Quarterly report pursuant to Section 13 or 15(d)

Common Stock - Authorized - Additional Information (Detail)

v3.19.3
Common Stock - Authorized - Additional Information (Detail)
May 23, 2018
$ / shares
shares
Sep. 30, 2019
$ / shares
shares
Dec. 31, 2018
$ / shares
shares
May 22, 2018
shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]        
Common stock, shares authorized | shares 150,000,000 150,000,000 150,000,000 75,000,000
Common stock, par value | $ / shares $ 0.001 $ 0.001 $ 0.001  
Preferred stock, shares authorized | shares   5,000,000 5,000,000  
Preferred stock, par value | $ / shares   $ 0.001 $ 0.001  
Reverse stock split ratio 0.1