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Basis of presentation, summary of significant accounting policies and recent accounting pronouncements (Tables) | 6 Months Ended
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Jun. 30, 2019
Accounting Policies [Abstract] |
Schedule of Antidilutive Securities | Securities that could potentially dilute loss per share in the future were not included in the computation of diluted loss per share at June 30, 2019 and 2018 because their inclusion would be anti-dilutive are as follows:
|  | June 30,
|  | 2019 |  | 2018
Warrants to purchase common stock |  |  | 3,574,257 |  |  |  | 1,671,113 |
Options to purchase common stock |  |  | 12,000 |  |  |  | 150,000 |
Escrow shares |  |  | 200,000 |  |  |  | 200,000 |
Unvested restricted stock awards |  |  | 42,980 |  |  |  | 571,567 |
Convertible Series B preferred shares |  |  | 4,999 |  |  |  | 703,000 |
Total |  |  | 3,834,236 |  |  |  | 3,295,680

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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