Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Jul. 31, 2013	Jul. 31, 2012
Revenue	$ 44,571	$ 35,662
Cost of revenue	14,299	12,908
Gross profit	30,272	22,754
Operating expenses:
Sales and marketing	21,017	15,361
Research and development	9,116	7,699
General and administrative	8,929	15,677
Acquisition-related and other	7,504	1,384
Amortization of acquired intangible assets	1,304	480
Total operating expenses	47,870	40,601
Operating loss	(17,598)	(17,847)
Other income (expense), net:
Interest income	66	49
Other expense	(59)	(453)
Total other income (expense), net	7	(404)
Loss before income taxes	(17,591)	(18,251)
Income tax expense (benefit)	(223)	288
Net loss	$ (17,368)	$ (18,539)
Net loss per share:
Basic and diluted	$ (0.23)	$ (0.30)
Basic and diluted weighted average number of shares outstanding	73,983	62,451