Note 12 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Maximum [Member]
Tax Credit Carryforward Expiration	20 years
Minimum [Member]
Tax Credit Carryforward Expiration	7 years
Interest Rate Swap Agreement [Member]
Increase (Decrease) in Deferred Income Taxes	$ 105
Impairment of the Indefinite Lived Intangible Asset [Member]
Increase (Decrease) in Deferred Income Taxes	3,100
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	2	$ 4
Income Taxes Paid, Net	$ 500	$ 4,700	$ 7,600