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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (unaudited) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Revenue:        
Software licenses $ 2,334 $ 3,387 $ 7,704 $ 8,070
Software maintenance 1,023 661 3,187 2,471
Services 943 724 2,179 2,100
Hardware sales     1,129  
Royalties 170 484 737 1,599
Total revenue 4,470 5,256 14,936 14,240
Costs and expenses:        
Cost of hardware sales     813  
Cost of services 494 421 1,075 1,138
Research and development 1,452 1,466 4,504 4,431
Selling and marketing 931 1,069 2,998 3,143
General and administrative 922 854 2,580 2,915
Exit costs 2,832   2,832  
Total costs and expenses; 6,631 3,810 14,802 11,627
Operating income (loss) before patent related income (2,161) 1,446 134 2,613
Gain on sale of patent assets   15,167   86,394
Income from patent arrangement      780   
Operating income (loss) after patent related income (2,161) 16,613 914 89,007
Other income 27   27 85
Interest income 80 45 239 137
Income (loss) from continuing operations before income taxes (2,054) 16,658 1,180 89,229
Provision for (benefit from) income taxes (901) 6,578 169 23,248
Income (loss) from continuing operations (1,153) 10,080 1,011 65,981
Income from discontinued operations, net of income taxes   217   360
Net income (loss) (1,153) 10,297 1,011 66,341
Basic net income (loss) per share:        
Basic net income (loss) per share from continuing operations (in dollars per share) $ (0.05) $ 0.45 $ 0.04 $ 3.05
Basic net income per share from discontinued operations (in dollars per share) $ 0.00 $ 0.01 $ 0.00 $ 0.02
Basic net income (loss) per share (in dollars per share) $ (0.05) $ 0.46 $ 0.04 $ 3.07
Diluted net income (loss) per share:        
Diluted net income (loss) per share from continuing operations (in dollars per share) $ (0.05) $ 0.45 $ 0.04 $ 3.01
Diluted net income per share from discontinued operations (in dollars per share) $ 0.00 $ 0.01 $ 0.00 $ 0.02
Diluted net income (loss) per share (in dollars per share) $ (0.05) $ 0.46 $ 0.04 $ 3.03
Weighted-average shares - basic (in shares) 22,571 22,339 22,533 21,609
Weighted-average shares - diluted (in shares) 22,571 22,501 22,623 21,888
Comprehensive income (loss):        
Net income (loss) (1,153) 10,297 1,011 66,341
Other comprehensive income:        
Unrealized gains (losses) on available for sale securities (26) (4) (6) 16
Comprehensive income (loss) $ (1,179) $ 10,293 $ 1,005 $ 66,357