Note 11 - Fair Value of Derivative Instruments in Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Accounts Payable and Accrued Liabilities [Member] \| Designated as Hedging Instrument [Member]
Interest Rate Swap Contract	$ 532	$ 1,194
Other Noncurrent Liabilities [Member] \| Designated as Hedging Instrument [Member]
Interest Rate Swap Contract		556
Interest Rate Swap Contract	$ 532	$ 1,750

Fair value as of the balance sheet date of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as liabilities.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13433-108611

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant