CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenues:
Licensing and related revenue	$ 22,372	$ 21,727	$ 23,836
Royalties	26,528	31,950	36,403
Total revenues	48,900	53,677	60,239
Cost of revenues	5,163	3,952	3,559
Gross profit	43,737	49,725	56,680
Operating expenses:
Research and development, net	21,216	20,243	21,543
Sales and marketing	10,092	9,231	8,937
General and administrative	7,670	7,884	7,639
Total operating expenses	38,978	37,358	38,119
Operating income	4,759	12,367	18,561
Financial income, net (Note 11)	2,714	3,380	2,909
Income before taxes on income	7,473	15,747	21,470
Income taxes (Note 12)	788	2,062	2,908
Net income	$ 6,685	$ 13,685	$ 18,562
Basic net income per share	$ 0.30	$ 0.60	$ 0.80
Diluted net income per share	$ 0.30	$ 0.59	$ 0.77
Weighted average shares used to compute net income per share
Basic	22,009	22,798	23,173
Diluted	22,465	23,357	24,153