Note 7 - Treasury Stock (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 22, 2020
William Bartels [Member]
Treasury Stock, Shares, Increase From Employee Settlement (in shares)	52,000
Notes Receivable, Related Parties	$ 100,000
The 2021 Stock Repurchase Program [Member]
Stock Repurchase Program, Number of Shares Authorized to be Repurchased (in shares)			500,000
Treasury Stock, Shares, Acquired (in shares)	0	0