Note 11 - Accumulated Other Comprehensive Loss - Summary of Accumulated Other Comprehensive Loss (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2020 USD ($)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Balance	$ (4,568)
Foreign currency translation	(2,729)
Reclassification to operations	0
Unrealized losses	0
Pension remeasurement	0
Balance	(7,297)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Balance	475
Foreign currency translation	0
Reclassification to operations	(143)
Unrealized losses	(434)
Pension remeasurement	0
Balance	(102)
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	(645)
Balance	(2,574)
AOCI Attributable to Parent [Member]
Balance	(6,022)
Foreign currency translation	(2,729)
Reclassification to operations	(143)
Unrealized losses	(434)
Pension remeasurement	(645)
Balance	(9,973)
AOCI Attributable to Noncontrolling Interest [Member]
Balance	(1,597)
Foreign currency translation	0
Reclassification to operations	0
Unrealized losses	0
Pension remeasurement	(1,211)
Balance	(2,808)
AOCI Including Portion Attributable to Noncontrolling Interest [Member]
Balance	(7,619)
Foreign currency translation	(2,729)
Reclassification to operations	(143)
Unrealized losses	(434)
Pension remeasurement	(1,856)
Balance	$ (12,781)