As of March 31, 2014

Amortized
Cost

Gross
Unrealized
Gains

Gross
Unrealized
Losses

Fair
Value

Municipal obligations

$

402

$

8

$

—

$

410

U.S. government securities funds

999

—

(14

)

985

Equity securities

227

397

(7

)

617

Total short-term investment securities

$

1,628

$

405

$

(21

)

$

2,012

As of December 31, 2013

Amortized
Cost

Gross
Unrealized
Gains

Gross
Unrealized
Losses

Fair
Value

Municipal obligations

$

403

$

12

$

—

$

415

U.S. government securities funds

997

—

(14

)

983

Equity securities

227

386

(5

)

608

Total short-term investment securities

$

1,627

$

398

$

(19

)

$

2,006