Income Taxes	9 Months Ended
Sep. 30, 2015
Income Tax Disclosure [Abstract]
Income Taxes	The Company did not record a provision or benefit for income taxes during the three and nine months ended September 30, 2015 and 2014. The Company continues to maintain a full valuation allowance for its net U.S. federal and state deferred tax assets. The Company accounts for uncertain tax positions in accordance with ASC 740, Accounting for Income Taxes. As of September 30, 2015 and 2014, the total amount of unrecognized tax benefits was $1.6 million and $0.5 million, respectively. As of September 30, 2015 and 2014, no amount of the unrecognized tax benefits, if recognized, would reduce the Company’s annual effective tax rate because the benefits are in the form of deferred tax assets for which a full valuation allowance has been recorded. The Company’s policy is to recognize interest and penalties related to unrecognized tax benefits in income tax expense. As of September 30, 2015 and 2014, the Company accrued no interest and penalties in the statement of financial position. Total interest and penalties included in the statements of operations for the three and nine months ended September 30, 2015 and 2014 are each zero. The Company does not expect the amount of existing unrecognized tax benefits to change significantly within the next 12 months. The Company is subject to taxation for U.S. federal and the state of California purposes only. The Company’s federal and California tax returns are open by statute for tax years 2011 and 2010 forward, respectively, and could be subject to examination by the tax authorities.

Income Taxes

9 Months Ended

Sep. 30, 2015

The Company did not record a provision or benefit for income taxes during the three and nine months ended September 30, 2015 and 2014. The Company continues to maintain a full valuation allowance for its net U.S. federal and state deferred tax assets.

The Company accounts for uncertain tax positions in accordance with ASC 740, Accounting for Income Taxes. As of September 30, 2015 and 2014, the total amount of unrecognized tax benefits was $1.6 million and $0.5 million, respectively. As of September 30, 2015 and 2014, no amount of the unrecognized tax benefits, if recognized, would reduce the Company’s annual effective tax rate because the benefits are in the form of deferred tax assets for which a full valuation allowance has been recorded.

The Company’s policy is to recognize interest and penalties related to unrecognized tax benefits in income tax expense. As of September 30, 2015 and 2014, the Company accrued no interest and penalties in the statement of financial position. Total interest and penalties included in the statements of operations for the three and nine months ended September 30, 2015 and 2014 are each zero. The Company does not expect the amount of existing unrecognized tax benefits to change significantly within the next 12 months.

The Company is subject to taxation for U.S. federal and the state of California purposes only. The Company’s federal and California tax returns are open by statute for tax years 2011 and 2010 forward, respectively, and could be subject to examination by the tax authorities.