Lease Obligations - Additional Information (Details) - USD ($)	9 Months Ended
Sep. 28, 2019	Dec. 30, 2018	Dec. 29, 2018
Lessee Lease Description [Line Items]
Operating lease right of use assets	$ 2,163,000	$ 1,900,000	$ 0
Operating lease liability	2,196,000	$ 1,900,000
Topic 842
Lessee Lease Description [Line Items]
Adjustments to retained earnings	$ 0

Amount of the cumulative effect on retained earnings net of related income tax effect.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 9
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+ References

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- Definition

Present value of lessee's discounted obligation for lease payments from operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977

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Amount of lessee's right to use underlying asset under operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
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