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Income Tax - Reconciliation of Statutory Tax Rate to Effective Income Tax Rate (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Income Tax Disclosure [Abstract]    
Pretax income (loss) $ (6,715,420) $ (10,328,806)
Federal tax rate 21.00% 34.00%
Income tax expenses (benefit) computed at the ordinary tax rate $ (1,410,238) $ (3,511,794)
Non-deductible expenses 17,392 41,829
Stock-based compensation 148,102 908,041
Warrants with down round protection (102,110)
Tax in respect of differences in corporate tax rates (98,222) 524,134
Losses and timing differences in respect of which no deferred taxes assets were recognized $ 1,342,966 $ 2,139,900