STOCK PLANS (Tables)

3 Months Ended

Apr. 01, 2018

STOCK PLANS

Summary of the restricted stock units ("RSUs") activity

		Weighted
		Average Grant
		Date Fair
	RSUs	Value
Nonvested — December 31, 2017	245,794	$	11.55
Granted	217,530	$	9.10
Vested	(93,994)	$	13.48
Forfeited	(1,560)	$	11.52
Nonvested — April 1, 2018	367,770	$	9.61

Summary of the stock appreciation rights ("SARs") activity

The following table summarizes the stock appreciation rights (“SARs”) activity during the three months ended April 1, 2018: 

		Weighted		Aggregate
		Average		Intrinsic Value
	SARs	Exercise Price		(in thousands)
Outstanding December 31, 2017	156,175	$	32.12	$	—
Expired	(2,500)	$	65.31
Outstanding April 1, 2018	153,675	$	31.58	$	—

Summary of stock-based compensation expense

	Three Months Ended
	April 1,		March 26,
(in thousands)	2018		2017
Stock-based compensation expense	$	741	$	1,029