Note 11 - Accumulated Other Comprehensive Loss - Summary of Accumulated Other Comprehensive Loss (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Balance	$ (4,529)
Foreign currency translation	(1,092)
Reclassification to operations	0
Unrealized gains (loss)	0
Pension remeasurement	0
Balance	(5,621)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Balance	(8)
Foreign currency translation	0
Reclassification to operations	8
Unrealized gains (loss)	0
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
Unrealized gains (loss)	0
Pension remeasurement	(315)
Balance	(3,064)
AOCI Attributable to Parent [Member]
Balance	(7,286)
Foreign currency translation	(1,092)
Reclassification to operations	8
Unrealized gains (loss)	0
Pension remeasurement	(315)
Balance	(8,685)
AOCI Attributable to Noncontrolling Interest [Member]
Balance	(3,071)
Foreign currency translation	0
Reclassification to operations	0
Unrealized gains (loss)	0
Pension remeasurement	(69)
Balance	(3,140)
AOCI Including Portion Attributable to Noncontrolling Interest [Member]
Balance	(10,357)
Foreign currency translation	(1,092)
Reclassification to operations	8
Unrealized gains (loss)	0
Pension remeasurement	(384)
Balance	$ (11,825)