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Marketable Securities
 6 Months Ended
Jun. 30, 2019
Investments, Debt and Equity Securities [Abstract]  
Marketable Securities MARKETABLE SECURITIES
The Company accounts for its marketable securities as available for sale (“AFS”). The Company recorded $0.6 million and $2.8 million of net unrealized gains and net unrealized losses, respectively, in Accumulated other comprehensive income (“AOCI”) as of June 30, 2019, and December 30, 2018, respectively.
The following tables present the amortized cost, gross unrealized gains and losses, and fair market value of our AFS debt securities as of June 30, 2019, and December 30, 2018:
 
 
June 30, 2019
(In thousands)
 
Amortized Cost
 
Gross unrealized gains
 
Gross unrealized losses
 
Fair Value
Short-term AFS securities
 
 
 
 
 
 
 
 
U.S. Treasury securities
 
$
144,518

 
$
73

 
$
(111
)
 
$
144,480

Corporate debt securities
 
120,936

 
117

 
(116
)
 
120,937

U.S. governmental agency securities
 
108,911

 
29

 
(120
)
 
108,820

Commercial paper
 
35,063

 
—

 
—

 
35,063

Certificates of deposit
 
18,497

 
—

 
—

 
18,497

Total short-term AFS securities
 
$
427,925

 
$
219

 
$
(347
)
 
$
427,797

Long-term AFS securities
 
 
 
 
 
 
 

Corporate debt securities
 
$
103,793

 
$
748

 
$
(64
)
 
$
104,477

U.S. governmental agency securities
 
31,247

 
38

 
(8
)
 
31,277

U.S. Treasury securities
 
27,098

 
81

 
(22
)
 
27,157

Total long-term AFS securities
 
$
162,138

 
$
867

 
$
(94
)
 
$
162,911


 
 
December 30, 2018
(In thousands)
 
Amortized Cost
 
Gross unrealized gains
 
Gross unrealized losses
 
Fair Value
Short-term AFS securities
 
 
 
 
 
 
 
 
U.S. Treasury securities
 
$
107,717

 
$
—

 
$
(232
)
 
$
107,485

Corporate debt securities
 
140,631

 
1

 
(464
)
 
140,168

U.S. governmental agency securities
 
92,628

 
—

 
(654
)
 
91,974

Commercial paper
 
8,177

 
—

 
—

 
8,177

Certificates of deposit
 
23,497

 
—

 
—

 
23,497

Total short-term AFS securities
 
$
372,650

 
$
1

 
$
(1,350
)
 
$
371,301

Long-term AFS securities
 
 
 
 
 
 
 
 
Corporate debt securities
 
$
130,612

 
$
44

 
$
(1,032
)
 
$
129,624

U.S. governmental agency securities
 
37,362

 
3

 
(168
)
 
37,197

U.S. Treasury securities
 
47,079

 
5

 
(347
)
 
46,737

Total long-term AFS securities
 
$
215,053

 
$
52

 
$
(1,547
)
 
$
213,558


The following tables represent the AFS securities as of June 30, 2019, and December 30, 2018, that were in an unrealized loss position, aggregated by investment category and the length of time that individual securities have been in a continuous loss position:
 
 
June 30, 2019
 
 
Less than 12 Months
 
12 Months or Greater
 
Total
(In thousands)
 
Fair Value
 
Gross unrealized losses
 
Fair Value
 
Gross unrealized losses
 
Fair Value
 
Gross unrealized losses
Short-term AFS securities
 
 
 
 
 
 
 
 
 
 
 
 
U.S. Treasury securities
 
$
8,750

 
$
(2
)
 
$
37,911

 
$
(109
)
 
$
46,661

 
$
(111
)
Corporate debt securities
 
7,159

 
(2
)
 
46,538

 
(114
)
 
53,697

 
(116
)
U.S. governmental agency securities
 
9,743

 
(14
)
 
77,799

 
(106
)
 
87,542

 
(120
)
Total short-term AFS securities
 
$
25,652

 
$
(18
)
 
$
162,248

 
$
(329
)
 
$
187,900

 
$
(347
)
Long-term AFS securities
 
 
 
 
 
 
 
 
 
 
 
 
Corporate debt securities
 
$
25,839

 
$
(54
)
 
$
10,761

 
$
(10
)
 
$
36,600

 
$
(64
)
U.S. governmental agency securities
 
—

 
—

 
5,992

 
(8
)
 
5,992

 
(8
)
U.S. Treasury securities
 
10,988

 
(20
)
 
1,101

 
(2
)
 
12,089

 
(22
)
Total long-term AFS securities
 
$
36,827

 
$
(74
)
 
$
17,854

 
$
(20
)
 
$
54,681

 
$
(94
)
 
 
December 30, 2018
 
 
Less than 12 Months
 
12 Months or Greater
 
Total
(In thousands)
 
Fair Value
 
Gross unrealized losses
 
Fair Value
 
Gross unrealized losses
 
Fair Value
 
Gross unrealized losses
Short-term AFS securities
 
 
 
 
 
 
 
 
 
 
 
 
U.S. Treasury securities
 
$
70,830

 
$
(31
)
 
$
28,207

 
$
(201
)
 
$
99,037

 
$
(232
)
Corporate debt securities
 
76,886

 
(115
)
 
61,459

 
(349
)
 
138,345

 
(464
)
U.S. governmental agency securities
 
11,664

 
(4
)
 
80,311

 
(650
)
 
91,975

 
(654
)
Certificates of deposit
 
1,599

 
—

 
—

 
—

 
1,599

 
—

Total short-term AFS securities
 
$
160,979

 
$
(150
)
 
$
169,977

 
$
(1,200
)
 
$
330,956

 
$
(1,350
)
Long-term AFS securities
 
 
 
 
 
 
 
 
 
 
 
 
Corporate debt securities
 
$
81,655

 
$
(570
)
 
$
27,265

 
$
(462
)
 
$
108,920

 
$
(1,032
)
U.S. governmental agency securities
 
21,579

 
(36
)
 
11,868

 
(132
)
 
33,447

 
(168
)
U.S. Treasury securities
 
20,479

 
(29
)
 
23,762

 
(318
)
 
44,241

 
(347
)
Total long-term AFS securities
 
$
123,713

 
$
(635
)
 
$
62,895

 
$
(912
)
 
$
186,608

 
$
(1,547
)

We conduct an other-than-temporary impairment (“OTTI”) analysis on a quarterly basis or more often if a potential loss-triggering event occurs. We consider factors such as the duration, severity and the reason for the decline in value, the potential recovery period and whether we intend to sell. We also consider whether (i) it is more likely than not that we will be required to sell the debt securities before recovery of their amortized cost basis and (ii) the amortized cost basis cannot be recovered as a result of credit losses.
As of June 30, 2019, we did not intend to sell and it was not likely that we would be required to sell these investments before recovery of their amortized cost basis, which may be at maturity. Unrealized losses related to these investments are primarily due to interest rate fluctuations as opposed to changes in credit quality. Therefore, as of June 30, 2019, we have recognized no OTTI loss.
As of June 30, 2019, our short-term and long-term marketable securities had remaining maturities of less than 1 month to 12 months and 13 months to 34 months, respectively. See Note 9 for more information regarding the fair value of our marketable securities.