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Note 18 - Stockholders' Equity - Components of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Balance	$ 13,431
Foreign currency translation adjustments, net of tax expense of $0 and tax benefit of $104 in 2020 and 2019, respectively	(224)	$ 344
Balance	14,775	13,431
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Balance	(10,623)	(10,967)
Foreign currency translation adjustments, net of tax expense of $0 and tax benefit of $104 in 2020 and 2019, respectively	(224)	344
Net actuarial loss for the year, net of tax	0	0
Amortization for the year, net of tax	0	0
Balance	(10,847)	(10,623)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Balance	(13,428)	(13,875)
Foreign currency translation adjustments, net of tax expense of $0 and tax benefit of $104 in 2020 and 2019, respectively	0	0
Net actuarial loss for the year, net of tax	(1,054)	(64)
Amortization for the year, net of tax	631	511
Balance	(13,851)	(13,428)
AOCI Attributable to Parent [Member]
Balance	(24,051)	(24,842)
Foreign currency translation adjustments, net of tax expense of $0 and tax benefit of $104 in 2020 and 2019, respectively	(224)	344
Net actuarial loss for the year, net of tax	(1,054)	(64)
Amortization for the year, net of tax	631	511
Balance	$ (24,698)	$ (24,051)

Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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