Note 11 - Accumulated Other Comprehensive Loss - Summary of Accumulated Other Comprehensive Loss (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Balance	$ (4,568)
Foreign currency translation	(4,392)
Reclassification to operations	0
Unrealized losses	0
Pension remeasurement	0
Balance	(8,960)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Balance	475
Foreign currency translation	0
Reclassification to operations	188
Unrealized losses	(860)
Pension remeasurement	0
Balance	(197)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Balance	(1,929)
Foreign currency translation	0
Reclassification to operations	0
Unrealized losses	0
Pension remeasurement	233
Balance	(1,696)
AOCI Attributable to Parent [Member]
Balance	6,022
Foreign currency translation	(4,392)
Reclassification to operations	188
Unrealized losses	(860)
Pension remeasurement	233
Balance	10,853
AOCI Attributable to Noncontrolling Interest [Member]
Balance	(1,597)
Foreign currency translation	0
Reclassification to operations	0
Unrealized losses	0
Pension remeasurement	163
Balance	(1,434)
AOCI Including Portion Attributable to Noncontrolling Interest [Member]
Balance	(7,619)
Foreign currency translation	(4,392)
Reclassification to operations	188
Unrealized losses	(860)
Pension remeasurement	396
Balance	$ (12,287)