CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023
Cash Flows from Operating Activities
Segment Profit	$ 43,406,000	$ 49,818,000	$ 27,127,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	2,276,000	2,163,000	1,930,000
Gain on disposal of fixed asset			(15,000)
Change in accrued Interest on other investments		31,000	(470,000)
Unrealized (gain) loss on marketable securities	(177,000)	(56,000)	80,000
Realized (gain) loss on sales of marketable securities	(56,000)
(Recovery of) credit losses	(7,000)	(99,000)	(112,000)
Change to inventory reserve	643,000	1,691,000	(445,000)
Deferred income taxes	(1,048,000)	(2,776,000)	(2,818,000)
Stock-based compensation expense	1,513,000	1,733,000	1,464,000
Changes in operating assets and liabilities:
Accounts receivable	1,797,000	(5,730,000)	3,261,000
Inventories	7,995,000	(3,255,000)	1,883,000
Prepaid expenses and other current assets	1,071,000	(867,000)	(564,000)
Income tax receivable	48,000	2,000	(75,000)
Other assets	86,000	25,000	35,000
Accounts payable, accrued expenses, accrued salaries and wages, accrued income taxes	(4,020,000)	2,688,000	(6,581,000)
Net Cash Provided by Operating Activities	53,527,000	45,368,000	24,700,000
Cash Flows from Investing Activities
Purchases of property, plant, and equipment	(2,116,000)	(1,594,000)	(2,962,000)
Proceeds from disposal of fixed asset			38,000
Purchases of marketable securities	(12,835,000)	(206,000)	(148,000)
Proceeds from sales of marketable securities	2,556,000
Purchases of other investments		(1,351,000)	(35,281,000)
Redemption of other investments	26,980,000		10,091,000
Net Cash Provided by (Used in) Investing Activities	14,585,000	(3,151,000)	(28,262,000)
Cash Flows from Financing Activates
Proceeds from stock option exercises	54,000	427,000	85,000
Dividends paid	(13,632,000)	(13,258,000)	(2,298,000)
Repurchase of common stock	(36,794,000)
Net Cash Used in Financing Activities	(50,372,000)	(12,831,000)	(2,213,000)
Net increase (decrease) in Cash and Cash Equivalents	17,740,000	29,386,000	(5,775,000)
Cash and Cash Equivalents - Beginning	65,341,000	35,955,000	41,730,000
Cash and Cash Equivalents - Ending	83,081,000	65,341,000	35,955,000
Supplemental Cash Flow Information
Interest paid		14,000	16,000
Income taxes paid	8,427,000	$ 9,330,000	$ 8,811,000
Non-Cash Investing and Financing Transactions
Dividends declared and not paid	$ 4,992,000