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Income Tax Disclosure Line Items

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Amount of milestone payment received upon achievement of certain milestone.

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Amount of deferred tax liability attributable to taxable temporary differences from research and development costs.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Topic 740
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.

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Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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