Condensed Consolidated Balance Sheets - USD ($)	Dec. 31, 2023	Jun. 30, 2023
Current assets:
Cash and cash equivalents	$ 2,524,254	$ 3,091,062
Short term investments	12,071,737	17,064,274
Accounts receivable, less allowance for credit losses of $1,922 and $6,027, respectively	1,513,908	1,379,517
Inventories	5,166,667	6,423,441
Prepaid expenses and other current assets	1,062,264	1,002,514
Interest receivable	134,046	51,150
Income taxes receivable	127,363	86,901
Total current assets	22,600,239	29,098,859
Equipment and leasehold improvements, net	1,261,850	953,903
Other assets:
Long term investments	5,000,920
Operating lease right-of-use asset	2,884,497	3,015,887
Cash surrender value of life insurance	6,254,684	6,020,048
Total other assets	14,140,101	9,035,935
Total assets	38,002,190	39,088,697
Current liabilities:
Accounts payable	262,502	267,513
Accrued liabilities	923,243	1,342,039
Deferred revenue	334,672	450,312
Operating lease liability	233,492	236,225
Income taxes payable	3,758	87,237
Total current liabilities	1,757,667	2,383,326
Long-term liabilities:
Deferred compensation	2,060,375	1,997,120
Deferred revenue	120,644	113,003
Operating lease liability	2,663,148	2,787,970
Total long-term liabilities	4,844,167	4,898,093
Total liabilities	6,601,834	7,281,419
Stockholders' equity:
Common stock, $0.005 par value, authorized 20,000,000 shares; issued and outstanding 9,254,795 and 9,234,795, respectively	46,274	46,174
Paid in capital	13,233,733	13,113,993
Retained earnings	18,120,349	18,647,111
Total stockholders' equity	31,400,356	31,807,278
Total liabilities and stockholders' equity	$ 38,002,190	$ 39,088,697