SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Capitalization Policies - (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 30, 2016	Jan. 01, 2016	Dec. 31, 2014
Internally developed software
Capitalized software development costs
Software development costs capitalized	$ 1,279	$ 788	$ 327

Additions made to capitalized computer software costs during the period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275

Name:	us-gaap_CapitalizedComputerSoftwareAdditions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration