Income Taxes

9 Months Ended

Sep. 30, 2011

Income Taxes [Abstract]

Income Taxes

9.   Income Taxes

For the three and nine months ended September 30, 2011 and 2010, the Company incurred net losses for tax purposes and recognized a full valuation allowance against deferred tax assets.  For the three and nine months ended September 30, 2011, the Company recognized income tax expense of $0.6 million and an income tax benefit of $0.5 million, respectively, in connection with the net tax effect of the change in the Company's unrealized gain/(loss) on "available-for-sale" marketable securities, which is included in other comprehensive loss.  For the three and nine months ended September 30, 2010, no provision or benefit for income taxes was recorded.