Income Taxes	6 Months Ended
Income Taxes	Jun. 30, 2021
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company’s tax provision or benefit from income taxes for interim periods is determined using an estimate of our annual effective tax rate, adjusted for discrete items, if any, that are taken into account in the relevant period. Each quarter we update our estimate of the annual effective tax rate, and if our estimated tax rate changes, we make a cumulative adjustment. No income tax benefit was accrued for jurisdictions where the Company anticipates incurring a loss during the full fiscal year as the related deferred tax assets were fully offset by a valuation allowance. The Company’s resulting effective tax rate differs from the applicable statutory rate primarily due to the valuation allowance against its deferred tax assets. The Company is subject to income taxation through certain of its subsidiaries predominantly in the United States, China, South Korea, and Singapore. Income tax expense for the three months ended June 30, 2021 and 2020 was $0.1 million and $0.1 million, respectively. Income tax expense for the six months ended June 30, 2021 and 2020 was $0.1 million and $0.2 million, respectively. Significant judgment is required in evaluating the Company’s tax positions and determining its provision for income taxes. The impacts of uncertain tax positions are recognized only after determining a more-likely-than-not probability that the uncertain tax positions will not withstand challenge, if any, from the relevant taxing authorities. The Company did not have any material uncertain tax positions as of June 30, 2021 and 2020.

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.