Note 16 - Fair Value of Plan Assets (Details) - Supplemental Employee Retirement Plan [Member] $ in Thousands	Dec. 31, 2015 USD ($)
Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
SERP assets	$ 1,590
Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
SERP assets
Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
SERP assets
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]
SERP assets
Money Market Funds [Member] | Fair Value, Inputs, Level 2 [Member]
SERP assets	$ 25
Money Market Funds [Member] | Fair Value, Inputs, Level 3 [Member]
SERP assets
Fixed Income Funds [Member] | Fair Value, Inputs, Level 1 [Member]
SERP assets
Fixed Income Funds [Member] | Fair Value, Inputs, Level 2 [Member]
SERP assets	$ 213
Fixed Income Funds [Member] | Fair Value, Inputs, Level 3 [Member]
SERP assets
Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member]
SERP assets
Equity Funds [Member] | Fair Value, Inputs, Level 2 [Member]
SERP assets	$ 5,391
Equity Funds [Member] | Fair Value, Inputs, Level 3 [Member]
SERP assets
Fair Value, Inputs, Level 1 [Member]
SERP assets	$ 1,590
Fair Value, Inputs, Level 2 [Member]
SERP assets	$ 5,629
Fair Value, Inputs, Level 3 [Member]
SERP assets