Note R - Segment and Geographic Information (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Number of Reportable Segments	1
Revenue from Contract with Customer, Excluding Assessed Tax	$ 217,646	$ 222,818	$ 211,565
Percentage of Revenue	100.00%	100.00%	100.00%
Data Center [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 141,213	$ 77,094	$ 97,461
Percentage of Revenue	64.90%	34.60%	46.10%
CATV [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 59,942	$ 118,169	$ 94,266
Percentage of Revenue	27.50%	53.00%	44.60%
Telecom [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 13,831	$ 24,727	$ 16,247
Percentage of Revenue	6.40%	11.10%	7.70%
FTTH [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 56	$ 129	$ 957
Percentage of Revenue	0.00%	0.10%	0.50%
FTTH and Other [Member]
Revenue from Contract with Customer, Excluding Assessed Tax			$ 2,700
Percentage of Revenue			1.20%