Condensed Consolidated Balance Sheets - USD ($)	Dec. 31, 2021	Jun. 30, 2021
Current assets:
Cash and cash equivalents	$ 7,788,804	$ 6,950,215
Accounts receivable, less allowance for doubtful accounts of $5,736 and $41,499, respectively	1,458,066	2,240,785
Life insurance receivable	2,007,769
Inventories, net	7,746,449	5,901,512
Prepaid expenses and other current assets	470,561	456,004
Total current assets	19,471,649	15,548,516
Equipment and leasehold improvements, net	1,195,240	1,281,180
Other assets:
Operating lease right-of-use assets	2,162,513	2,305,455
Cash surrender value of life insurance	5,701,844	7,188,994
Total other assets	7,864,357	9,494,449
Total assets	28,531,246	26,324,145
Current liabilities:
Accounts payable	866,195	398,433
Accrued liabilities	751,643	665,567
Deferred revenue	606,794	694,632
Operating lease liability	295,144	288,949
Income taxes payable	6,605	4,543
Total current liabilities	2,526,381	2,052,124
Long-term liabilities:
Deferred compensation	2,264,909	2,491,482
Deferred revenue	164,745	188,932
Operating lease liability	1,867,369	2,016,506
Total long-term liabilities	4,297,023	4,696,920
Total liabilities	6,823,404	6,749,044
Stockholders' equity:
Common stock, $0.005 par value, authorized 20,000,000 shares; issued and outstanding 9,137,795 and 8,608,706, respectively	45,739	43,044
Paid in capital	12,452,554	10,802,118
Retained earnings	9,209,549	8,729,939
Total stockholders' equity	21,707,842	19,575,101
Total liabilities and stockholders' equity	$ 28,531,246	$ 26,324,145