Note 7 - Stockholders' Equity (Details) (USD $)	12 Months Ended							0 Months Ended	12 Months Ended		0 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Restricted Stock [Member] Certain Officers and Employees [Member]	Dec. 31, 2013 Restricted Stock [Member] Certain Employees [Member]	Dec. 31, 2013 Restricted Stock [Member] Consultant [Member]	Dec. 31, 2013 Restricted Stock [Member] Board of Directors [Member]	Aug. 04, 2011 Restricted Stock [Member]	Dec. 31, 2012 Restricted Stock [Member]	Dec. 31, 2011 Restricted Stock [Member]	Aug. 12, 2011 Issuance Of Common Stock For Acquisitions [Member]	Dec. 31, 2013 Employee Stock Option [Member]	Dec. 31, 2013 Common Stock [Member]	Dec. 31, 2012 Common Stock [Member]	Dec. 31, 2011 Common Stock [Member]	Dec. 31, 2012 Warrant [Member]	Dec. 31, 2011 Acquisitions Completed Through June 30, 2011 [Member]	Dec. 31, 2012 2010 Acquisition Agreement [Member]
Note 7 - Stockholders' Equity (Details) [Line Items]
Stock Issued During Period, Shares, Acquisitions															2,098,038
Stock Issued During Period, Value, Acquisitions (in Dollars)			$ 45,386,000														$ 45,400,000
Stock Issued During Period, Shares, Treasury Stock Reissued		6,000												6,190	202,999
Stock Issued During Period, Value, Treasury Stock Reissued (in Dollars)		85,000	1,788,000
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period		282,000								14,000					458,000
Stock Issued During Period, Shares, Other			21,000								58,000
Share-based Goods and Nonemployee Services Transaction, Quantity of Securities Issued								31,000					289,738	47,603	44,908
Stock Issued During Period, Value, Other (in Dollars)								425,000			808,000
Stock Repurchase Program, Authorized Amount (in Dollars)			20,000,000
Stock Repurchased During Period, Shares		39,000	1,009,000															67,000
Treasury Stock Acquired, Average Cost Per Share (in Dollars per share)	$ 9.38	$ 9.91	$ 9.34
Treasury Stock, Value, Acquired, Cost Method (in Dollars)		387,000	9,421,000
Stock Issued During Period, Shares, Conversion of Convertible Securities									9,000							21,000
Stock Issued During Period, Shares, Restricted Stock Award, Gross		39,000		231,000			20,000
Stock Issued During Period, Value, Restricted Stock Award, Gross (in Dollars)		455,000		3,200,000	485,000
Stock Repurchased During Period, Value (in Dollars)		387,000																896,000
Stock Issued During Period, Shares, Share-based Compensation, Gross					37,000	2,000						2,200,000	2,297,114	302,875	479,423
Warrants Exercised During Period	60,000
Treasury Stock, Shares	905,349	905,349
Stock Repurchase Program, Remaining Authorized Repurchase Amount (in Dollars)	$ 10,200,000