CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 27,127,000	$ 19,599,000	$ 15,413,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,930,000	1,771,000	1,697,000
Gain on disposal of fixed asset	(15,000)
Interest income on other investments	(470,000)
Unrealized loss (gain) on marketable securities	80,000	426,000	9,000
(Recovery) reserve of credit losses	(112,000)	17,000	(100,000)
Change to inventory reserve	(445,000)	1,187,000	(79,000)
Deferred income taxes	(2,818,000)	(214,000)	337,000
Stock based compensation expense	1,464,000	1,649,000	435,000
Gain on extinguishment of debt		(3,904,000)
Changes in operating assets and liabilities:
Accounts receivable	3,261,000	(1,154,000)	(5,049,000)
Inventories	1,883,000	(19,274,000)	8,794,000
Prepaid expenses and other current assets	(564,000)	(430,000)	(359,000)
Income tax receivable	(75,000)
Other assets	35,000	(103,000)
Accounts payable, accrued expenses, accrued salaries and wages, accrued income taxes	(6,581,000)	8,762,000	1,889,000
Net Cash Provided by Operating Activities	24,700,000	8,332,000	22,987,000
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of property, plant, and equipment	(2,962,000)	(1,482,000)	(1,007,000)
Proceeds from disposal of fixed asset	38,000
Purchases of marketable securities	(148,000)	(81,000)	(5,422,000)
Purchases of other investments	(35,281,000)
Redemption of other investments	10,091,000
Net Cash Used in Investing Activities	(28,262,000)	(1,563,000)	(6,429,000)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from stock option exercises	85,000	155,000
Cash paid for dividend	(2,298,000)
Net Cash (Used in) Provided by Financing Activities	(2,213,000)	155,000
Net (decrease) increase in Cash and Cash Equivalents	(5,775,000)	6,924,000	16,558,000
CASH AND CASH EQUIVALENTS - Beginning	41,730,000	34,806,000	18,248,000
CASH AND CASH EQUIVALENTS - Ending	35,955,000	41,730,000	34,806,000
SUPPLEMENTAL CASH FLOW INFORMATION
Interest paid	16,000	16,000	18,000
Income taxes paid	$ 8,811,000	$ 2,168,000	$ 1,970,000