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Revenue from Contracts with Customers (Tables)
 3 Months Ended
Apr. 02, 2022
Revenue from Contract with Customer [Abstract]  
Revenue from external customers by geographic areas
The following is a summary of revenue disaggregated by geographic region based upon the location of the customers (in thousands):
Three Months Ended
April 2, 2022April 3, 2021
United States$165,631 $139,347 
Americas ex U.S.8,871 11,403 
Europe6,573 3,414 
Middle East & Africa3,617 7,089 
Asia Pacific256 821 
$184,948 $162,074 
Deferred revenue, by arrangement, disclosure
Deferred revenue consisted of the following (in thousands):
April 2,
2022		December 31,
2021
Current:
Products and services$27,293 $22,586 
Extended warranty4,968 4,892 
32,261 27,478 
Long-term:
Products and services2,568 3,137 
Extended warranty18,621 18,879 
21,189 22,016 
$53,450 $49,494