Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events - Additional Information (Detail)

v3.10.0.1
Subsequent Events - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
Oct. 03, 2018
Jun. 19, 2018
Subsequent Event [Line Items]    
Exercise price per unit of warrant   $ 4.00
Warrant exercisable period   5 years
Subsequent Event [Member] | Direct Offering [Member]    
Subsequent Event [Line Items]    
Gross proceeds from issuance of common stock $ 5.6  
Placement agent fees and offering expenses 0.6  
Net proceeds from issuance of common stock $ 5.0  
Subsequent Event [Member] | Private Placement [Member]    
Subsequent Event [Line Items]    
Maximum number of common shares issuable per warrant upon conversion 0.5  
Exercise price per unit of warrant $ 3.1445  
Warrant exercisable period 5 years  
Subsequent Event [Member] | Common Stock | Direct Offering [Member]    
Subsequent Event [Line Items]    
Common stock, shares issued 1,789,258  
Shares issued to related party, par value $ 3.1445