Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues:
Revenues	$ 87,152	$ 77,877	$ 87,507
Cost of revenues	10,106	7,951	6,953
Gross profit	77,046	69,926	80,554
Operating expenses:
Research and development, net	52,843	47,755	40,385
Sales and marketing	12,363	12,161	12,572
General and administrative	11,841	10,354	10,488
Amortization of intangible assets (Note 7)	1,923	901	1,236
Total operating expenses	78,970	71,171	64,681
Operating income (loss)	(1,924)	(1,245)	15,873
Financial income, net (Note 13)	3,291	3,418	3,026
Revaluation of investment in other company (Note 13)	0	(870)	0
Income before taxes on income	1,367	1,303	18,899
Taxes on income (Note 14)	1,339	729	1,871
Net income	$ 28	$ 574	$ 17,028
Basic net earnings per share (in dollars per share)	$ 0	$ 0.03	$ 0.78
Diluted net earnings per share (in dollars per share)	$ 0	$ 0.03	$ 0.75
Weighted average shares used to compute net earnings per share (in thousands):
Basic (in shares)	21,932	22,034	21,771
Diluted (in shares)	22,323	22,503	22,561
License [Member]
Revenues:
Revenues	$ 47,890	$ 40,446	$ 42,899
Royalty [Member]
Revenues:
Revenues	$ 39,262	$ 37,431	$ 44,608