Note 8 - Accrued Liabilities - Schedule of Accrued Liabilities (Details) - USD ($)	Jun. 30, 2019	Jun. 30, 2018	[1]
Cooperative advertising and promotion allowances	$ 188,985	$ 292,873
Customer credit balances	65,937	53,365
Current deferred compensation	150,000	150,000
Employee benefits	60,178	60,739
Legal and professional fees	65,914	81,000
Bonus and profit-sharing	18,694	17,975
Sales commissions and bonuses	51,026	74,078
Other	49,779	58,931
Total accrued liabilities	$ 650,513	$ 788,961	[2]

[1] As adjusted for retrospective adoption of ASC 606

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