Note 9 - Derivative Financial Instrument (Details) - Fair Value of Derivative Instruments in Consolidated Balance Sheets (Designated as Hedging Instrument [Member], USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Derivatives, Fair Value [Line Items]
Interest rate swap contracts	$ 2,032	$ 2,900
Accounts Payable and Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Interest rate swap contracts	1,213	1,215
Other Noncurrent Liabilities [Member]
Derivatives, Fair Value [Line Items]
Interest rate swap contracts	$ 819	$ 1,685