Note 1 - Summary of Significant Accounting Policies (Details Textual) - USD ($)	3 Months Ended			6 Months Ended
	Dec. 31, 2019	Dec. 31, 2018		Dec. 31, 2019	Dec. 31, 2018
Income Tax Expense (Benefit), Total	$ 22		[1]	$ 22	$ 25	[1]

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