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Operations and Basis of Presentation - Additional Information (Detail) - USD ($)
$ in Thousands
9 Months Ended
Mar. 31, 2018
Jun. 30, 2017
Mar. 31, 2017
Jun. 30, 2016
Operations [Line Items]        
Cash and cash equivalents $ 16,346 $ 16,898 $ 12,871 $ 15,313
Estimated gross proceeds from sale of units in Second Tranche Transaction, each unit consisting of one share of common stock and a warrant to purchase one share of common stock, subject to stockholder approval 25,500      
SWK Funding LLC [Member]        
Operations [Line Items]        
Senior secured term loan, additional advance 5,000      
Minimum capital raise required for the right to draw down additional term loan advance $ 20,000