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CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Conversion of Stock [Line Items] |  |  |
Non-cash charge recorded to finance expense as result of warrant exchange |  |  | $ 1,284,354
Warrants issued as consideration for placement agent services | $ 353,721 | $ 308,239 |
Amount of direct issuance expense allocated to Series C-1 and Series C-2 Warrants and recorded as a reduction of additional paid in capital | 108,197 | 102,088 |
Amount of direct issuance expense allocated to Series C Preferred Stock and recorded as a reduction of temporary equity | 218,383 | 206,151 |
Amount classified out of stockholders deficit and presented as Warrants with Down-Round Protection within long-term liabilities |  | $ 341,662 |
Amount of direct issuance expense allocated to Series D-1, D-2 and Series C-3 Warrants and recorded as a reduction of additional paid in capital | 12,405 |  |
Amount of direct issuance expense allocated to Series D common stock recorded as a reduction of additional paid in capital | 14,736 |  |
Series B-1 Warrant [Member] |  |  |
Conversion of Stock [Line Items] |  |  |
Number of warrants exchanged |  |  | 1,200,710
Increase (decrease) in equity due to exchange of warrants |  |  | $ 1,833,876
Series B-2 Warrant [Member] |  |  |
Conversion of Stock [Line Items] |  |  |
Number of warrants exchanged |  |  | 1,200,710
Increase (decrease) in equity due to exchange of warrants |  |  | $ 1,612,186
Warrant [Member] |  |  |
Conversion of Stock [Line Items] |  |  |
Number of warrants exchanged |  | 1,440,880 |
Increase (decrease) in equity due to exchange of warrants |  | $ (1,587,556) |
Series B Preferred Stock [Member] |  |  |
Conversion of Stock [Line Items] |  |  |
Number of Series A Preferred Stock shares exchanged for Series B Preferred Stock shares |  |  | 6,931
Increase (decrease) in equity due to exchange of warrants |  |  | $ 3,502,536
Stock dividend | 854,647 | 647,215 | $ 390,219
Series B Preferred Stock [Member] | Conversion of Preferred Stock Into Common Stock [Member] |  |  |
Conversion of Stock [Line Items] |  |  |
Number of preferred shares converted |  |  | 400
Stock issued upon conversion |  |  | 68,966
Amount of stock converted |  |  | $ 178,720
Series C Preferred Stock [Member] |  |  |
Conversion of Stock [Line Items] |  |  |
Stock dividend | 566,033 | 152,480 |
Series B and C Preferred Stock [Member] |  |  |
Conversion of Stock [Line Items] |  |  |
Stock dividend | $ 1,420,680 | $ 799,695 |
Interest rate | 9.00% | 9.00% |
Series A Preferred Stock [Member] |  |  |
Conversion of Stock [Line Items] |  |  |
Number of Series A Preferred Stock shares exchanged for Series B Preferred Stock shares |  |  | 6,931
Increase (decrease) in equity due to exchange of warrants |  |  | $ (4,076,688)
Cash dividend | $ 9,400 | $ 4,700 | $ 0
Series A Preferred Stock [Member] | Conversion of Preferred Stock Into Common Stock [Member] |  |  |
Conversion of Stock [Line Items] |  |  |
Number of preferred shares converted |  |  | 100
Stock issued upon conversion |  |  | 17,242
Amount of stock converted |  |  | $ 58,817

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