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Nature of Operations and Business Activities (Detail Textuals) - USD ($) | 9 Months Ended | 12 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2018 | Dec. 31, 2017 | Jun. 30, 2019 | Mar. 31, 2019 | Oct. 05, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2016
Nature Of Operations And Business Activities [Line Items] |  |  |  |  |  |  |  |  |  |
Accumulated deficit | $ (37,025,334) |  | $ (33,225,107) | $ (14,030,871) |  |  |  |  |  |
Stockholders' deficit | (16,402,461) | $ (10,155,120) | (15,562,252) | (3,569,506) | $ (11,641,442) | $ (27,864,191) |  | $ (8,245,279) | $ (5,753,979) | $ (2,914,235)
Working capital deficit | (12,540,955) |  | (13,985,284) |  |  |  |  |  |  |
Cash and cash equivalents | 1,319,360 | 1,058,438 | 1,853,373 | 259,955 |  |  |  |  |  |
Proceeds from convertible multi-draw credit agreement | 3,990,699 |  | 1,946,293 |  |  |  |  |  |  |
Net cash used in operating activities | $ (4,524,712) | $ (2,928,857) | (3,943,014) | $ (3,331,285) |  |  |  |  |  |
Aggregate gross proceeds |  |  | 900,000 |  |  |  |  |  |  |
Emerald Financing |  |  |  |  |  |  |  |  |  |
Nature Of Operations And Business Activities [Line Items] |  |  |  |  |  |  |  |  |  |
Proceeds from Emerald Financing |  |  | 3,250,000 |  |  |  |  |  |  |
Aggregate gross proceeds |  |  | $ 400,000 |  |  |  |  |  |  |
Emerald Financing | Multi-Draw Credit Agreement |  |  |  |  |  |  |  |  |  |
Nature Of Operations And Business Activities [Line Items] |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  | $ 20,000,000 |  |  |
Principal amounts of borrowing capacity |  |  |  |  |  |  | $ 250,000 |  |  |

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