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Note 13 - Segment and Geographic Area Information - Revenue and Property and Equipment, Net by Geographic Area (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Revenues $ 411,172 $ 362,963 $ 321,607
Property and equipment, net and Operating leases - right of use asset 98,870 109,688  
UNITED STATES      
Revenues 250,761 230,444 206,555
Property and equipment, net and Operating leases - right of use asset 66,440 69,256  
Non-US [Member]      
Revenues 160,411 132,519 $ 115,052
INDIA      
Property and equipment, net and Operating leases - right of use asset 20,401 24,774  
Other Geographic Areas [Member]      
Property and equipment, net and Operating leases - right of use asset $ 12,029 $ 15,658