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Note 5 - Fair Value of Financial Instruments (Detail) - Assets and Liabilities Measured at Fair Value on a Recurring Basis (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Fair Value of Derivatives	$ 722	$ 524
Fair Value, Inputs, Level 1 [Member]
Fair Value of Derivatives	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value of Derivatives	722	524
Fair Value, Inputs, Level 3 [Member]
Fair Value of Derivatives	$ 0	$ 0

Fair values as of the balance sheet date of all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements.

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