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Fair Value of Financial Instruments (Tables)
6 Months Ended
Jul. 01, 2017
Fair Value Disclosures [Abstract]  
Schedule of Fair Value of Financial Instruments
 
Fair value measurements as of
 
Fair value measurements as of
 
July 1, 2017
 
December 31, 2016
(In thousands)
Total
 
Level 1
 
Level 2
 
Level 3
 
Total
 
Level 1
 
Level 2
 
Level 3
Short-term marketable securities
$
10,470

 
$
10,382

 
$
88

 
$

 
$
10,308

 
$
10,230

 
$
78

 
$

Foreign currency forward exchange contracts, net
26

 

 
26

 

 
184

 

 
184

 

Total fair value of financial instruments
$
10,496

 
$
10,382

 
$
114

 
$

 
$
10,492

 
$
10,230

 
$
262

 
$