Deposits and Other Assets - Schedule of Deposits and Other Assets (Details) - USD ($) $ in Thousands	Sep. 26, 2020	Dec. 28, 2019
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]
Deposits	$ 165	$ 195
Other	67	77
Total deposits and other assets	$ 232	$ 272

Carrying value of amounts transferred to third parties for security purposes that are expected to be returned or applied towards payment after one year or beyond the operating cycle, if longer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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