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Note 10 - Accumulated Other Comprehensive Income (Loss) - Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Balance	$ 813,431	$ 587,740	$ 644,356	$ 585,790
Balance	831,977	601,249	831,977	601,249
AOCI Attributable to Parent [Member]
Balance	(10,096)	(9,998)	(3,420)	(7,018)
Balance	(8,115)	(9,634)	(8,115)	(9,634)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Other comprehensive income (loss) before reclassifications	2,030	364	(4,812)	(2,616)
Amounts reclassified from accumulated other comprehensive loss	0	0	0	0
Net current-period other comprehensive income (loss)	2,030	364	(4,812)	(2,616)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]
Other comprehensive income (loss) before reclassifications	(49)	0	117	0
Amounts reclassified from accumulated other comprehensive loss	0	0	0	0
Net current-period other comprehensive income (loss)	$ (49)	$ 0	$ 117	$ 0

X

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Amount after tax, before reclassification adjustments, of other comprehensive income (loss), attributable to parent.

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