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Changes in Stockholders' Equity and Accumulated Other Comprehensive Loss (Tables)
 3 Months Ended
Apr. 01, 2017
Stockholders' Equity Note [Abstract]  
Schedule of Changes in Stockholders' Equity and Accumulated other Comprehensive Loss
(In thousands)
Common
stock
 
Additional Paid-in
 capital
 
Accumulated
deficit
 
Accumulated
other
comprehensive
loss
 
Total
Balances, December 31, 2016
$
1,216

 
$
680,315

 
$
(406,945
)
 
$
(4,156
)
 
$
270,430

Net loss for the three months ended April 1, 2017
—

 
—

 
(7,275
)
 
—

 
(7,275
)
Unrealized loss related to marketable securities, net of tax
—

 
—

 
—

 
(43
)
 
(43
)
Recognized loss on redemption of marketable securities, previously unrealized
—

 
—

 
—

 
170

 
170

Translation adjustments, net of tax
—

 
—

 
—

 
274

 
274

Common stock issued in connection with the exercise of stock options, ESPP and vested RSUs, net of tax
4

 
447

 
—

 
—

 
451

Stock-based compensation expense related to stock options, ESPP and RSUs
—

 
3,843

 
—

 
—

 
3,843

Accounting method transition adjustment
—

 
—

 
(355
)
 
—

 
(355
)
Balances, April 1, 2017
$
1,220

 
$
684,605

 
$
(414,575
)
 
$
(3,755
)
 
$
267,495