STOCK PLANS - Activity (Details) $ / shares in Units, $ in Millions	3 Months Ended
	Apr. 01, 2018 USD ($) $ / shares shares
RSUs
RSU's
Nonvested at the beginning of the period (in shares) | shares	245,794
Granted (in shares) | shares	217,530
Vested (in shares) | shares	(93,994)
Forfeited (in shares) | shares	(1,560)
Nonvested at the end of the period (in shares) | shares	367,770
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	13.48
Forfeited (in dollars per share) | $ / shares	11.52
Outstanding at the end of the period (in dollars per share) | $ / shares	$ 9.61
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	(2,500)
Outstanding at the end of the period (in shares) | shares	153,675
Weighted Average Exercise Price
Outstanding at the beginning of the period (in dollars per share) | $ / shares	$ 32.12
Expired (in dollars per share) | $ / shares	65.31
Outstanding at the end of the period (in dollars per share) | $ / shares	$ 31.58