Summary of Significant Accounting Policies and Other Information (Details Textual) - USD ($) $ in Thousands	Mar. 30, 2019	Dec. 30, 2018
Accounting Policies [Abstract]
Right of use lease assets, net	$ 24,725	$ 26,100
Non-current operating lease liabilities	$ 19,950	$ 29,400

Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent.

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

Name:	us-gaap_OperatingLeaseLiabilityNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant