CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	6 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Cash Flows from Operating Activities
Net income	$ 25,668,000	$ 21,652,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,135,000	1,133,000
Change in accrued interest on other investments		(194,000)
Unrealized gain on marketable securities		(82,000)
Realized gain on sales of marketable securities	(191,000)
Charge (recovery) of credit losses	2,000	(12,000)
Change to inventory reserve	(332,000)	(184,000)
Deferred income taxes	3,199,000	(1,584,000)
Stock-based compensation expense	494,000	757,000
Changes in operating assets and liabilities:
Accounts receivable	2,042,000	8,454,000
Inventories	(1,705,000)	422,000
Prepaid expenses and other current assets	(817,000)	1,017,000
Income tax receivable	(1,382,000)	(1,129,000)
Other assets	5,000	81,000
Accounts payable, accrued expenses, accrued salaries and wages, accrued income taxes	(1,383,000)	(4,807,000)
Net Cash Provided by Operating Activities	26,735,000	25,524,000
Cash Flows from Investing Activities
Purchases of property, plant, and equipment	(778,000)	(1,814,000)
Purchases of marketable securities	(5,190,000)	(7,642,000)
Proceeds from sales of marketable securities	11,056,000
Purchases of other investments		(78,000)
Redemption of other investments		27,252,000
Net Cash Provided by Investing Activities	5,088,000	17,718,000
Cash Flows from Financing Activates
Proceeds from stock option exercises	0	54,000
Dividends paid	(9,985,000)	(4,610,000)
Repurchase of common stock		(18,008,000)
Net Cash Used in Financing Activities	(9,985,000)	(22,564,000)
Net increase in Cash and Cash Equivalents	21,838,000	20,678,000
Cash and Cash Equivalents - Beginning	83,081,000	65,341,000
Cash and Cash Equivalents - Ending	104,919,000	86,019,000
Supplemental Cash Flow Information
Interest paid		15,000
Income taxes paid	3,100,000	6,051,000
Non-Cash Investing and Financing Transactions
Dividends declared and not paid	$ 4,993,000	$ 4,554,000