Note 8 - Guarantees and Other Obligations (Tables)

6 Months Ended

Jun. 30, 2018

Notes Tables

Schedule of Product Warranty Liability [Table Text Block]

	Three Months Ended						Six Months Ended
	June 30,			June 24,			June 30,			June 24,
	2018			2017			2018			2017
Balance at beginning of period	$	4,916		$	4,945		$	4,848		$	4,350
Warranty expense accruals		1,806			1,990			3,388			3,726
Warranty payments		(1,774	)		(1,865	)		(3,288	)		(3,056	)
Warranty liability assumed		-			-			-			50
Balance at end of period	$	4,948		$	5,070		$	4,948		$	5,070