Condensed Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Jan. 31, 2022	Jan. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$ 3,595,000	$ 7,799,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	319,000	297,000
(Gain) on sale of investments	(391,000)	(372,000)
Impairments on investments		79,000
Unrealized (gain) loss on equity investments	686,000	(4,653,000)
Reserve for bad debts	16,000
Reserve for obsolete inventory	229,000	25,000
Deferred income taxes	(310,000)	1,303,000
PPP loan debt forgiveness		(950,000)
(Gain) on sale of assets		(4,000)
Increase (decrease) in:
Accounts receivable	91,000	(376,000)
Inventories	(1,465,000)	(823,000)
Prepaid expenses	(1,089,000)	327,000
Other receivables		(24,000)
Accounts payable	(176,000)	311,000
Accrued expenses	130,000	54,000
Income tax payable	163,000	249,000
Net cash from operating activities	1,798,000	3,242,000
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from sale of assets		4,000
(Purchase) of property and equipment	(164,000)	(426,000)
Proceeds from sale of marketable securities	383,000	18,000
(Purchase) of marketable securities	(640,000)	(440,000)
(Purchase) of long-term investment	(24,000)
Net cash from investing activities	(445,000)	(844,000)
CASH FLOWS FROM FINANCING ACTIVITIES:
(Purchase) of treasury stock	(35,000)	(28,000)
Dividends paid	(2,256,000)	(1,892,000)
Net cash from financing activities	(2,291,000)	(1,920,000)
NET CHANGE IN CASH AND CASH EQUIVALENTS	(938,000)	478,000
Cash and Cash Equivalents, beginning of period	7,326,000	6,458,000
Cash and Cash Equivalents, end of period	6,388,000	6,936,000
Supplemental Disclosure for Cash Flow Information:
Income taxes	1,290,000	975,000
Interest paid
Cash receipts for:
Income taxes