Income Taxes	3 Months Ended
Mar. 31, 2012
Income Taxes [Abstract]
Income Taxes	Income Taxes As of December 31, 2011, the Company had unrecognized tax benefits of approximately $1.6 million. There has been no significant change in unrecognized tax benefits through March 31, 2012. Included in the unrecognized tax benefits of $1.6 million at December 31, 2011 was $1.4 million of tax benefits that, if recognized, would reduce the Company’s annual effective tax rate, subject to the valuation allowance. The Company does not expect its unrecognized tax benefits to change significantly over the next 12 months. The Company files income tax returns in the U.S. and in various state jurisdictions with varying statutes of limitations. The Company is no longer subject to income tax examination by tax authorities for years prior to 2006; however, its net operating loss and research credit carry-forwards arising prior to that year are subject to adjustment. The Company’s policy is to recognize interest expense and penalties related to income tax matters as a component of income tax expense. There were no accrued interest and penalties associated with uncertain tax positions as of March 31, 2012 and December 31, 2011.

Income Taxes

3 Months Ended

Mar. 31, 2012

As of December 31, 2011, the Company had unrecognized tax benefits of approximately $1.6 million. There has been no significant change in unrecognized tax benefits through March 31, 2012. Included in the unrecognized tax benefits of $1.6 million at December 31, 2011 was $1.4 million of tax benefits that, if recognized, would reduce the Company’s annual effective tax rate, subject to the valuation allowance. The Company does not expect its unrecognized tax benefits to change significantly over the next 12 months.

The Company files income tax returns in the U.S. and in various state jurisdictions with varying statutes of limitations. The Company is no longer subject to income tax examination by tax authorities for years prior to 2006; however, its net operating loss and research credit carry-forwards arising prior to that year are subject to adjustment. The Company’s policy is to recognize interest expense and penalties related to income tax matters as a component of income tax expense. There were no accrued interest and penalties associated with uncertain tax positions as of March 31, 2012 and December 31, 2011.