Note 15 - Common Stock - Stock Repurchase Activity (Details) - USD ($)				3 Months Ended
		Sep. 30, 2021	Aug. 31, 2021	Sep. 30, 2021
Total Number of Shares Purchased (in shares)		41,816	15,943	57,759
Average Price Paid per Share (in dollars per share)	[1]	$ 5.49	$ 6.06
Repurchase Plan [Member]
Total Number of Shares Purchased (in shares)		41,816	15,943	57,759
Average Price Paid per Share (in dollars per share)				$ 5.67
Maximum Dollar Value that May Yet be Purchased Under the Programs		$ 24,672,449	$ 24,903,328	$ 24,672,449

[1] Excludes broker commission.