CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($)	9 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 31,774,000	$ 36,284,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,705,000	1,627,000
Interest (income) expense on other investments	(194,000)	112,000
Unrealized (gain) loss on marketable securities	(131,000)	(52,000)
(Recovery of) credit losses	(12,000)	(26,000)
Change to inventory reserve	78,000	634,000
Deferred income taxes	(2,324,000)	(2,331,000)
Stock based compensation expense	1,143,000	876,000
Changes in operating assets and liabilities:
Accounts receivable	7,660,000	(4,178,000)
Inventories	2,973,000	(2,388,000)
Prepaid expenses and other current assets	841,000	23,000
Income tax receivable	(905,000)	75,000
Other assets	84,000	22,000
Accounts payable, accrued expenses, accrued salaries and wages, accrued income taxes	(3,789,000)	354,000
Net Cash Provided by Operating Activities	38,903,000	31,032,000
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of property, plant, and equipment	(1,879,000)	(1,043,000)
Purchases of marketable securities	(10,222,000)	(160,000)
Purchases of other investments	(78,000)	(1,123,000)
Redemption of other investments	27,252,000
Net Cash Provided by (Used in) Investing Activities	15,073,000	(2,326,000)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from stock option exercises	54,000	427,000
Cash paid for dividend	(9,164,000)	(9,570,000)
Cash paid for purchase of treasury shares	(36,794,000)
Net Cash Used in Financing Activities	(45,904,000)	(9,143,000)
Net increase in Cash and Cash Equivalents	8,072,000	19,563,000
CASH AND CASH EQUIVALENTS - Beginning	65,341,000	35,955,000
CASH AND CASH EQUIVALENTS - Ending	73,413,000	55,518,000
SUPPLEMENTAL CASH FLOW INFORMATION
Interest paid		8,000
Income taxes paid	8,350,000	$ 7,437,000
Non-Cash Investing and Financing Transactions
Cash dividends declared and not paid	$ 4,467,000