Annual report pursuant to Section 13 and 15(d)

Income Taxes - Components of Company's Deferred Tax Assets (Detail)

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Income Taxes - Components of Company's Deferred Tax Assets (Detail) - USD ($)
Dec. 31, 2013
Dec. 31, 2012
Deferred tax assets:    
Enhanced research and development tax credits $ 713,029 $ 751,213
Share-based compensation 409,391 462,976
US federal net operating loss carryforwards 242,254 59,294
US state net operating loss carryforwards 35,929 8,754
Other 24,781 31,726
Total deferred tax assets before valuation allowance 9,521,260 9,147,488
Less valuation allowance $ (9,521,260) $ (9,147,488)
Net deferred tax assets    
Deferred tax liability:    
Indefinite-lived intangible asset $ (3,257,910) $ (3,192,909)
Total net deferred tax liability (3,257,910) (3,192,909)
G B    
Deferred tax assets:    
Net operating loss carryforwards 7,735,113 7,543,489
D E    
Deferred tax assets:    
Net operating loss carryforwards $ 360,763 $ 290,036