Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Sep. 30, 2019	Jun. 30, 2019	[1]
Current assets:
Cash and cash equivalents	$ 1,329,487	$ 2,228,282
Accounts receivable, less allowance for doubtful accounts of $5,201 and $2,617, respectively	3,132,158	3,655,143
Inventories, net	6,858,779	6,851,448
Prepaid expenses and other current assets	231,036	133,889
Income taxes receivable	47,921	45,660
Total current assets	11,599,381	12,914,422
Equipment and leasehold improvements, net	959,635	890,110
Other assets:
Deferred income taxes	9,957	13,276
Operating lease right-of-use assets	2,782,537	2,847,846
Cash surrender value of life insurance	6,827,133	6,569,628
Total other assets	9,619,627	9,430,750
Total assets	22,178,643	23,235,282
Current liabilities:
Accounts payable	572,178	1,436,373
Accrued liabilities	711,615	650,513
Deferred revenue	616,688	645,470
Operating lease liability	268,274	265,443
Total current liabilities	2,168,755	2,997,799
Long-term liabilities:
Deferred compensation	2,419,478	2,419,962
Deferred revenue	166,607	163,018
Operating lease liability	2,514,263	2,582,402
Total long-term liabilities	5,100,348	5,165,382
Total liabilities	7,269,103	8,163,181
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	6,481,323	6,333,135
Retained earnings	8,391,193	8,701,942
Total stockholders' equity	14,909,540	15,072,101
Total liabilities and stockholders' equity	$ 22,178,643	$ 23,235,282

[1] As adjusted for change in accounting principle (Note 2)