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Note R - Segment and Geographic Information (Details Textual) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Number of Reportable Segments 1    
Revenue from Contract with Customer, Excluding Assessed Tax $ 249,365 $ 217,646 $ 222,818
Percentage of Revenue 100.00% 100.00% 100.00%
Data Center [Member]      
Revenue from Contract with Customer, Excluding Assessed Tax $ 148,525 $ 141,213 $ 77,094
Percentage of Revenue 59.50% 64.90% 34.60%
CATV [Member]      
Revenue from Contract with Customer, Excluding Assessed Tax $ 87,713 $ 59,942 $ 118,169
Percentage of Revenue 35.20% 27.50% 53.00%
Telecom [Member]      
Revenue from Contract with Customer, Excluding Assessed Tax $ 10,980 $ 13,831 $ 24,727
Percentage of Revenue 4.40% 6.40% 11.10%
FTTH and Other [Member]      
Revenue from Contract with Customer, Excluding Assessed Tax $ 2,100    
Percentage of Revenue 0.90%    
FTTH [Member]      
Revenue from Contract with Customer, Excluding Assessed Tax $ 3 $ 56 $ 129
Percentage of Revenue 0.00% 0.00% 0.10%