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Business, Acquisition of Assets and Basis of Presentation - Unaudited Pro-forma Information (Detail) - USD ($)
 12 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Business Combinations [Abstract]    
Total revenue $ 1,371,106 $ 1,736,139
Expenses    
Cost of sales-ProstaScint 1,818,690 2,054,786
Research and development 3,065,626 3,933,619
Research and development-related party (Note 8) 156,988 125,587
General and administrative 4,417,884 2,388,665
Amortization and impairment of intangible assets 131,989 100,000
Loss from operations (8,220,071) (6,866,518)
Interest (expense) income (114,994) (45,553)
Net loss, before income tax (8,335,065) (6,912,071)
Deferred income tax benefit 23,910 813,697
Net loss $ (8,311,155) $ (6,098,374)