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Revenue Recognition (Tables)
 3 Months Ended
Apr. 30, 2022
Revenue from Contract with Customer [Abstract]  
Disaggregation of Revenue by Geographical Region
The following table summarizes revenue by geographical region (dollars in thousands): 
Three Months Ended April 30,
20222021
AmountPercentage of
Revenue		AmountPercentage of
Revenue
Americas (1)
$114,151 47 %$84,626 45 %
Europe, Middle East, and Africa69,603 28 %50,084 27 %
Asia-Pacific (2)
61,312 25 %51,507 28 %
Total revenue$245,066 100 %$186,217 100 %
(1)Revenue from the United States represented 42% and 40% of our total revenues for the three months ended April 30, 2022 and 2021, respectively.
(2)Revenue from Japan represented 14% and 15% of our total revenues for the three months ended April 30, 2022 and 2021, respectively.