Quarterly report pursuant to Section 13 or 15(d)

Stock Warrants - Schedule of Warrants Outstanding (Parenthetical) (Detail)

v3.7.0.1
Stock Warrants - Schedule of Warrants Outstanding (Parenthetical) (Detail) - Class A Warrants [Member] - shares
6 Months Ended
Jan. 31, 2017
Jun. 30, 2017
Class of Warrant or Right [Line Items]    
Warrants expiration date   Feb. 01, 2017
Warrants exercised 0