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Consolidated Statement of Comprehensive Loss - USD ($)
12 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2015
Consolidated Statement Of Comprehensive Loss      
Net loss $ (13,331,533) $ (51,712,936) $ (17,665,563)
Other comprehensive loss      
Unrealized gain (loss) on available-for-sale investments 1,354 (1,944) 0
Total comprehensive loss $ (13,330,179) $ (51,714,880) $ (17,665,563)