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Fair Value of Derivative Liabilities Recorded (Detail) (USD $)	Jun. 30, 2013	Jun. 30, 2012
Warrant derivative liabilities	$ 143,000	$ 4,943,000
Estimated Fair Value Of New Derivative Liabilities [Member]
Warrant derivative liabilities	931,000
Change In Estimated Fair Value Recognized In Results Of Operations [Member]
Warrant derivative liabilities	$ (5,731,000)

Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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