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Accrued expenses (Details) - USD ($)
Sep. 30, 2019
Dec. 31, 2018
Disclosure Accrued Expenses Details Abstract    
Accrued officer salaries $ 4,621,400 $ 4,473,415
Accrued interest 191,038 164,313
Other 905,800 459,053
Accrued expenses $ 5,718,238 $ 5,096,781