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Contractual Obligations and Commitments (Parenthetical) (Detail) (Maximum, USD $) In Millions, unless otherwise specified	1 Months Ended
	Jun. 30, 2012
Payment up on completion of the Phase III clinical trial
Commitments and Contingencies Disclosure [Line Items]
Expected payment for license Agreement	$ 0.5
Payment upon the first commercial sale of STS
Commitments and Contingencies Disclosure [Line Items]
Expected payment for license Agreement	$ 0.3

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Expected Future Contract Payments

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No definition available.

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