Property and Equipment, Including Capitalized Software Development Costs (Detail) (USD $) In Thousands, unless otherwise specified	Apr. 30, 2013	Apr. 30, 2012
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	$ 26,886	$ 15,791
Less: accumulated depreciation and amortization	(12,293)	(6,923)
Property and Equipment, net	14,593	8,868
Computer Equipment
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	3,772	2,508
Furniture and Fixtures
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	2,457	2,255
Office Equipment
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	1,627	985
Software
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	1,490	1,151
Capitalized internal-use software development costs
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	12,230	4,998
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	$ 5,310	$ 3,894

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

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Gross amount of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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- Definition

Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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