Note 15 - Common Stock - Stock Repurchase Activity (Details) - USD ($)									6 Months Ended
	Jun. 30, 2022	May 31, 2022	Apr. 30, 2022	Mar. 31, 2022		Feb. 28, 2022	Jan. 31, 2022		Jun. 30, 2022
Total Number of Shares Purchased (in shares)	0	20,000	0	52,739		75,865	130,803		279,407
Average Price Paid per Share (in dollars per share)	$ 0	$ 3.15	$ 0	$ 4.36	[1]	$ 4.90	$ 5.08	[1]
Repurchase Plan [Member]
Total Number of Shares Purchased (in shares)	0	20,000	0	52,739		75,865	130,803		279,407
Average Price Paid per Share (in dollars per share)									$ 4.75
Maximum Dollar Value that May Yet be Purchased Under the Programs	$ 768,156	$ 768,156	$ 831,229	$ 831,229		$ 1,061,426	$ 1,432,822		$ 768,156

[1] Excludes broker commission.