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Income Taxes
 3 Months Ended
Mar. 31, 2022
Income Tax Disclosure [Abstract]  
Income Taxes Income Taxes
The Company’s provision for income taxes were as follows (in thousands):
Three Months Ended March 31,
20222021
Provision for income taxes
$82 $249 
The Company’s provision for income taxes for interim periods is determined using an estimate of its annual effective tax rate, adjusted for discrete items, if any. The Company updates its estimate of the annual effective tax rate and makes a year-to-date adjustment to the provision quarterly. Provision for income taxes for the three months ended March 31, 2022 decreased $0.2 million, compared to the three months ended March 31, 2021. The change in provision for income taxes was primarily driven by the tax benefits associated with stock-based compensation benefit in a foreign jurisdiction.
The Company regularly performs an assessment of the likelihood of realizing benefits of its deferred tax assets. As of March 31, 2022, the Company recorded a valuation allowance against its U.S. deferred tax assets based on available evidence. However, if there are favorable changes to actual operating results or to projections of future income, the Company may determine that it is more likely than not that such deferred tax assets may be realizable.
Utilization of net operating loss carryforwards, tax credits and other attributes may be subject to future annual limitations due to the ownership change limitations provided by Section 382 of the Internal Revenue Code and similar state provisions.