Leases Supplemental Lease Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Supplemental Lease Information [Abstract]
Operating Lease, Weighted Average Remaining Lease Term	8 years 3 months 8 days	6 years 3 months 20 days
Finance Lease, Weighted Average Remaining Lease Term	11 years 4 months 5 days	11 years 6 months
Operating Lease, Weighted Average Discount Rate, Percent	6.98%	8.44%
Finance Lease, Weighted Average Discount Rate, Percent	7.27%	6.61%
Operating Lease, Payments	$ 1,228	$ 968
Interest paid for financing leases	343	350
Finance Lease, Principal Payments	$ 1,151	$ 1,038