CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	6 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 23,088,000	$ 7,013,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,088,000	928,000
Gain on disposal of fixed asset		(15,000)
Interest income on other investments	(17,000)	(68,000)
Unrealized (gain) loss on marketable securities	(71,000)	118,000
(Recovery) of credit losses	(35,000)	(28,000)
Change to inventory reserve	720,000	(560,000)
Deferred income taxes	(1,405,000)	(994,000)
Stock based compensation expense	610,000	812,000
Changes in operating assets and liabilities:
Accounts receivable	(1,448,000)	8,261,000
Inventories	(5,005,000)	(5,136,000)
Prepaid expenses and other current assets	(124,000)	11,000
Income tax receivable	(292,000)	(583,000)
Other assets	20,000	(17,000)
Accounts payable, accrued expenses, accrued salaries and wages, accrued income taxes	1,564,000	(8,654,000)
Net Cash Provided by (Used in) Operating Activities	18,693,000	1,088,000
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of property, plant, and equipment	(682,000)	(816,000)
Proceeds from disposal of fixed asset		38,000
Purchases of marketable securities	(117,000)	(10,078,000)
Purchases of other investments	(655,000)
Net Cash Used in Investing Activities	(1,454,000)	(10,856,000)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from stock option exercises		45,000
Cash paid for dividend	(5,883,000)
Net Cash (Used in) Provided by Financing Activities	(5,883,000)	45,000
Net increase (decrease) in Cash and Cash Equivalents	11,356,000	(9,723,000)
CASH AND CASH EQUIVALENTS - Beginning	35,955,000	41,730,000
CASH AND CASH EQUIVALENTS - Ending	47,311,000	32,007,000
SUPPLEMENTAL CASH FLOW INFORMATION
Interest paid	4,000	8,000
Income taxes paid	$ 5,165,000	$ 4,469,000