Consolidated Balance Sheets - USD ($)	Jun. 30, 2023	Jun. 30, 2022
Current assets:
Cash and cash equivalents	$ 3,091,062	$ 9,208,170
Short-term investments	17,064,274
Accounts receivable, less allowance for doubtful accounts of $6,027 and $2,027, respectively	1,379,517	1,846,620
Inventories	6,423,441	8,631,362
Prepaid expenses and other current assets	284,622	188,478
Interest receivable	51,150
Income tax receivable	86,901	3,085
Total current assets	28,380,967	19,877,715
Equipment and leasehold improvements, net	953,903	1,088,017
Other assets:
Operating lease right-of-use asset	3,015,887	3,247,725
Cash surrender value of life insurance	6,020,048	5,744,724
Total other assets	9,035,935	8,992,449
Total assets	38,370,805	29,958,181
Current liabilities:
Accounts payable	267,513	796,163
Accrued liabilities	970,530	560,356
Deferred revenue	450,312	543,891
Operating lease liability	236,225	223,530
Income taxes payable	87,237	6,118
Total current liabilities	2,011,817	2,130,058
Long-term liabilities:
Deferred compensation	1,997,120	1,937,229
Deferred revenue	113,003	169,210
Operating lease liability	2,787,970	3,024,195
Total long-term liabilities	4,898,093	5,130,634
Total liabilities	6,909,910	7,260,692
Stockholders' equity:
Common stock, $0.005 par value, authorized 20,000,000 shares; issued and outstanding 9,234,795 and 9,147,795 shares, respectively	46,174	45,739
Paid in capital	13,113,993	12,653,402
Retained earnings	18,300,728	9,998,348
Total stockholders' equity	31,460,895	22,697,489
Total liabilities and stockholders' equity	$ 38,370,805	$ 29,958,181