Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity (Deficit) - Summary of Warrants Outstanding (Detail)

v3.20.1
Stockholders' Equity (Deficit) - Summary of Warrants Outstanding (Detail) - $ / shares
1 Months Ended 12 Months Ended
Apr. 30, 2018
Dec. 31, 2019
Dec. 31, 2018
Class Of Warrant Or Right [Line Items]      
Number of Shares of Common Stock   1,297,151 1,297,151
May 2017 Warrant [Member]      
Class Of Warrant Or Right [Line Items]      
Issuance Date   May 2017 May 2017
Life in Years   5 years 5 years
Exercise Price   $ 13.6088 $ 13.6088
Number of Shares of Common Stock   809,400 809,400
Various Dates in 2017 Warrant [Member]      
Class Of Warrant Or Right [Line Items]      
Issuance Date   Various dates in 2017 Various dates in 2017
Life in Years   10 years 10 years
Exercise Price   $ 13.6088 $ 13.6088
Number of Shares of Common Stock   313,440 313,440
Various Dates in 2016 Warrant [Member]      
Class Of Warrant Or Right [Line Items]      
Issuance Date   Various dates in 2016 Various dates in 2016
Life in Years   4 years 4 years
Exercise Price   $ 13.6088 $ 13.6088
Number of Shares of Common Stock   154,311 154,311
April 2018 Warrant [Member]      
Class Of Warrant Or Right [Line Items]      
Issuance Date   April 2018 April 2018
Life in Years 5 years 5 years 5 years
Exercise Price $ 11.73 $ 11.7300 $ 11.7300
Number of Shares of Common Stock   20,000 20,000