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Note R - Segment and Geographic Information - Revenue Information by Geographic Region (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Revenue, net $ 211,565 $ 234,623 $ 190,872
UNITED STATES      
Revenue, net 14,633 18,380 9,795
TAIWAN, PROVINCE OF CHINA      
Revenue, net 99,201 131,076 97,776
CHINA      
Revenue, net $ 97,731 $ 85,167 $ 83,301