Consolidated Statements of Income (Loss) - USD ($) shares in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue
Total Revenue	$ 563,004,000	$ 506,510,000	$ 530,061,000
Cost of Revenue
Total Cost of Revenue	344,627,000	288,959,000	310,894,000
Gross Profit	218,377,000	217,551,000	219,167,000
Selling, general and administrative expenses	124,414,000	113,972,000	130,288,000
Research and development expenses	108,663,000	113,287,000	126,200,000
Asset impairments	0	65,000	3,872,000
Gain on contingency			(1,230,000)
Operating Loss	(14,700,000)	(9,773,000)	(39,963,000)
Interest and dividend income	2,844,000	1,936,000	2,765,000
Interest expense	(34,000)	(5,000)	(511,000)
Net investment gain	1,761,000	4,850,000	11,434,000
Other income (expense), net	3,824,000	(3,254,000)	1,498,000
Loss Before Income Taxes	(6,305,000)	(6,246,000)	(24,777,000)
Income tax (expense) benefit	(2,330,000)	8,624,000	(28,205,000)
Net Income (Loss)	$ (8,635,000)	$ 2,378,000	$ (52,982,000)
Weighted average shares outstanding – basic	48,582	47,996	47,836
Weighted average shares outstanding – diluted	48,582	48,288	47,836
(Loss) earnings per common share - basic	$ (0.18)	$ 0.05	$ (1.11)
(Loss) earnings per common share - diluted	$ (0.18)	$ 0.05	$ (1.11)
Network Solutions [Member]
Revenue
Total Revenue	$ 498,834,000	$ 438,015,000	$ 455,226,000
Cost of Revenue
Total Cost of Revenue	307,841,000	244,226,000	263,677,000
Gross Profit	190,993,000	193,789,000	191,549,000
Services & Support [Member]
Revenue
Total Revenue	64,170,000	68,495,000	74,835,000
Cost of Revenue
Total Cost of Revenue	36,786,000	44,733,000	47,217,000
Gross Profit	$ 27,384,000	$ 23,762,000	$ 27,618,000