STOCK PLANS - Activity (Details) $ / shares in Units, $ in Millions	6 Months Ended
	Jul. 01, 2018 USD ($) $ / shares shares
RSUs
RSU's
Nonvested at the beginning of the period (in shares) | shares	245,794
Granted (in shares) | shares	218,580
Vested (in shares) | shares	(99,244)
Forfeited (in shares) | shares	(2,490)
Nonvested at the end of the period (in shares) | shares	362,640
Weighted Average Grant Date Fair Value
Outstanding at the beginning of the period (in dollars per share) | $ / shares	$ 11.55
Granted (in dollars per share) | $ / shares	9.10
Vested (in dollars per share) | $ / shares	13.31
Forfeited (in dollars per share) | $ / shares	11.41
Outstanding at the end of the period (in dollars per share) | $ / shares	$ 9.59
Additional disclosures
Total fair value | $	$ 0.9
Stock options and SARs
Options/SARs
Outstanding at the beginning of the period (in shares) | shares	156,175
Expired (in shares) | shares	(24,825)
Outstanding at the end of the period (in shares) | shares	131,350
Weighted Average Exercise Price
Outstanding at the beginning of the period (in dollars per share) | $ / shares	$ 32.12
Expired (in dollars per share) | $ / shares	38.60
Outstanding at the end of the period (in dollars per share) | $ / shares	$ 30.89