Unaudited Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenues:
License revenues	$ 53,528	$ 39,593
Cost of revenues	6,442	4,693
Gross profit	47,086	34,900
Operating costs and expenses:
Research and development	15,542	10,409
Sales and marketing	39,972	30,914
General and administrative	7,069	5,509
Total operating expenses	62,583	46,832
Operating loss	(15,497)	(11,932)
Financial income, net	978	469
Loss before income taxes	(14,519)	(11,463)
Income taxes	(527)	(200)
Net loss	$ (15,046)	$ (11,663)
Net loss per share of common stock, basic and diluted (in dollars per share)	$ (0.53)	$ (0.43)
Weighted average number of shares used in computing net loss per share of common stock, basic and diluted (in shares)	28,362,479	26,951,205
License [Member]
Revenues:
License revenues	$ 25,074	$ 18,092
Maintenance [Member]
Revenues:
License revenues	$ 28,454	$ 21,501