Note 10 - Income (Loss) Per Common and Common Stock Equivalent Share (Details Textual) - shares	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Weighted Average Number of Shares Outstanding, Basic, Total	7,401,030	7,382,706	[1]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	2,523,513	2,405,000

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