Note 11 - Related Party Transactions (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Payment to Acquire Life Insurance Policy, Investing Activities	$ 5,197,000	$ 4,000,000
Directors and former CFO [Member]
Payment to Acquire Life Insurance Policy, Investing Activities	1,400,000	$ 1,100,000
Director Jones [Member]
Payment to Acquire Life Insurance Policy, Investing Activities	$ 5,734