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EMPLOYEE STOCK PLANS (Tables)
 3 Months Ended
Mar. 27, 2016
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]  
Schedule of Stock Option Activity
The following table summarizes the stock option activity under all of our equity incentive plans for the three months ended March 27, 2016:
 
Number of Shares
 
Weighted-
Average
Exercise
Price
 
Weighted- Average Remaining Term
 
Aggregate Intrinsic Value
 
(thousands)
 
(per share)
 
(years)
 
(thousands)
Outstanding as of December 31, 2015
4,172

 
$
2.04

 
 
 
 
Exercised
(89
)
 
$
1.59

 
 
 
 
Forfeited or expired
(18
)
 
$
1.12

 
 
 
 
Outstanding as of March 27, 2016
4,065

 
$
2.05

 
3.9
 
$
6,512

Exercisable as of March 27, 2016
2,857

 
$
1.85

 
3.4
 
$
5,160

 
 
 
 
 
 
 
 

The aggregate intrinsic value represents the pre-tax differences between the exercise price of stock options and the quoted market price of our stock on March 27, 2016 for all in-the-money options.

The following table provides supplemental information pertaining to our stock options for the periods indicated (in thousands, except weighted-average fair values):
 
Three Months Ended
 
March 27,
2016
 
March 29,
2015
Weighted-average fair value of options granted, per share
$
—

 
$
1.67

Intrinsic value of options exercised
$
177

 
$
1,940

Cash received from options exercised
$
142

 
$
1,526
Schedule of Restricted Stock Units
The following table summarizes RSU activity under all of our equity incentive plans for the three months ended March 27, 2016:
 
Number of Shares
 
Weighted Average Grant Date Fair Value
 
(thousands)
 
(per share)
Outstanding as of December 31, 2015
1,289

 
$
2.78

Released
(178
)
 
$
2.13

Forfeited
(7
)
 
$
2.95

Outstanding as of March 27, 2016
1,104

 
$
2.88