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SHARE-BASED COMPENSATION (Tables) | 12 Months Ended
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Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of unvested common stock options | The following table summarizes information related to our common stock options:
| Number of Stock Options |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Term (in years) |  | Aggregate Intrinsic Value
Options outstanding at January 1, 2017 | 2,057,950 |  |  | $ | 1.42 |  |  |  |  |
Granted | 479,990 |  |  | 2.32 |  |  |  |  |
Exercised | (46,666 | ) |  | 1.56 |  |  |  |  |
Canceled/Forfeited | — |  |  | — |  |  |  |  |
Options outstanding at December 31, 2017 | 2,491,274 |  |  | $ | 1.59 |  |  | 7.76 |  | $ | 5,736,488 |
Options exercisable at December 31, 2017 | 1,327,068 |  |  | $ | 1.37 |  |  | 7.24 |  | $ | 3,340,061 |
Schedule of option valuation assumptions | Option valuation weighted-average assumptions were as follows:
| For the year ended December 31,
| 2017 |  | 2016
Expected volatility | 43.67% |  | 43.87%
Expected dividend yield | —% |  | —%
Expected term (in years) | 5.87 |  | 5.70
Weighted average risk free rate | 2.00% |  | 1.41%

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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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