	$ 1.69	$ 1.33
Weighted average number of common shares (in shares)	9,589,093	9,640,949	9,604,869	9,652,805
Subscription and Circulation [Member]
Revenues:
Revenues	$ 6,830	$ 7,108	$ 20,823	$ 21,090
License [Member]
Revenues:
Revenues	$ 3,300	$ 3,695	$ 9,845	$ 9,410