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Note 12 - Changes to the Components of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 30, 2019	Mar. 31, 2018	Mar. 30, 2019	Mar. 31, 2018
Balance	$ 768,545	$ 707,381	$ 759,091	$ 682,322
Balance	785,115	722,182	785,115	722,182
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Balance	(13,438)	(13,228)	(12,079)	(9,341)
Other comprehensive income (loss) before reclassifications	394	1,898	(965)	(1,989)
Amounts reclassified from accumulated other comprehensive income
Balance	(13,044)	(11,330)	(13,044)	(11,330)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]
Balance		356	85	466
Other comprehensive income (loss) before reclassifications		(184)		(294)
Amounts reclassified from accumulated other comprehensive income			(85)
Balance		172		172
AOCI Attributable to Parent [Member]
Balance	(13,438)	(12,872)	(11,994)	(8,875)
Other comprehensive income (loss) before reclassifications	394	1,714	(965)	(2,283)
Amounts reclassified from accumulated other comprehensive income			(85)
Balance	$ (13,044)	$ (11,158)	$ (13,044)	$ (11,158)

X

- Definition

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

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