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Bank Notes Payable (Details Textual) - USD ($)
6 Months Ended
Jun. 30, 2018
Dec. 31, 2017
Debt Instrument [Line Items]    
Cash deposits $ 1,261,547 $ 3,653,431
Notes payable $ 1,683,870 $ 1,382,418
Maximum [Member]    
Debt Instrument [Line Items]    
Percentage of cash deposit 100.00%  
Minimum [Member]    
Debt Instrument [Line Items]    
Percentage of cash deposit 30.00%