ORGANIZATION AND BASIS OF PRESENTATION (Initial Public Offering Narrative) (Details) $ in Millions		9 Months Ended
	Sep. 29, 2014 USD ($) shares	Sep. 30, 2020 segment
Subsidiary, Sale of Stock [Line Items]
Number of reportable segments | segment		1
Common Class A
Subsidiary, Sale of Stock [Line Items]
Proceeds from initial public offering | $	$ 100.4
Issuance of Class A shares in initial public offering, net of underwriters discount (in shares)	600,000
Percentage of common stock owned by LLC personnel for voting rights entitlement, minimum	10.00%
Common Class B
Subsidiary, Sale of Stock [Line Items]
Issuance of Class A shares in initial public offering, net of underwriters discount (in shares)	10
Voting rights multiplier upon LLC ownership threshold	10