Quarterly report pursuant to Section 13 or 15(d)

Warrants - Additional Information (Detail)

v3.7.0.1
Warrants - Additional Information (Detail) - Series A Preferred Stock [Member] - $ / shares
Jul. 25, 2017
May 10, 2017
Preferred Stock Issued Upon Initial Closing [Member]    
Class of Warrant or Right [Line Items]    
Warrants to purchase common stock, issued   4,621,037
Term of warrants   7 years
Warrants exercise price per share   $ 0.31
Preferred Stock Issued Upon Second Closing [Member] | Subsequent Event [Member]    
Class of Warrant or Right [Line Items]    
Warrants to purchase common stock, issued 6,024,124  
Term of warrants 7 years  
Warrants exercise price per share $ 0.31