Note 16 - Shareholders' Equity (Details Textual) - USD ($)		1 Months Ended	12 Months Ended
	Oct. 15, 2010	Aug. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jul. 26, 2016	Oct. 14, 2010
Stock Issued During Period, Shares, Acquisitions (in shares)	3,360,000
Stock Issued During Period at Purchase Price Per Share, Acquisition (in dollars per share)	$ 15
Stock Issued During Period, Value, Acquisitions	$ 50,400,000
Percentage of Shares Sold of Common Stock Issued and Outstanding	87.60%
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.01		$ 0.01	$ 0.01			$ 2
Common Stock, Shares Authorized (in shares)	100,000,000		100,000,000	100,000,000
Stock Repurchase Program, Number of Shares Authorized to be Repurchased (in shares)						500,000
Treasury Stock, Shares, Acquired (in shares)		100	0	0	72,471
Treasury Stock Acquired, Average Cost Per Share (in dollars per share)		$ 17.10			$ 14.04
Common Stock, Dividends, Per Share, Cash Paid (in dollars per share)			$ 0.01
Payments of Ordinary Dividends, Common Stock			$ 155,000	$ 154,000	$ 77,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)			3,555