Income Taxes	3 Months Ended
Mar. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes	13. INCOME TAXES: We recorded income tax expense of $134,000 in the three months ended March 31, 2019, compared to an income tax benefit of $83,000 in the three months ended March 31, 2018. Our income tax expense in the three months ended March 31, 2019 reflected an effective income tax rate of approximately 21%, which included $9,000 of excess tax benefits from employee share-based payments. Our income tax benefit in the three months ended March 31, 2018 reflected an effective income tax rates of approximately 32%, which included $35,000 of excess tax benefits from employee share-based payments. Our effective tax rate in the three months ended March 31, 2019 and the three months ended March 31, 2018 was impacted by Global Intangible Low Tax Income (GILTI), U.S. federal R&D tax credits and excess tax benefits from employee share-based payments. We have significant deferred tax assets as a result of temporary differences between taxable income on our tax returns and U.S. GAAP income, research and development tax credit carry forwards and federal, state and foreign net operating loss carry forwards. A deferred tax asset generally represents future tax benefits to be received when temporary differences previously reported in our consolidated financial statements become deductible for income tax purposes, when net operating loss carry forwards could be applied against future taxable income, or when tax credit carry forwards are utilized on our tax returns. We assess the realizability of our deferred tax assets and the need for a valuation allowance based on the guidance provided in current financial accounting standards. Significant judgment is required in determining the realizability of our deferred tax assets. The assessment of whether valuation allowances are required considers, among other matters, the nature, frequency and severity of any current and cumulative losses, forecasts of future profitability, the duration of statutory carry-forward periods, our experience with loss carry forwards not expiring unused and tax planning alternatives. In analyzing the need for valuation allowances, we first considered our history of cumulative operating results for income tax purposes over the past three years in each of the tax jurisdictions in which we operate, our financial performance in recent quarters, statutory carry forward periods and tax planning alternatives. In addition, we considered both our near-term and long-term financial outlook. After considering all available evidence (both positive and negative), we concluded that recognition of valuation allowances for substantially all of our U.S. and Singapore based deferred tax assets was not required. The Inland Revenue Authority of Singapore is reviewing our 2016 and 2015 income tax returns. We anticipate that the outcome of these audits will not have a significant impact on our financial position or results of operations.

Income Taxes

3 Months Ended

Mar. 31, 2019

13. INCOME TAXES:

We recorded income tax expense of $134,000 in the three months ended March 31, 2019, compared to an income tax benefit of $83,000 in the three months ended March 31, 2018. Our income tax expense in the three months ended March 31, 2019 reflected an effective income tax rate of approximately 21%, which included $9,000 of excess tax benefits from employee share-based payments. Our income tax benefit in the three months ended March 31, 2018 reflected an effective income tax rates of approximately 32%, which included $35,000 of excess tax benefits from employee share-based payments. Our effective tax rate in the three months ended March 31, 2019 and the three months ended March 31, 2018 was impacted by Global Intangible Low Tax Income (GILTI), U.S. federal R&D tax credits and excess tax benefits from employee share-based payments.

We have significant deferred tax assets as a result of temporary differences between taxable income on our tax returns and U.S. GAAP income, research and development tax credit carry forwards and federal, state and foreign net operating loss carry forwards. A deferred tax asset generally represents future tax benefits to be received when temporary differences previously reported in our consolidated financial statements become deductible for income tax purposes, when net operating loss carry forwards could be applied against future taxable income, or when tax credit carry forwards are utilized on our tax returns. We assess the realizability of our deferred tax assets and the need for a valuation allowance based on the guidance provided in current financial accounting standards.

Significant judgment is required in determining the realizability of our deferred tax assets. The assessment of whether valuation allowances are required considers, among other matters, the nature, frequency and severity of any current and cumulative losses, forecasts of future profitability, the duration of statutory carry-forward periods, our experience with loss carry forwards not expiring unused and tax planning alternatives. In analyzing the need for valuation allowances, we first considered our history of cumulative operating results for income tax purposes over the past three years in each of the tax jurisdictions in which we operate, our financial performance in recent quarters, statutory carry forward periods and tax planning alternatives. In addition, we considered both our near-term and long-term financial outlook. After considering all available evidence (both positive and negative), we concluded that recognition of valuation allowances for substantially all of our U.S. and Singapore based deferred tax assets was not required.

The Inland Revenue Authority of Singapore is reviewing our 2016 and 2015 income tax returns. We anticipate that the outcome of these audits will not have a significant impact on our financial position or results of operations.