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Cash, cash equivalents and short-term investments (Tables)
12 Months Ended
Dec. 28, 2018
Cash and Cash Equivalents [Abstract]  
Schedule of Cash, Cash Equivalents and Short-Term Investments
Cash, cash equivalents and short-term investments consisted of the following as of December 28, 2018:
 
 
 
Amortized
 
 
Unrealized
 
 
Unrealized
 
 
Estimated
 
(In thousands)
 
Cost
 
 
Gains
 
 
Losses
 
 
Fair Value
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Classified as current assets:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Cash
 
$
120,846
 
 
$
-
 
 
$
-
 
 
$
120,846
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Cash equivalents:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Money market securities
 
 
6,213
 
 
 
-
 
 
 
-
 
 
 
6,213
 
Total cash equivalents
 
 
6,213
 
 
 
-
 
 
 
-
 
 
 
6,213
 
Total cash and cash equivalents
 
 
127,059
 
 
 
-
 
 
 
-
 
 
 
127,059
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Short-term investments:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U.S. Treasury and agency securities
 
 
81,634
 
 
 
91
 
 
 
(230
)
 
 
81,495
 
Total short-term investments
 
 
81,634
 
 
 
91
 
 
 
(230
)
 
 
81,495
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Total cash, cash equivalents and short-term investments
 
$
208,693
 
 
$
91
 
 
$
(230
)
 
$
208,554
 
 
Cash, cash equivalents and short-term investments consisted of the following as of December 29, 2017:
 
 
 
Amortized
 
 
Unrealized
 
 
Unrealized
 
 
Estimated
 
(In thousands)
 
Cost
 
 
Gains
 
 
Losses
 
 
Fair Value
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Classified as current assets:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Cash
 
$
115,052
 
 
$
-
 
 
$
-
 
 
$
115,052
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Cash equivalents:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Money market securities
 
 
9,742
 
 
 
-
 
 
 
-
 
 
 
9,742
 
Total cash equivalents
 
 
9,742
 
 
 
-
 
 
 
-
 
 
 
9,742
 
Total cash and cash equivalents
 
 
124,794
 
 
 
-
 
 
 
-
 
 
 
124,794
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Short-term investments:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U.S. Treasury and agency securities
 
 
71,997
 
 
 
-
 
 
 
(393
)
 
 
71,604
 
Total short-term investments
 
 
71,997
 
 
 
-
 
 
 
(393
)
 
 
71,604
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Total cash, cash equivalents and short-term investments
 
$
196,791
 
 
$
-
 
 
$
(393
)
 
$
196,398