Note C - Revenue Recognition - Revenue by Major Product Category (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenue, net	$ 217,646	$ 222,818	$ 211,565
Percent of Revenue	100.00%	100.00%	100.00%
CATV [Member]
Revenue, net	$ 59,942	$ 118,169	$ 94,266
Percent of Revenue	27.50%	53.00%	44.60%
Data Center [Member]
Revenue, net	$ 141,213	$ 77,094	$ 97,461
Percent of Revenue	64.90%	34.60%	46.10%
Telecom [Member]
Revenue, net	$ 13,831	$ 24,727	$ 16,247
Percent of Revenue	6.40%	11.10%	7.70%
FTTH [Member]
Revenue, net	$ 56	$ 129	$ 957
Percent of Revenue	0.00%	0.10%	0.50%
Product and Service, Other [Member]
Revenue, net	$ 2,604	$ 2,699	$ 2,634
Percent of Revenue	1.20%	1.20%	1.20%