Income Taxes	3 Months Ended
Mar. 31, 2020
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company applied an estimated annual effective tax rate (“ETR”) approach for calculating a tax provision for interim periods. The Company recorded a provision for income taxes of $28 thousand and provision for income taxes of $39 thousand for the three months ended March 31, 2020 and 2019, respectively. The Company’s ETR was (0.14)% and (0.2)% for the three months ended March 31, 2020, and 2019, respectively. The Company’s ETR for the three months ended March 31, 2020 differs from the U.S. federal statutory tax rate of 21% primarily as a result of nondeductible expenses (including the Nellix contingently issuable common stock), state income taxes, foreign income taxes, and the impact of a full valuation allowance on its deferred tax assets. The Company has evaluated the available evidence supporting the realization of its deferred tax assets, including the amount and timing of future taxable income, and has determined that it is more likely than not that the domestic and foreign deferred tax assets will not be realized. Due to such uncertainties surrounding the realization of the domestic and foreign deferred tax assets, the Company maintained a valuation allowance against a substantial portion of its deferred tax assets as of March 31, 2020. If and when the Company determines that it will be able to realize some portion or all of its deferred tax assets, an adjustment to its valuation allowance on its deferred tax assets would have the effect of increasing net income in the period(s) such determination is made. In December 2019, the FASB issued ASU No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes. ASU 2019-12 simplifies the accounting for income taxes by eliminating certain exceptions to the guidance in ASC 740 related to the approach for intraperiod tax allocation, the methodology for calculating incomes taxes in an interim period and the recognition of deferred tax liabilities for outside basis differences. ASU 2019-12 is effective in 2021 and interim periods within that year, and permits for early adoption. The Company elected to early adopt ASU 2019-12, effective for the quarter ended March 31, 2020, on a prospective approach. Therefore, the Company is no longer applying the exception to the intraperiod tax allocation rules which used to apply when the Company had pre-tax book losses in continuing operations and gains in other components of income. On March 27, 2020, the Coronavirus Aid, Relief, and Economic Security Act (CARES Act) was enacted in response to the COVID-19 pandemic. The CARES Act, among other things, permits NOL carryovers and carrybacks to offset 100% of taxable income for taxable years beginning before 2021. In addition, the CARES Act allows NOLs incurred in 2018, 2019, and 2020 to be carried back to each of the five preceding taxable years to generate a refund of previously paid income taxes. The CARES Act also contained modifications on the limitation of business interest for tax years beginning in 2019 and 2020. The modifications to Section 163(j) increase the allowable business interest deduction from 30% of adjusted taxable income to 50% of adjusted taxable income. The Company is currently evaluating the impact of the CARES Act, but at present does not expect that the provisions of the CARES Act would result in a material impact on the financial statement.

Income Taxes

The Company applied an estimated annual effective tax rate (“ETR”) approach for calculating a tax provision for interim periods. The Company recorded a provision for income taxes of $28 thousand and provision for income taxes of $39 thousand for the three months ended March 31, 2020 and 2019, respectively. The Company’s ETR was (0.14)% and (0.2)% for the three months ended March 31, 2020, and 2019, respectively. The Company’s ETR for the three months ended March 31, 2020 differs from the U.S. federal statutory tax rate of 21% primarily as a result of nondeductible expenses (including the Nellix contingently issuable common stock), state income taxes, foreign income taxes, and the impact of a full valuation allowance on its deferred tax assets.

The Company has evaluated the available evidence supporting the realization of its deferred tax assets, including the amount and timing of future taxable income, and has determined that it is more likely than not that the domestic and foreign deferred tax assets will not be realized. Due to such uncertainties surrounding the realization of the domestic and foreign deferred tax assets, the Company maintained a valuation allowance against a substantial portion of its deferred tax assets as of March 31, 2020. If and when the Company determines that it will be able to realize some portion or all of its deferred tax assets, an adjustment to its valuation allowance on its deferred tax assets would have the effect of increasing net income in the period(s) such determination is made.

In December 2019, the FASB issued ASU No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes. ASU 2019-12 simplifies the accounting for income taxes by eliminating certain exceptions to the guidance in ASC 740 related to the approach for intraperiod tax allocation, the methodology for calculating incomes taxes in an interim period and the recognition of deferred tax liabilities for outside basis differences. ASU 2019-12 is effective in 2021 and interim periods within that year, and permits for early adoption. The Company elected to early adopt ASU 2019-12, effective for the quarter ended March 31, 2020, on a prospective approach. Therefore, the Company is no longer applying the exception to the intraperiod tax allocation rules which used to apply when the Company had pre-tax book losses in continuing operations and gains in other components of income.

On March 27, 2020, the Coronavirus Aid, Relief, and Economic Security Act (CARES Act) was enacted in response to the COVID-19 pandemic. The CARES Act, among other things, permits NOL carryovers and carrybacks to offset 100% of taxable income for taxable years beginning before 2021. In addition, the CARES Act allows NOLs incurred in 2018, 2019, and 2020 to be carried back to each of the five preceding taxable years to generate a refund of previously paid income taxes. The CARES Act also contained modifications on the limitation of business interest for tax years beginning in 2019 and 2020. The modifications to Section 163(j) increase the allowable business interest deduction from 30% of adjusted taxable income to 50% of adjusted taxable income. The Company is currently evaluating the impact of the CARES Act, but at present does not expect that the provisions of the CARES Act would result in a material impact on the financial statement.