Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2016
Cash flows from operating activities:
Net income	$ 14,738,000	$ 10,367,000	$ 7,291,000
Adjustments to reconcile net income to net cash (used in)/provided by operating activities:
Depreciation and amortization	1,125,000	4,623,000	3,817,000
Non-voting revenues interest in EAM Trust	(8,040,000)	(7,195,000)	(7,211,000)
Non-voting profits interest in EAM Trust	(746,000)	(519,000)	(440,000)
Realized gain on sales of operating facilty		(8,123,000)
Realized gain on sales of equity securities	(152,000)		(329,000)
Deferred rent	422,000	265,000	(200,000)
Deferred income taxes	(7,058,000)	(1,711,000)	(1,301,000)
Other, net	(60,000)	(60,000)
Changes in operating assets and liabilities:
Unearned revenue	(134,000)	217,000	(605,000)
Accounts payable & accrued expenses	669,000	(1,245,000)	915,000
Accrued salaries	102,000	219,000	(153,000)
Accrued taxes on income	324,000	(620,000)	(2,000)
Prepaid and refundable income taxes	(385,000)	54,000	(12,000)
Prepaid expenses and other current assets	297,000	(186,000)	79,000
Accounts receivable	(31,000)	236,000	155,000
Total adjustments	(13,667,000)	(14,045,000)	(5,287,000)
Net cash (used in)/provided by operating activities	1,071,000	(3,678,000)	2,004,000
Cash flows from investing activities:
Proceeds from sales of equity securities	152,000	53,000	10,206,000
Purchases of equity securities		(4,993,000)	(3,854,000)
Proceeds from sales of fixed income securities	3,384,000	750,000
Purchases of fixed income securities	(4,368,000)	(8,235,000)
Revenues distribution received from EAM Trust	7,879,000	7,053,000	7,372,000
Profits distributions received from EAM Trust	957,000	440,000	445,000
Net proceeds from sale of operating facility		11,555,000
Restricted money market investment		(469,000)
Acquisition of property and equipment	(408,000)	(1,276,000)	(227,000)
Expenditures for capitalized software		(408,000)	(1,735,000)
Net cash provided by investing activities	7,596,000	4,470,000	12,207,000
Cash flows from financing activities:
Purchase of treasury stock at cost	(354,000)	(741,000)	(796,000)
Dividends paid	(8,929,000)	(6,616,000)	(6,167,000)
Net cash used for financing activities	(9,283,000)	(7,357,000)	(6,963,000)
Net change in cash and cash equivalents	(616,000)	(6,565,000)	7,248,000
Cash and cash equivalents at beginning of year	6,557,000	13,122,000	5,874,000
Cash and cash equivalents at end of year	$ 5,941,000	$ 6,557,000	$ 13,122,000