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Condensed Consolidated Statements of Income (Loss) (Unaudited) - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Sales        
Total Sales $ 133,143 $ 114,092 $ 376,381 $ 414,274
Cost of Sales        
Total Cost of Sales 74,181 67,761 212,347 242,316
Gross Profit 58,962 46,331 164,034 171,958
Selling, general and administrative expenses 27,205 30,912 84,624 99,663
Research and development expenses 27,223 31,835 85,794 95,546
Asset impairments   3,872 65 3,872
Gain on contingency       (1,230)
Operating Income (Loss) 4,534 (20,288) (6,449) (25,893)
Interest and dividend income 344 610 1,031 1,893
Interest expense   (128) (1) (382)
Net investment gain (loss) 2,844 (216) 1,819 8,195
Other income (expense), net (1,679) 1,616 (2,307) 2,266
Income (Loss) Before Income Taxes 6,043 (18,406) (5,907) (13,921)
Income tax (expense) benefit (562) (27,717) 2,171 (27,437)
Net Income (Loss) $ 5,481 $ (46,123) $ (3,736) $ (41,358)
Weighted average shares outstanding – basic 47,957 47,824 47,957 47,803
Weighted average shares outstanding – diluted 48,424 47,824 47,957 47,803
Earnings (loss) per common share – basic $ 0.11 $ (0.96) $ (0.08) $ (0.87)
Earnings (loss) per common share – diluted $ 0.11 $ (0.96) $ (0.08) $ (0.87)
Network Solutions [Member]        
Sales        
Total Sales $ 115,229 $ 94,018 $ 323,924 $ 359,007
Cost of Sales        
Total Cost of Sales 62,795 56,444 178,492 207,353
Gross Profit 52,434 37,574 145,432 151,654
Services & Support [Member]        
Sales        
Total Sales 17,914 20,074 52,457 55,267
Cost of Sales        
Total Cost of Sales 11,386 11,317 33,855 34,963
Gross Profit $ 6,528 $ 8,757 $ 18,602 $ 20,304