	Three Months Ended						Nine Months Ended
	September 26,			September 30,			September 26,			September 30,
	2020			2019			2020			2019
Income before income taxes	$	8,927		$	6,908		$	12,341		$	21,824
Provision for income taxes	$	836		$	348		$	1,230		$	2,162
Effective tax rate		9	%		5	%		10	%		10	%

The income tax provision for the nine months ended September 26, 2020 was computed based on the Company’s annual forecast of profit by jurisdiction and forecasted effective tax rate for the year. The changes in the Company’s effective tax rate for the three and nine months ended September 26, 2020 as compared to the three and nine months ended September 30, 2019 are primarily due to (i) changes in forecasted earnings, (ii) computed research and development credits on forecasted earnings levels, (iii) the Foreign Derived Intangible Income (“FDII”) deduction on forecasted earnings levels, and (iv) a one-time provision for additional withholding tax related to a dividend distribution from the Company’s Korea subsidiary offset by a one-time benefit related to the filings of the Company’s 2019 foreign income tax returns. The Company’s recorded effective tax rate is less than the U.S. statutory rate primarily due to projected FDII deductions and federal research and development tax credits.

The Company currently has a partial valuation allowance recorded against certain foreign and state net operating loss and credit carryforwards where the realizability of such deferred tax assets is substantially in doubt. Each quarter, the Company assesses the likelihood that it will be able to recover its deferred tax assets. The Company considers available evidence, both positive and negative, including forecasted earnings in assessing its need for a valuation allowance. As a result of the Company’s analysis, it concluded that it is more likely than not that a portion of its deferred tax assets will not be realized. Therefore, the Company continues to provide a valuation allowance against certain deferred tax assets. The Company continues to monitor available evidence and may reverse some or all of the remaining valuation allowance in future periods, if

appropriate. The Company has a recorded valuation allowance against certain of its deferred tax assets of $14,150 and $14,160 as of September 26, 2020 and December 31, 2019, respectively.

On March 27, 2020, the “Coronavirus Aid, Relief and Economic Security Act” (the “CARES Act”) was enacted. The CARES Act includes provisions relating to refundable payroll tax credits, deferment of the employer portion of certain payroll taxes, net operating loss carryback periods, alternative minimum tax credit refunds, modifications to the net interest deduction limitations and technical corrections to tax depreciation methods for qualified improvement property. These changes did not have a material impact on the Company’s consolidated financial position, results of operations, and cash flows.