CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	6 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Operating activities:
Net loss	$ (321,678)	$ (325,393)
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	141,840	113,858
Net accretion of discount on treasury securities	(122,283)	(152,879)
Amortization of finance lease right-of-use asset	5,286
Noncash operating lease expense	3,835	3,834
Stock-based compensation expense	1,474	19,664
Change in cash surrender value of life insurance	(198,062)	(169,596)
Provision for deferred compensation	220,249	134,665
Net changes in operating assets and liabilities:
Accounts receivable	125,272	(161,873)
Inventories	46,690	(96,941)
Prepaid expenses and other current assets	340,338	139,243
Interest receivable	(8,653)	71,923
Income taxes receivable	5,881	(375)
Income taxes payable	(7,110)	(7,068)
Accounts payable	(329,384)	(73,686)
Accrued liabilities	77,807	395,342
Deferred revenue	20,321	58,742
Net cash provided by (used in) operating activities	1,823	(50,419)
Investing activities:
Purchase of equipment and leasehold improvements	(312,821)	(419,553)
Life insurance premiums paid	(51,301)	(70,577)
Proceeds from the maturity of treasury securities	3,000,000	7,085,000
Purchases of treasury securities	(2,996,970)	(6,998,250)
Net cash used in investing activities	(361,092)	(403,380)
Financing activities:
Proceeds from exercise of stock options	21,099	152,445
Principal payments on finance lease obligations	(4,789)
Net cash provided by financing activities	16,310	152,445
Net decrease in cash and cash equivalents	(342,959)	(301,354)
Cash and cash equivalents at beginning of period	2,807,797	2,837,081
Cash and cash equivalents at end of period	2,464,838	2,535,727
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	1,152
Cash paid, net of refunds, for income taxes	6,749	12,963
New York [Member]
Supplemental cash flow information:
Cash paid, net of refunds, for income taxes	2,022	1,550
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	591
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