Note 10 - Cash Dividends (Details Textual) - USD ($) $ / shares in Units, $ in Millions		6 Months Ended
	Jan. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Feb. 15, 2022
Payments of Dividends, Total		$ 2.7	$ 2.6
Dividends Accrued		$ 0.1	$ 0.1
Subsequent Event [Member]
Quarterly Indicated Per Share Dividend Rate (in dollars per share)				$ 0.05
Dividends Payable, Date to be Paid	Feb. 15, 2022