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INTERIM CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (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
Revenues:        
Licensing and related revenue $ 3,945 $ 4,960 $ 15,108 $ 16,963
Royalties 6,060 7,046 19,826 23,747
Total revenues 10,005 12,006 34,934 40,710
Cost of revenues 1,131 1,046 3,799 2,927
Gross profit 8,874 10,960 31,135 37,783
Operating expenses:        
Research and development, net 5,619 4,637 16,279 15,548
Sales and marketing 2,376 2,235 7,271 6,628
General and administrative 2,006 1,940 5,588 5,658
Total operating expenses 10,001 8,812 29,138 27,834
Operating income (loss) (1,127) 2,148 1,997 9,949
Financial income, net 617 731 2,053 2,653
Income (loss) before taxes on income (510) 2,879 4,050 12,602
Income taxes expense (benefit) (187) 285 493 1,672
Net income (loss) $ (323) $ 2,594 $ 3,557 $ 10,930
Basic net income (loss) per share $ (0.01) $ 0.12 $ 0.16 $ 0.48
Diluted net income (loss) per share $ (0.01) $ 0.11 $ 0.16 $ 0.46
Weighted-average shares used to compute net income (loss) per share        
Basic 22,072 22,526 22,118 22,965
Diluted 22,072 23,019 22,601 23,565