Note 13 - Share Repurchase Program (Details Textual) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Feb. 29, 2020
Stock Repurchase Program, Number of Shares Authorized to be Repurchased (in shares)			700,000
Treasury Stock, Shares, Acquired (in shares)	202,392	91,303
Treasury Stock Acquired, Average Cost Per Share (in dollars per share)	$ 23.62	$ 27.77
Treasury Stock Value Acquired Weighted Average Method	$ 4,780	$ 2,536
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased (in shares)	497,608