Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events - Additional Information (Detail)

v3.20.1
Subsequent Events - Additional Information (Detail) - Subsequent Event [Member] - Private Placement [Member] - USD ($)
$ / shares in Units, $ in Millions
Apr. 28, 2020
Apr. 27, 2020
Subsequent Event [Line Items]    
Common stock, shares issued 5,615,653  
Common stock, price per share $ 0.33  
Warrants to purchase shares of common stock 0.75  
Description of stock units issued each unit consisting of one share of common stock and a warrant to purchase 0.75 shares of common stock  
Exercise price per unit of warrant $ 0.366 $ 0.362
Warrant exercisable date Oct. 27, 2020  
Warrant expiration date Apr. 27, 2025  
Gross proceeds from issuance of common stock $ 1.9  
Placement agent fees and offering expenses 0.3  
Proceeds from issuance of common stock $ 1.6  
Placement Agent [Member]    
Subsequent Event [Line Items]    
Exercise price per unit of warrant $ 0.3795  
Maximum number of common shares issuable per warrant upon conversion 505,409