Note 3 - Revenue Recognition - Revenue by Major Product Category (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenue, net	$ 43,270	$ 41,615	$ 83,943	$ 94,645
Percent of Revenue	100.00%	100.00%	100.00%	100.00%
Data Center [Member]
Revenue, net	$ 34,352	$ 27,571	$ 63,338	$ 47,924
Percent of Revenue	79.40%	66.20%	75.50%	50.60%
CATV [Member]
Revenue, net	$ 5,818	$ 9,343	$ 14,554	$ 37,123
Percent of Revenue	13.40%	22.50%	17.30%	39.20%
Telecom [Member]
Revenue, net	$ 2,379	$ 4,231	$ 4,648	$ 7,938
Percent of Revenue	5.50%	10.20%	5.50%	8.40%
FTTH [Member]
Revenue, net	$ 0	$ 55	$ 0	$ 57
Percent of Revenue	0.00%	0.10%	0.00%	0.10%
Product and Service, Other [Member]
Revenue, net	$ 721	$ 415	$ 1,403	$ 1,603
Percent of Revenue	1.70%	1.00%	1.70%	1.70%