v3.19.1
Notes Payable - Schedule of Notes Payable (Parenthetical) (Detail) - Notes Payable [Member]
1 Months Ended 12 Months Ended
Aug. 15, 2018
Nov. 30, 2018
Sep. 30, 2018
Dec. 31, 2018
Dec. 31, 2017
Aug. 31, 2017
10% Promissory Note Due on Demand [Member]            
Debt Instrument [Line Items]            
Notes payable, interest rate       10.00% 10.00%  
8% Convertible Promissory Note Due March 2019 [Member]            
Debt Instrument [Line Items]            
Notes payable, interest rate       8.00% 8.00%  
Notes payable, maturity date       Mar. 31, 2019 Mar. 31, 2019  
8% Secured Promissory Notes Due July/August 2018 [Member]            
Debt Instrument [Line Items]            
Notes payable, interest rate       8.00% 8.00% 8.00%
Notes payable, maturity date, description       July/August 2018 July/August 2018  
8% Promissory Notes Due March 2019 [Member]            
Debt Instrument [Line Items]            
Notes payable, interest rate       8.00% 8.00%  
Notes payable, maturity date       Mar. 31, 2019 Mar. 31, 2019  
0% Promissory Notes Due May 2018 [Member]            
Debt Instrument [Line Items]            
Notes payable, interest rate   0.00%   0.00% 0.00%  
Notes payable, maturity date   May 31, 2018   May 31, 2018 May 31, 2018  
8% Promissory Note Due March 2019 [Member]            
Debt Instrument [Line Items]            
Notes payable, interest rate     8.00% 8.00% 8.00%  
Notes payable, maturity date     Mar. 31, 2019 Mar. 31, 2019 Mar. 31, 2019  
8% Promissory Notes Due March 2019 [Member]            
Debt Instrument [Line Items]            
Notes payable, interest rate 8.00%     8.00% 8.00%  
Notes payable, maturity date Mar. 31, 2019     Mar. 31, 2019 Mar. 31, 2019  
8% Secured Promissory Notes Due March 2019 [Member]            
Debt Instrument [Line Items]            
Notes payable, interest rate       8.00% 8.00%  
Notes payable, maturity date       Mar. 31, 2019 Mar. 31, 2019  
0% Convertible Notes Due January 2021 [Member]            
Debt Instrument [Line Items]            
Notes payable, interest rate       0.00% 0.00%  
Notes payable, maturity date       Jan. 31, 2021 Jan. 31, 2021  
4% Promissory Note Due April 2021 [Member]            
Debt Instrument [Line Items]            
Notes payable, interest rate       4.00% 4.00%  
Notes payable, maturity date       Apr. 30, 2021 Apr. 30, 2021  
0% Promissory Note Due April 2019 [Member]            
Debt Instrument [Line Items]            
Notes payable, interest rate       0.00% 0.00%  
Notes payable, maturity date       Apr. 30, 2019 Apr. 30, 2019  
8% Promissory Note Due March 2021 [Member]            
Debt Instrument [Line Items]            
Notes payable, interest rate     8.00% 8.00% 8.00%  
Notes payable, maturity date       Mar. 31, 2021 Mar. 31, 2021  
12% Convertible Notes Due October 2019 [Member]            
Debt Instrument [Line Items]            
Notes payable, interest rate       12.00% 12.00%  
Notes payable, maturity date       Oct. 31, 2019 Oct. 31, 2019  
12% Convertible Notes Due November 2019 [Member]            
Debt Instrument [Line Items]            
Notes payable, interest rate       12.00% 12.00%  
Notes payable, maturity date       Nov. 30, 2019 Nov. 30, 2019