Inventories (Schedule of inventory reserve) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Jan. 01, 2022
Inventories [Roll Forward]
Balance, beginning of year	$ 4,784	$ 5,742
Additions to reserve during the year	10,779	5,854
Reserves applied and inventories written off during the year	(8,061)	(6,812)
Balance, end of year	$ 7,502	$ 4,784