Short-Term Investments

6 Months Ended

Jun. 30, 2011

Short-Term Investments

Short-Term Investments

NOTE 6 — SHORT-TERM INVESTMENTS

As of June 30, 2011, short-term investments consisted solely of certificates of deposit securing the Company's obligations under its office leases. As of December 31, 2010, short-term investments consisted solely of United States treasury notes maturing in April 2011 and certificates of deposit securing the Company's obligations under its office leases. The amortized cost, gross unrealized gain and estimated fair value of short-term investments at December 31, 2010 were $100.0 million, $0.0 million and $100.0 million, respectively.