XML 31 R21.htm IDEA: XBRL DOCUMENT v3.19.2
Summary of Significant Accounting Policies - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) - USD ($)
Jun. 30, 2019
Dec. 31, 2018
Reported Value Measurement [Member]    
Marketable securities $ 250,388
Derivative warrants liabilities (400,179) (676,079)
Estimate of Fair Value Measurement [Member]    
Marketable securities 250,388
Derivative warrants liabilities (400,179) (676,079)
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]    
Marketable securities 250,388
Derivative warrants liabilities
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]    
Marketable securities
Derivative warrants liabilities
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]    
Marketable securities
Derivative warrants liabilities $ (400,179) $ (676,079)