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Note 11 - Accumulated Other Comprehensive (Loss) Income - Components of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020
Balance	$ 1,186,560	$ 1,165,476	$ 1,159,493
Balance	1,227,073	1,186,560	1,165,476
AOCI Attributable to Parent [Member]
Balance	(668)	(1,593)	337
Foreign currency translation adjustment	488	925	(1,930)
Balance	$ (180)	$ (668)	$ (1,593)

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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