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Note 13 - Derivative Financial Instruments (Details) - Reconciliation of Changes in Fair Value (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Derivative [Line Items]
Beginning fair value of derivatives	$ 30us-gaap_DerivativeLiabilitiesCurrent
(Gain) loss on derivatives	(2)	(242)	2,610
Ending fair value of derivatives		30us-gaap_DerivativeLiabilitiesCurrent
Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Beginning fair value of derivatives	30	2,984	2,046
(Gain) loss on derivatives	(2)	(242)	2,610
Cash settlements paid	(28)	(2,712)	(1,672)
Ending fair value of derivatives		$ 30	$ 2,984

Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

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