Note 11 - Accumulated Other Comprehensive Loss - Summary of Accumulated Other Comprehensive Loss (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2021 USD ($)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Balance	$ (4,529)
Foreign currency translation	(2,147)
Reclassification to operations	0
Pension remeasurement	0
Balance	(6,676)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Balance	(8)
Foreign currency translation	0
Reclassification to operations	8
Pension remeasurement	0
Balance	0
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Balance	(2,749)
Foreign currency translation	0
Reclassification to operations	0
Pension remeasurement	(647)
Balance	(3,396)
AOCI Attributable to Parent [Member]
Balance	(7,286)
Foreign currency translation	(2,147)
Reclassification to operations	8
Pension remeasurement	(647)
Balance	(10,072)
AOCI Attributable to Noncontrolling Interest [Member]
Balance	(3,071)
Foreign currency translation	0
Reclassification to operations	0
Pension remeasurement	(443)
Balance	(3,514)
AOCI Including Portion Attributable to Noncontrolling Interest [Member]
Balance	(10,357)
Foreign currency translation	(2,147)
Reclassification to operations	8
Pension remeasurement	(1,090)
Balance	$ (13,586)