CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)	Mar. 31, 2026	Jun. 30, 2025
Current assets:
Cash and cash equivalents	$ 1,901,466	$ 2,807,797
Available-for-sale investments, at fair value	16,956,081
Short-term investments held to maturity, at amortized cost		12,879,882
Accounts receivable, less allowance for credit losses of $2,043 at March 31, 2026 and June 30, 2025	1,047,912	1,135,672
Inventories	4,760,003	4,885,067
Prepaid expenses and other current assets	465,359	738,330
Interest receivable	130,042	121,178
Income taxes receivable	30,298	36,179
Total current assets	25,291,161	22,604,105
Equipment and leasehold improvements, net	1,580,815	1,476,898
Other assets:
Long-term investments held to maturity, at amortized cost		4,000,774
Finance lease right-of-use asset	23,787
Operating lease right-of-use asset	2,324,147	2,518,088
Cash surrender value of life insurance	6,838,742	6,584,744
Total other assets	9,186,676	13,103,606
Total assets	36,058,652	37,184,609
Current liabilities:
Accounts payable	478,558	819,330
Accrued liabilities	615,911	582,140
Deferred revenue	241,519	242,644
Finance lease liability	10,349
Operating lease liability	262,700	252,579
Income taxes payable	37,673	42,958
Total current liabilities	1,646,710	1,939,651
Long-term liabilities:
Deferred compensation	2,446,100	2,226,454
Deferred revenue	133,269	119,314
Finance lease liability	14,113
Operating lease liability	2,090,845	2,289,155
Total long-term liabilities	4,684,327	4,634,923
Total liabilities	6,331,037	6,574,574
Stockholders' equity:
Common stock, $0.005 par value, authorized 20,000,000 shares; issued and outstanding 9,466,438 at March 31, 2026 and 9,456,438 at June 30, 2025, respectively	47,332	47,282
Paid in capital	13,765,141	13,741,384
Accumulated other comprehensive loss	(37,962)
Retained earnings	15,953,104	16,821,369
Total stockholders' equity	29,727,615	30,610,035
Total liabilities and stockholders' equity	$ 36,058,652	$ 37,184,609