Consolidated Balance Sheets - USD ($)	Jun. 30, 2019	Jun. 30, 2018	[2]
Current assets:
Cash and cash equivalents	$ 2,228,282	$ 1,081,533	[1]
Accounts receivable, less allowance for doubtful accounts of $2,617 and $51,854, respectively	3,655,143	4,709,745
Inventories	6,851,448	6,138,679
Prepaid expenses and other current assets	133,889	206,776
Income taxes receivable	45,660	32,375
Total current assets	12,914,422	12,169,108
Equipment and leasehold improvements, net	890,110	1,132,105
Other assets:
Deferred income taxes	13,276		[3]
Operating lease right-of-use asset	2,847,846	3,102,263
Cash surrender value of life insurance	6,569,628	6,374,372
Total other assets	9,430,750	9,476,635
Total assets	23,235,282	22,777,848
Current liabilities:
Accounts payable	1,436,373	1,429,491
Accrued liabilities	650,513	788,961	[4]
Deferred revenue	645,470	690,905
Operating lease liability	265,443	254,418
Total current liabilities	2,997,799	3,163,775
Long-term liabilities:
Deferred compensation	2,419,962	2,394,009
Deferred revenue	163,018	168,465
Operating lease liability	2,582,402	2,847,845
Total long-term liabilities	5,165,382	5,410,319
Total liabilities	8,163,181	8,574,094
Stockholders' equity:
Common stock, $0.005 par value, authorized 20,000,000 shares; issued and outstanding 7,404,831 and 7,382,706 shares, respectively	37,024	36,914
Paid in capital	6,186,393	5,752,270
Retained earnings	8,848,684	8,414,570
Total stockholder' equity	15,072,101	14,203,754	[5]
Total liabilities and stockholders' equity	$ 23,235,282	$ 22,777,848

[1] As adjusted for the retrospective adoption of ASC 606

[2] As adjusted for the retrospective adoption of ASC 606 and ASC 842

[3] As adjusted for the retrospective adoption of ASC 606 and ASC 842

[4] As adjusted for retrospective adoption of ASC 606

[5] As adjusted for the retrospective adoption of ASC 606