v3.19.2
Subsequent Event - Additional Information (Detail) - Private Placement [Member] - 12% Unsecured Convertible Notes [Member] - Subsequent Events [Member]
Jul. 09, 2019
USD ($)
Day
Subsequent Event [Line Items]  
Convertible notes issued amount | $ $ 350,000
Convertible notes interest rate 12.00%
Convertible notes term 12 months
Debt instrument conversion price, threshold trading days | Day 5
Maximum [Member]  
Subsequent Event [Line Items]  
Debt instrument conversion price, threshold percentage 20.00%