Income Taxes

6 Months Ended

Jun. 30, 2015

Income Tax Disclosure [Abstract]

Income Taxes

15. Income Taxes

In the six months ended June 30, 2015 and 2014, the Company recorded tax expenses related to state franchise taxes only, and did not record income tax expenses due to the availability of deferred tax assets to offset any taxable income in the US (at the federal and state level to the extent applicable) and the UK. The Company has established a full valuation allowance against the Company’s deferred tax assets based on an assessment that the criteria that deferred tax assets will more likely than not be realized has not yet been met. During the six months ended June 30, 2015 and 2014, the Company’s effective tax rates were de minimis.

The Company’s major tax jurisdictions are (i) US (federal), (ii) California (state), (iii) New York (state) and (iv) UK. Tax returns remain open to examination by the applicable governmental authorities for tax years 2011 through 2014. The federal and state taxing authorities may choose to audit tax returns for prior years due to significant tax attribute carryforwards for those prior years. However, such audits will be limited to adjustments to such carryforward tax attributes. The Company is not currently being audited in any tax jurisdiction.