SHARE-BASED COMPENSATION - Options (Details) - Stock options - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended		12 Months Ended
	Oct. 01, 2016	Oct. 03, 2015	Jan. 02, 2016
SHARE-BASED COMPENSATION
Vesting period	3 years
Contractual term	7 years
Valuation Assumptions:
Weighted-average fair value of options granted (in dollars per share)		$ 15.92
Expected volatility (as a percent)		76.50%
Weighted-average volatility (as a percent)		58.70%
Expected term (in years)		4 years 2 months 12 days
Risk-free rate (as a percent)		1.90%
Expected annual forfeiture (as a percent)		15.30%
Shares
Outstanding at the beginning of the period (in shares)	905,883
Exercised (in shares)	(136,875)
Cancelled/expired (in shares)	(11,348)
Outstanding at end of the period (in shares)	757,660		905,883
Vested or expected to vest at the end of the period (in shares)	739,220
Exercisable at the end of the period (in shares)	632,072
Weighted Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)	$ 15.35
Exercised (in dollars per share)	17.28
Cancelled/expired (in dollars per share)	24.97
Outstanding at the end of the period (in dollars per share)	14.86		$ 15.35
Vested or expected to vest at the end of the period (in dollars per share)	14.38
Exercisable at the end of the period (in dollars per share)	$ 11.00
Weighted Average Remaining Contractual Term
Outstanding at the end of the period	2 years 7 months 6 days		3 years 4 months 24 days
Vested or expected to vest at the end of the period	2 years 6 months
Exercisable at the end of the period	2 years
Aggregate Intrinsic Value
Outstanding at the beginning of the period (in dollars)	$ 5,686
Exercised (in dollars)	719
Outstanding at the end of the period (in dollars)	4,948		$ 5,686
Vested or expected to vest at the end of the period (in dollars)	4,948
Exercisable at the end of the period (in dollars)	$ 4,948
Additional disclosure
Nonvested stock options outstanding (in shares)	100,000
Weighted average grant date fair value per award for nonvested stock options (in dollars per share)	$ 15.90
Total unrecognized compensation cost related to nonvested stock options granted	$ 1,400
Weighted average recognition period of unrecognized stock-based compensation expense	1 year 4 months 24 days
Fair value of shares vested under stock option plans	$ 2,300	$ 2,300