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Note 5 - Accumulated Other Comprehensive Loss - Disclosure of Changes in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Balance	$ (22,475)
Net current-period other comprehensive income (loss)	(17,688)	$ (6,708)	$ (13,352)
Balance	(40,163)	(22,475)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Balance	(9,502)	(1,878)
Other comprehensive income (loss) before reclassifications	(18,545)	(7,624)
Amounts reclassified from AOCL
Net current-period other comprehensive income (loss)	(18,545)	(7,624)
Balance	(28,047)	(9,502)	(1,878)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Balance	(11,362)	(13,243)
Other comprehensive income (loss) before reclassifications	(273)	1,105
Amounts reclassified from AOCL	595	776
Net current-period other comprehensive income (loss)	322	1,881
Balance	(11,040)	(11,362)	(13,243)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Balance	(1,611)	(646)
Other comprehensive income (loss) before reclassifications	535	(965)
Amounts reclassified from AOCL
Net current-period other comprehensive income (loss)	535	(965)
Balance	(1,076)	(1,611)	(646)
AOCI Attributable to Parent [Member]
Balance	(22,475)	(15,767)
Other comprehensive income (loss) before reclassifications	(18,283)	(7,484)
Amounts reclassified from AOCL	595	776
Net current-period other comprehensive income (loss)	(17,688)	(6,708)
Balance	$ (40,163)	$ (22,475)	$ (15,767)

X

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e637-108580

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14A
-URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669686-108580

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- Definition

Amount after tax, before reclassification adjustments of other comprehensive income (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 55
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=66004921&loc=d3e1436-108581

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14A
-URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669686-108580

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