Business Combinations (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Oct. 31, 2012
Purchase price for PowerReviews
Cash and cash equivalents	$ 745
Restricted cash	104
Accounts receivable	497
Prepaid expenses and other current assets	156
Property and equipment	280
Current deferred tax asset	239
Intangible assets:
Domain name (Indefinite useful life)	800
Developed technology (3 year useful life)	5,400
Customer relationship (3 to 10 year useful life)	35,000
Total identified intangibles assets	41,200
Goodwill	113,152
Total assets acquired	156,373
Accounts payable	(304)
Accrued liabilities	(2,167)
Deferred revenue	(2,627)
Non-current deferred tax liability	(521)
Total liabilities assumed	(5,619)
Net assets acquired	150,754
Cash	31,059
Common stock	109,745
Fair Value of Vested Stock Options Assumed	9,950
Total consideration	$ 150,754