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Note 3 - Revenue Recognition - Revenue by Major Product Category (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Revenue, net $ 53,030 $ 52,242
Percent of Revenue 100.00% 100.00%
CATV [Member]    
Revenue, net $ 27,779 $ 24,980
Percent of Revenue 52.40% 47.80%
Data Center [Member]    
Revenue, net $ 20,353 $ 21,415
Percent of Revenue 38.40% 41.00%
Telecom [Member]    
Revenue, net $ 3,707 $ 5,265
Percent of Revenue 7.00% 10.10%
FTTH [Member]    
Revenue, net $ 2 $ 98
Percent of Revenue 0.00% 0.20%
Product and Service, Other [Member]    
Revenue, net $ 1,189 $ 484
Percent of Revenue 2.20% 0.90%