Marketable Securities	3 Months Ended
Mar. 31, 2012
Marketable Securities	2. Marketable Securities The Company has classified its marketable securities as available-for-sale and, accordingly, carries such securities at fair value. At March 31, 2012, all of the Company’s marketable securities consisted of United States government or agency securities. At March 31, 2012, the aggregate fair value and amortized cost of the Company’s marketable securities were $89,532,000 and 89,547,000, respectively. Gross unrealized gains and losses were $10,000 and $25,000, respectively, at March 31, 2012. At December 31, 2011, the Company had no marketable securities.

Marketable Securities

3 Months Ended

Mar. 31, 2012

2. Marketable Securities

The Company has classified its marketable securities as available-for-sale and, accordingly, carries such securities at fair value. At March 31, 2012, all of the Company’s marketable securities consisted of United States government or agency securities.

At March 31, 2012, the aggregate fair value and amortized cost of the Company’s marketable securities were $89,532,000 and 89,547,000, respectively. Gross unrealized gains and losses were $10,000 and $25,000, respectively, at March 31, 2012.

At December 31, 2011, the Company had no marketable securities.