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Note 3 - Revenue Recognition - Revenue by Major Product Category (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Revenue, net $ 52,299 $ 54,189 $ 104,540 $ 103,890
Percent of Revenue 100.00% 100.00% 100.00% 100.00%
CATV [Member]        
Revenue, net $ 23,713 $ 27,599 $ 48,694 $ 46,238
Percent of Revenue 45.40% 51.00% 46.70% 44.50%
Data Center [Member]        
Revenue, net $ 21,497 $ 22,392 $ 42,911 $ 48,331
Percent of Revenue 41.10% 41.30% 41.00% 46.50%
Telecom [Member]        
Revenue, net $ 6,276 $ 3,333 $ 11,541 $ 7,811
Percent of Revenue 12.00% 6.20% 11.00% 7.50%
FTTH [Member]        
Revenue, net $ 27 $ 298 $ 124 $ 722
Percent of Revenue 0.00% 0.50% 0.10% 0.70%
Product and Service, Other [Member]        
Revenue, net $ 786 $ 567 $ 1,270 $ 788
Percent of Revenue 1.50% 1.00% 1.20% 0.80%