Commitments and Contingencies (Tables)

6 Months Ended

Jun. 28, 2019

Commitments and Contingencies Disclosure [Abstract]

Summary of Warranty Accrual Included in Accrued Liabilities

Activity for the Company’s warranty accrual, which is included in “Accrued and other current liabilities”, is summarized below (in thousands):

	Three months ended						Six months ended
	June 28, 2019			June 29, 2018			June 28, 2019			June 29, 2018
Balance at beginning of period	$	4,587		$	4,522		$	4,869		$	4,381
Accrual for current period warranties	1,570			1,714			2,973			3,450
Warranty costs incurred	(1,355		)	(1,589		)	(3,040		)	(3,184		)
Balance at end of period	$	4,802		$	4,647		$	4,802		$	4,647