Leases Supplemental Lease Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 28, 2019	Sep. 29, 2018
Supplemental Lease Information [Abstract]
Operating Lease, Weighted Average Remaining Lease Term	6 years 2 months 12 days
Finance Lease, Weighted Average Remaining Lease Term	11 years 9 months 17 days
Operating Lease, Weighted Average Discount Rate, Percent	8.51%
Finance Lease, Weighted Average Discount Rate, Percent	6.69%
Operating Lease, Payments	$ 2,534
Interest paid for financing leases	1,039	$ 598
Finance Lease, Principal Payments	$ 3,122