CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Apr. 30, 2013		Apr. 30, 2012		Apr. 30, 2011
Revenue	$ 160,296		$ 106,136		$ 64,482
Cost of revenue	55,107	[1]	36,441	[1]	25,615	[1]
Gross profit	105,189		69,695		38,867
Operating expenses:
Sales and marketing	76,885	[1]	49,726	[1]	34,568	[1]
Research and development	33,046	[1]	20,789	[1]	10,847	[1]
General and administrative	43,207	[1]	21,895	[1]	13,156	[1]
Acquisition-related and other	12,212
Amortization of acquired intangible assets	3,924
Total operating expenses	169,274		92,410		58,571
Operating loss	(64,085)		(22,715)		(19,704)
Other income (expense), net:
Interest income	217		17		19
Other income (expense)	(1,031)		(820)		189
Total other income (expense), net	(814)		(803)		208
Loss before income taxes	(64,899)		(23,518)		(19,496)
Income tax expense (benefit)	(1,147)		811		561
Net loss	(63,752)		(24,329)		(20,057)
Accretion of redeemable convertible preferred stock			(38)		(46)
Net loss applicable to common stockholders	$ (63,752)		$ (24,367)		$ (20,103)
Net loss per share applicable to common stockholders:
Basic and diluted	$ (0.92)		$ (0.92)		$ (1.13)
Basic and diluted weighted average number of shares outstanding	69,336		26,403		17,790

[1] Includes stock-based expense as follows: Cost of revenue $ 1,704 $ 1,220 $ 978 Sales and marketing 4,250 1,869 1,122 Research and development 3,126 1,326 731 General and administrative 13,373 3,295 1,850