As of June 30, 2012

Amortized
Cost

Gross
Unrealized
Gains

Gross
Unrealized
Losses

Fair
Value

Municipal obligations

$

827

$

40

$

—

$

867

U.S. government securities funds

991

—

(7

)

984

Equity securities

227

208

(6

)

429

Total short-term investment securities

$

2,045

$

248

$

(13

)

$

2,280

As of December 31, 2011

Amortized
Cost

Gross
Unrealized
Gains

Gross
Unrealized
Losses

Fair
Value

Municipal obligations

$

1,158

$

51

$

—

$

1,209

U.S. government securities funds

988

—

(5

)

983

Short-term deposits

3,104

—

—

3,104

Equity securities

227

159

(5

)

381

Total short-term investment securities

$

5,477

$

210

$

(10

)

$

5,677