Net Loss per Common Share - Additional Information (Detail) - shares |
Jun. 30, 2016 |
May 31, 2016 |
Nov. 30, 2015 |
Sep. 30, 2015 |
---|---|---|---|---|
Net Income Loss Per Common Share [Line Items] | ||||
Return of loaned common stock (in shares) | 9,000,000 | |||
Shares loaned under the share lending arrangement | 9,000,000 | |||
Warrants to purchase of common stock | 159,304 | |||
A Warrants | ||||
Net Income Loss Per Common Share [Line Items] | ||||
Warrants to purchase of common stock | 36,407,765 | |||
Warrants outstanding | 36,407,765 | |||
B Warrants | ||||
Net Income Loss Per Common Share [Line Items] | ||||
Warrants to purchase of common stock | 12,135,921 | |||
Warrants outstanding | 12,135,921 |