Business Combinations (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jul. 31, 2012
Purchase price for PowerReviews
Cash and cash equivalents	$ 744
Restricted Cash	104
Accounts receivable	471
Prepaid expenses and other current assets	188
Property and equipment	281
Current deferred tax asset	239
Other non-current assets	23
Intangible assets:
Domain name (Indefenit useful life)	800
Developed technology (3year useful life)	5,400
Customer relationship (3 to 10 year useful life)	35,000
Total identified intangibles	41,200
Goodwill	112,700
Total assets acquired	155,951
Accounts payable	(308)
Accounts liability	(1,787)
Deferred revenue	(2,581)
Non-current deferred tax liability	(521)
Total liabilities assumed	(5,197)
Net assets acquired	150,754
Cash	31,058
Common stock	109,745
Fair value of vested stock options assumed	9,951
Total consideration	$ 150,754