Condensed Consolidated Balance Sheets - USD ($)	Sep. 30, 2020	Jun. 30, 2020
Current assets:
Cash and cash equivalents	$ 3,449,945	$ 3,999,409
Accounts receivable, less allowance for doubtful accounts of $89,747 and $74,082, respectively	3,229,028	2,317,064
Inventories, net	5,297,253	5,538,794
Prepaid expenses and other current assets	467,762	267,647
Income taxes receivable	13,143	14,622
Total current assets	12,457,131	12,137,536
Equipment and leasehold improvements, net	1,174,359	983,641
Other assets:
Operating lease right-of-use assets	2,514,263	2,582,402
Cash surrender value of life insurance	7,137,680	6,876,827
Total other assets	9,651,943	9,459,229
Total assets	23,283,433	22,580,406
Current liabilities:
Accounts payable	938,955	827,705
Accrued liabilities	849,434	580,099
Deferred revenue	544,251	423,639
Operating lease liability	279,900	276,947
Short-term debt	506,700	506,700
Total current liabilities	3,119,240	2,615,090
Long-term liabilities:
Deferred compensation	2,316,982	2,333,482
Deferred revenue	176,828	170,281
Operating lease liability	2,234,363	2,305,455
Total long-term liabilities	4,728,173	4,809,218
Total liabilities	7,847,413	7,424,308
Stockholders' equity:
Common stock, $0.005 par value, authorized 20,000,000 shares; issued and outstanding 7,404,831	37,024	37,024
Paid in capital	7,035,723	6,882,729
Retained earnings	8,363,273	8,236,345
Total stockholders' equity	15,436,020	15,156,098
Total liabilities and stockholders' equity	$ 23,283,433	$ 22,580,406