Condensed Consolidated Balance Sheets - USD ($)	Mar. 31, 2025	Jun. 30, 2024
Current assets:
Cash and cash equivalents	$ 2,934,892	$ 2,837,081
Short term investments	10,109,817	12,104,459
Accounts receivable, less allowance for credit losses of $2,043 and $1,922 at March 31, 2025 and June 30, 2024, respectively	1,051,955	1,208,319
Inventories	4,396,383	4,473,680
Prepaid expenses and other current assets	954,236	1,081,437
Interest receivable	146,986	170,429
Income taxes receivable	42,131	41,756
Total current assets	19,636,400	21,917,161
Equipment and leasehold improvements, net	1,534,802	1,223,391
Other assets:
Long term investments	7,002,068	4,994,327
Operating lease right-of-use asset	2,581,109	2,765,445
Cash surrender value of life insurance	6,543,539	6,299,155
Total other assets	16,126,716	14,058,927
Total assets	37,297,918	37,199,479
Current liabilities:
Accounts payable	473,246	329,829
Accrued liabilities	885,721	462,858
Deferred revenue	260,010	229,384
Operating lease liability	249,293	239,688
Income taxes payable	34,341	35,899
Total current liabilities	1,902,611	1,297,658
Long-term liabilities:
Deferred compensation	2,241,804	2,093,124
Deferred revenue	116,782	119,787
Operating lease liability	2,353,546	2,541,734
Total long-term liabilities	4,712,132	4,754,645
Total liabilities	6,614,743	6,052,303
Stockholders' equity:
Common stock, $0.005 par value, authorized 20,000,000 shares; issued and outstanding 9,375,795 at March 31, 2025 and 9,299,795 at June 30, 2024, respectively	46,879	46,499
Paid in capital	13,582,231	13,404,477
Retained earnings	17,054,065	17,696,200
Total stockholders' equity	30,683,175	31,147,176
Total liabilities and stockholders' equity	$ 37,297,918	$ 37,199,479