Condensed Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Jul. 31, 2020	Jul. 31, 2019
Cash Flows from Operating Activities:
Net Income	$ 2,492,000	$ 976,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	86,000	89,000
(Gain) loss on sale of investments		(83,000)
Impairments on investments	27,000	34,000
Unrealized (gain) loss on equity securities	(2,114,000)	(145,000)
Reserve for bad debts	(5,000)	(2,000)
Reserve for obsolete inventory	1,000	8,000
Deferred income taxes	599,000	28,000
(Increase) decrease in:
Accounts receivable	49,000	163,000
Inventories	(405,000)	(288,000)
Prepaid expenses	94,000	79,000
Employee receivables	(1,000)	2,000
Increase (decrease) in:
Accounts payable	117,000	55,000
Accrued expenses	(61,000)	(66,000)
Income tax payable	346,000	289,000
Net cash from operating activities	1,225,000	1,139,000
Cash Flows From Investing Activities:
(Purchase) of property and equipment	(95,000)	(169,000)
Proceeds from sale of marketable securities	14,000	9,000
(Purchase) of marketable securities	(111,000)	(132,000)
Net cash from investing activities	(192,000)	(292,000)
Cash Flows From Financing Activities:
(Purchase) of treasury stock		(53,000)
Net cash from financing activities		(53,000)
Net Change in Cash and Cash Equivalents	1,033,000	794,000
Cash and Cash Equivalents, beginning of period	6,458,000	4,873,000
Cash and Cash Equivalents, end of period	7,491,000	5,667,000
Supplemental Disclosure for Cash Flow Information:
Income taxes paid	0	0
Interest paid	$ 0	$ 0