CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	9 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 36,284,000	$ 16,562,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,627,000	1,398,000
Gain on disposal of fixed asset		(15,000)
Interest income on other investments	112,000	(177,000)
Unrealized (gain) loss on marketable securities	(52,000)	23,000
(Recovery) of credit losses	(26,000)	(118,000)
Change to inventory reserve	634,000	(85,000)
Deferred income taxes	(2,331,000)	(1,400,000)
Stock based compensation expense	876,000	1,134,000
Changes in operating assets and liabilities:
Accounts receivable	(4,178,000)	5,166,000
Inventories	(2,388,000)	(813,000)
Prepaid expenses and other current assets	23,000	228,000
Income tax receivable	75,000	(688,000)
Other assets	22,000	48,000
Accounts payable, accrued expenses, accrued salaries and wages, accrued income taxes	354,000	(8,847,000)
Net Cash Provided by Operating Activities	31,032,000	12,416,000
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of property, plant, and equipment	(1,043,000)	(2,547,000)
Proceeds from disposal of fixed asset		38,000
Purchases of marketable securities	(160,000)	(110,000)
Purchases of other investments	(1,123,000)	(30,185,000)
Redemption of other investments		10,091,000
Net Cash Used in Investing Activities	(2,326,000)	(22,713,000)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from stock option exercises	427,000	82,000
Cash paid for dividend	(9,570,000)
Net Cash (Used in) Provided by Financing Activities	(9,143,000)	82,000
Net increase (decrease) in Cash and Cash Equivalents	19,563,000	(10,215,000)
CASH AND CASH EQUIVALENTS - Beginning	35,955,000	41,730,000
CASH AND CASH EQUIVALENTS - Ending	55,518,000	31,515,000
SUPPLEMENTAL CASH FLOW INFORMATION
Interest paid	8,000	12,000
Income taxes paid	$ 7,437,000	$ 6,421,000