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Note 3 - Revenue Recognition - Revenue by Major Product Category (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Revenue, net $ 40,673 $ 53,030
Percent of Revenue 100.00% 100.00%
Data Center [Member]    
Revenue, net $ 28,986 $ 20,353
Percent of Revenue 71.20% 38.40%
CATV [Member]    
Revenue, net $ 8,736 $ 27,779
Percent of Revenue 21.50% 52.40%
Telecom [Member]    
Revenue, net $ 2,269 $ 3,707
Percent of Revenue 5.60% 7.00%
FTTH [Member]    
Revenue, net $ 0 $ 2
Percent of Revenue 0.00% 0.00%
Product and Service, Other [Member]    
Revenue, net $ 682 $ 1,189
Percent of Revenue 1.70% 2.20%