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Note 14 - Stockholders' Equity (Details Textual) - USD ($)			1 Months Ended		12 Months Ended
	Jan. 02, 2015	May. 06, 2014	May. 31, 2015	Aug. 31, 2010	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Apr. 29, 2014	Oct. 31, 2008
Plan 2001 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term								10 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number						0	7,500
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant					614,921
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized					1,900,000
Other Option Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number					0	0
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant					0
Long-term Incentive Plan [Member]
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures					86,483
Allocated Share-based Compensation Expense					$ 1,200,000
Percentage of Incentive Plan Based on Service Completion	50.00%
Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period	3 years
Percentage of Incentive Plan Based on Shareholder Return	50.00%
Incentive Plan, Term for ShareholderReturn	3 years
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited					55,419
Restricted Stock [Member] \| Minimum [Member]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition						3 years
Restricted Stock [Member] \| Maximum [Member]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition						5 years
Restricted Stock [Member] \| Key Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period					917,851	18,536	25,207
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value					$ 4.55	$ 11.38	$ 9.30
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized					$ 4,400,000	$ 200,000	$ 200,000
Restricted Stock [Member]
Allocated Share-based Compensation Expense					$ 250,000	$ 350,000	$ 350,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period					978,526	61,957	60,032
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value					$ 4.53	$ 9.05	$ 9.74
Performance Shares [Member] \| Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period							100,000
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period					10,000	7,500
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Forfeitures and Expirations					13,750
Chief Executive Officer [Member]
Deferred Compensation Arrangement with Individual, Award Value			$ 2,500,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross			600,000
Director [Member]
Restricted Stock Award, Forfeitures						$ 6,203
D.A. Davidson and Co. [Member]
Stock Issued During Period, Shares, New Issues		2,100,000
Share Price		$ 6.90
Proceeds from Issuance of Common Stock		$ 14,000,000
Preferred Stock, Shares Issued					0	0
Treasury Stock, Shares, Acquired					0	0
Treasury Stock, Shares						0	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number					0	0	0
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition						1 year 219 days
Proceeds from Stock Options Exercised					$ 0	$ 100,000	$ 100,000
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures					119,343	0	9,521
Allocated Share-based Compensation Expense					$ 1,200,000	$ 800,000	$ 800,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options						$ 0
Stock Repurchase Program, Authorized Amount				$ 10,000,000						$ 5,000,000
Stock Repurchase Program Additional Authorized Amount				$ 5,000,000
Stock Repurchased and Retired During Period, Shares					96,076	8,120
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized					$ 3,100,000
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures					$ 500,000		$ 100,000
Maximum Authorized Proceeds from Issuance or Sale of Equity									$ 80,000,000
Proceeds from Issuance of Common Stock						$ 14,046,000