6. Employee Retirement Benefit Plans (Tables)

9 Months Ended

Sep. 27, 2019

Table Text Block Supplement [Abstract]

Schedule of Net Periodic Benefit Cost

Components of Net Periodic Benefit Expense

	Supplemental Executive
	Retirement Plan
	September 27,		September 28,
For the nine months ended:	2019		2018
Interest cost	$	110	$	103
Amortization of actuarial loss		60		60
Net periodic benefit expense	$	170	$	163

	Supplemental Executive
	Retirement Plan
	September 27,		September 28,
For the three months ended:	2019		2018
Interest cost	$	37	$	35
Amortization of actuarial loss		20		20
Net periodic benefit expense	$	57	$	55