Note 12 - Stockholders' Equity (Details Textual)		12 Months Ended
	Jul. 15, 2021 shares	Dec. 31, 2022 USD ($) $ / shares shares	Dec. 31, 2021 shares	Dec. 31, 2016
Excess Stock, Shares Authorized (in shares)		1,000,000
Preferred Stock, Shares Outstanding, Ending Balance (in shares)		0
Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements (in shares)		0	35,000
Stock Issued During Period, Fractional Shares, Stock Splits (in shares)	0
Reverse Stock Split, Fractional Shares, Cash, Multiplier	0.70
Treasury Stock Acquired, Average Cost Per Share (in dollars per share) | $ / shares		$ 7.76
Treasury Stock, Value, Acquired, Cost Method | $		$ 20,951
Common Stock [Member]
Stock Repurchase Program, Authorized Amount | $		$ 1,500,000
Treasury Stock, Shares, Acquired (in shares)		2,699
Treasury Stock Acquired, Average Cost Per Share (in dollars per share) | $ / shares		$ 7.74
Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	12
Minimum [Member]
Ownership Percentage				4.90%