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Summary of Significant Accounting Policies (Details 1) (USD $) In Thousands, unless otherwise specified	Apr. 30, 2013	Apr. 30, 2012
Furniture and fixtures	$ 59	$ 58
Computer equipment and software	549	287
Laboratory equipment	179	167
Leasehold improvements	2	2
Software in-progress	0	216
Total property and equipment	789	730
Less: Accumulated depreciation	(375)	(170)
Property and equipment, net	$ 414	$ 560

X

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated amortization of capitalized costs for computer software, including but not limited to, acquired and internally developed computer software.

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Amount before accumulated depreciation of equipment commonly used in offices and stores that have no permanent connection to the structure of a building or utilities. Examples include, but are not limited to, desks, chairs, tables, and bookcases.

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