Stockholders' Equity - Summary of Reconciliation of Warrants to Purchase Share of the Company's Common Stock (Detail) - $ / shares	9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Common Stock Warrants [Abstract]
Number of Warrants, Outstanding and exercisable, Beginning balance	623,605	623,605
Number of Warrants, Issued	409,091	0
Number of Warrants, Expired	(623,605)	0
Number of Warrants, Outstanding and exercisable, Ending balance	409,091	623,605
Weighted Average Exercise Price, Outstanding and exercisable, Beginning balance	$ 2.50	$ 2.50
Weighted Average Exercise Price, Issued	1.10	0.00
Weighted Average Exercise Price, Expired	2.50	0.00
Weighted Average Exercise Price, Outstanding and exercisable, Ending balance	$ 1.10	$ 2.50