Consolidated Condensed Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Jan. 31, 2021	Jan. 31, 2020
Cash flows from operating activities:
Net income	$ 16,202,000	$ 12,853,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	963,000	202,000
Realized gains on sales of equity securities	(1,162,000)
Non-voting revenues interest in EAM Trust	(11,113,000)	(8,389,000)
Non-voting profits interest in EAM Trust	(1,479,000)	(995,000)
Distributions received from EAM Trust	10,838,000	8,397,000
Deferred income taxes	(202,000)	370,000
Deferred rent obligation	(713,000)	78,000
Changes in operating assets and liabilities:
Unearned revenue	(1,287,000)	(1,787,000)
Accounts payable & accrued expenses	(164,000)	(318,000)
Accrued salaries	(201,000)	(164,000)
Accrued taxes on income	(1,352,000)	(182,000)
Prepaid and refundable income taxes		158,000
Prepaid expenses and other current assets	110,000	294,000
Accounts receivable	(85,000)	(3,661,000)
Total adjustments	(5,847,000)	(5,997,000)
Net cash provided by operating activities	10,355,000	6,856,000
Cash flows from investing activities:
Purchases of equity securities classified as available-for-sale	(8,524,000)	(1,716,000)
Purchases of fixed income securities classified as available-for-sale	(2,497,000)	(6,931,000)
Proceeds from sales of equity securities classified as available-for-sale	7,684,000
Proceeds from sales of fixed income securities classified as available-for-sale	11,431,000	5,223,000
Acquisition of property and equipment	(26,000)	(2,000)
Expenditures for capitalized software	(114,000)
Net cash provided by/(used in) investing activities	7,954,000	(3,426,000)
Cash flows from financing activities:
Purchase of treasury stock at cost	(1,045,000)	(572,000)
Receivable from clearing broker	608,000
Payable to clearing broker	(588,000)
Dividends paid	(6,056,000)	(5,796,000)
Net cash used in financing activities	(7,081,000)	(6,368,000)
Net change in cash and cash equivalents	11,228,000	(2,938,000)
Cash, cash equivalents and restricted cash at beginning of period	5,423,000	6,962,000
Cash, cash equivalents and restricted cash at end of period	$ 16,651,000	$ 4,024,000