CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	9 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Operating activities:
Net loss	$ (868,265)	$ (642,135)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Provision for credit losses		121
Depreciation of equipment and leasehold improvements	212,568	172,356
Net accretion of discount on treasury securities	(141,818)	(192,820)
Amortization of finance lease right-of-use asset	7,929
Noncash operating lease expense	5,752	5,753
Stock-based compensation expense	2,707	25,689
Change in cash surrender value of life insurance	(202,697)	(173,807)
Provision for deferred compensation	219,646	148,680
Net changes in operating assets and liabilities:
Accounts receivable	87,760	156,243
Inventories	125,064	77,297
Prepaid expenses and other current assets	272,971	127,201
Interest receivable	(8,864)	23,443
Income taxes receivable	5,881	(375)
Income taxes payable	(5,285)	(1,558)
Accounts payable	(340,772)	143,417
Accrued liabilities	33,771	422,863
Deferred revenue	12,830	27,621
Net cash provided by (used in) operating activities	(580,822)	319,989
Investing activities:
Purchase of equipment and leasehold improvements	(316,485)	(483,767)
Life insurance premiums paid	(51,301)	(70,577)
Proceeds from the maturity of treasury securities	9,035,000	9,179,000
Purchases of treasury securities	(9,006,569)	(8,999,279)
Net cash used in investing activities	(339,355)	(374,623)
Financing activities:
Proceeds from exercise of stock options	21,100	152,445
Principal payments on finance lease obligations	(7,254)
Net cash provided by financing activities	13,846	152,445
Net increase (decrease) in cash and cash equivalents	(906,331)	97,811
Cash and cash equivalents at beginning of period	2,807,797	2,837,081
Cash and cash equivalents at end of period	1,901,466	2,934,892
Supplemental cash flow information:
Right of use assets obtained in exchange for finance lease liabilities	31,716
Cash paid for interest on finance lease liability	1,658
Cash paid, net of refunds, for income taxes	6,749	13,364
New York [Member]
Supplemental cash flow information:
Cash paid, net of refunds, for income taxes	2,022	1,617
Texas [Member]
Supplemental cash flow information:
Cash paid, net of refunds, for income taxes	2,000	6,500
Massachusetts [Member]
Supplemental cash flow information:
Cash paid, net of refunds, for income taxes	1,580	925
New Jersey [Member]
Supplemental cash flow information:
Cash paid, net of refunds, for income taxes	1,000	1,518
California [Member]
Supplemental cash flow information:
Cash paid, net of refunds, for income taxes		1,600
North Carolina [Member]
Supplemental cash flow information:
Cash paid, net of refunds, for income taxes		1,054
Other Tax Authority [Member]
Supplemental cash flow information:
Cash paid, net of refunds, for income taxes	$ 147	$ 150