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INCOME TAXES
 3 Months Ended
Mar. 31, 2022
Income Tax Disclosure [Abstract]  
INCOME TAXES INCOME TAXES
Income tax provision was $1.8 million and $0.4 million for the three months ended March 31, 2022 and 2021, respectively. The effective tax rate for the three months ended March 31, 2022 was 8.8%, compared to 2.7% for the three months ended March 31, 2021. The increase in provision for income taxes and effective tax rate is primarily due to withholding tax obligations in the United States on royalties from foreign jurisdictions.
Our tax provision for income taxes for interim periods is determined using an estimate of our annual effective tax rate, adjusted for discrete items, if any. Each quarter, we update our estimate of the annual effective tax rate and make a year-to-date adjustment to the provision.
As of March 31, 2022, we are subject to examination by various tax authorities for 2016 through 2021. During the three months ended March 31, 2022, there was no material change to our uncertain tax positions. We do not expect our unrecognized tax positions to change significantly over the next twelve months.