3. Noncompetition Agreements (Details) - USD ($) $ in Thousands	Jun. 27, 2020	Dec. 28, 2019
Compensation Related Costs [Abstract]
Current non-compete	$ 848	$ 848
Long-term non-compete	718	1,089
Total non-compete	$ 1,566	$ 1,937

Gross carrying amount before accumulated amortization as of the balance sheet date of payments made to third parties in exchange for their agreement not to engage in specified competitive practices in specified geographic territories for a specified period of time.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

Name:	us-gaap_FiniteLivedNoncompeteAgreementsGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant