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Investments (Tables)
 3 Months Ended
Mar. 24, 2013
Investments, Debt and Equity Securities [Abstract]  
Summary of Available-for-Sale Securities
Available-for-sale securities as of March 24, 2013 are summarized as follows (in thousands):
 
 
Amortized Costs
 
 
Gross Unrealized Gain
 
 
Gross Unrealized Loss
 
 
Net Unrealized Gain
 
 
Market Value
 
Short-Term Investments:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Corporate debt  
 
$
—
 
 
$
13
 
 
$
—
 
 
$
13
 
 
$
13
 
U.S. government and agency obligations  
 
 
15,033
 
 
 
12
 
 
 
—
 
 
 
12
 
 
 
15,045
 
Total short-term investments  
 
$
15,033
 
 
$
25
 
 
$
—
 
 
$
25
 
 
$
15,058
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Equity securities  
 
$
11,631
 
 
$
3,931
 
 
$
(152
)
 
$
3,779
 
 
$
15,410
 


Available-for-sale securities as of June 24, 2012 are summarized as follows (in thousands):
 
 
Amortized Costs
 
 
Gross Unrealized Gain
 
 
Gross Unrealized Loss
 
 
Net Unrealized Gain
 
 
Market Value
 
Short-Term Investments:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Corporate debt  
 
$
6,045
 
 
$
26
 
 
$
—
 
 
$
26
 
 
$
6,071
 
U.S. government and agency obligations  
 
 
57,796
 
 
 
10
 
 
 
(5
)
 
 
5
 
 
 
57,801
 
Total short-term investments  
 
$
63,841
 
 
$
36
 
 
$
(5
)
 
$
31
 
 
$
63,872
 
Long-Term Investments:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U.S. government and agency obligations  
 
$
15,053
 
 
$
7
 
 
$
(6
)
 
$
1
 
 
$
15,054
 
Total long-term investments  
 
$
15,053
 
 
$
7
 
 
$
(6
)
 
$
1
 
 
$
15,054
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Equity securities  
 
$
11,631
 
 
$
3,848
 
 
$
—
 
 
$
3,848
 
 
$
15,479
 
Other-Than-Temporary Impairments
The following table provides the Company's other-than-temporary impairments for equity and mortgage-backed securities for the three and nine months ended March 24, 2013 and March 25, 2012 (in thousands):

 
Three Months Ended
Nine Months Ended
 
March 24, 2013
March 25, 2012
March 24, 2013
March 25, 2012
Privately held domestic company-common and preferred stock
$
―
$
―
$
―
$
1,504
Privately held company-note receivable
350
―
350
―
Publicly traded foreign company(s)-common stock
―
―
―
850
Mortgage-backed security  
―
―
―
29
Total other-than-temporary impairments
$
350
$
―
$
350
$
2,383
Fair Value and Gross Unrealized Losses Related to Available-for-sale Securities
The unrealized loss position is measured and determined at each fiscal quarter end.  The following tables summarize the fair value and gross unrealized losses related to available-for-sale investments, aggregated by type of investment and length of time that individual securities have been held (in thousands):
 
 
Securities held
in a loss position
for less than
12 months at
March 24, 2013
 
 
Securities held
in a loss position
for 12 months
or more at
March 24, 2013
 
 
Total in a loss position
at March 24, 2013
 
 
 
Market
Value
 
 
Gross
Unrealized
Losses
 
 
Market
Value
 
 
Gross
Unrealized
Losses
 
 
Market
Value
 
 
Gross
Unrealized
Losses
 
Equity securities  
 
$
4,631
 
 
$
(152
)
 
$
—
 
 
$
—
 
 
$
4,631
 
 
$
(152
)
Total  
 
$
4,631
 
 
$
(152
)
 
$
—
 
 
$
—
 
 
$
4,631
 
 
$
(152
)


 
 
Securities held
in a loss position
for less than
12 months at
June 24, 2012
 
 
Securities held
in a loss position
for 12 months
or more at
June 24, 2012
 
 
Total in a loss position
at June 24, 2012
 
 
 
Market
Value
 
 
Gross
Unrealized
Losses
 
 
Market
Value
 
 
Gross
Unrealized
Losses
 
 
Market
Value
 
 
Gross
Unrealized
Losses
 
U.S government and agency obligations
 
$
46,420
 
 
$
(11
)
 
$
—
 
 
$
—
 
 
$
46,420
 
 
$
(11
)
Total                                                          
 
$
46,420
 
 
$
(11
)
 
$
—
 
 
$
—
 
 
$
46,420
 
 
$
(11
)
Amortized Cost and Estimated Fair Value of Investments by Contractual Maturity
The amortized cost and estimated fair value of investments at March 24, 2013, by contractual maturity, are as follows (in thousands):
 
 
Amortized
Cost
 
 
Estimated
Market Value
 
Due in 1 year or less  
 
$
15,053
 
 
$
15,058
 
Total investments  
 
$
15,053
 
 
$
15,058
 
Investments Measured at Fair Value on a Recurring Basis
The following tables present the balances of investments measured at fair value on a recurring basis (in thousands):
 
 
As of March 24, 2013
 
 
 
Total
 
 
Level 1
 
 
Level 2
 
 
Level 3
 
Corporate debt  
 
$
13
 
 
$
—
 
 
$
13
 
 
$
—
 
U.S. government and agency obligations  
 
 
15,045
 
 
 
6,005
 
 
 
9,040
 
 
 
—
 
Equity securities-strategic investments  
 
 
15,410
 
 
 
15,410
 
 
 
—
 
 
 
—
 
Total securities at fair value  
 
$
30,468
 
 
$
21,415
 
 
$
9,053
 
 
$
—
 

 
 
As of June 24, 2012
 
 
 
Total
 
 
Level 1
 
 
Level 2
 
 
Level 3
 
Corporate debt  
 
$
6,071
 
 
$
—
 
 
$
6,071
 
 
$
—
 
U.S. government and agency obligations  
 
 
72,855
 
 
 
43,059
 
 
 
29,796
 
 
 
—
 
Equity securities-strategic investments  
 
 
15,479
 
 
 
15,479
 
 
 
—
 
 
 
—
 
Total securities at fair value  
 
$
94,405
 
 
$
58,538
 
 
$
35,867
 
 
$
—