Note 14 - Accumulated Other Comprehensive Income (Details) - Changes in Accumulated Other Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ (1,267)
Net current period other comprehensive income	683	$ 586
Ending balance	(584)
Other comprehensive income (loss) before reclassifications	625
Losses (gains) reclassified from accumulated other comprehensive income (loss)	58
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(501)
Net current period other comprehensive income	439
Ending balance	(62)
Other comprehensive income (loss) before reclassifications	414
Losses (gains) reclassified from accumulated other comprehensive income (loss)	25
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(35)
Net current period other comprehensive income	197
Ending balance	162
Other comprehensive income (loss) before reclassifications	168
Losses (gains) reclassified from accumulated other comprehensive income (loss)	29
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(352)
Net current period other comprehensive income	4
Ending balance	(348)
Losses (gains) reclassified from accumulated other comprehensive income (loss)	4
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(379)
Net current period other comprehensive income	43
Ending balance	(336)
Other comprehensive income (loss) before reclassifications	$ 43