Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Dec. 31, 2019	Jun. 30, 2019	[1]
Current assets:
Cash and cash equivalents	$ 2,229,084	$ 2,228,282
Accounts receivable, less allowance for doubtful accounts of $4,358 and $2,617, respectively	2,467,767	3,655,143
Inventories, net	6,701,311	6,851,448
Prepaid expenses and other current assets	234,613	133,889
Income taxes receivable	56,229	45,660
Total current assets	11,689,004	12,914,422
Equipment and leasehold improvements, net	940,364	890,110
Other assets:
Deferred income taxes	1,626	13,276
Operating lease right-of-use assets	2,716,532	2,847,846
Cash surrender value of life insurance	6,828,027	6,569,628
Total other assets	9,546,185	9,430,750
Total assets	22,175,553	23,235,282
Current liabilities:
Accounts payable	829,274	1,436,373
Accrued liabilities	761,825	650,513
Deferred revenue	495,144	645,470
Operating lease liability	271,134	265,443
Total current liabilities	2,357,377	2,997,799
Long-term liabilities:
Deferred compensation	2,381,978	2,419,962
Deferred revenue	160,268	163,018
Operating lease liability	2,445,397	2,582,402
Total long-term liabilities	4,987,643	5,165,382
Total liabilities	7,345,020	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	6,618,029	6,333,135
Retained earnings	8,175,480	8,701,942
Total stockholders' equity	14,830,533	15,072,101
Total liabilities and stockholders' equity	$ 22,175,553	$ 23,235,282

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