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SHARE-BASED COMPENSATION (Tables) | 12 Months Ended
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Dec. 31, 2018
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, 2018 | 2,491,274 |  |  | $ | 1.59 |  |  |  |  |
Granted | 152,000 |  |  | 2.97 |  |  |  |  |
Exercised | — |  |  | — |  |  |  |  |
Canceled/Forfeited | (16,666 | ) |  | 2.01 |  |  |  |  |
Expired | (50,834 | ) |  | 1.64 |  |  |  |  |
Options outstanding at December 31, 2018 | 2,575,774 |  |  | $ | 1.67 |  |  | 6.90 |  | $ | 1,198,503 |
Options exercisable at December 31, 2018 | 1,944,194 |  |  | $ | 1.45 |  |  | 6.40 |  | $ | 1,152,308 |
Schedule of option valuation assumptions | Option valuation weighted-average assumptions were as follows:
| For the year ended December 31,
| 2018 |  | 2017
Expected volatility | 43.33% |  | 43.67%
Expected dividend yield | —% |  | —%
Expected term (in years) | 5.86 |  | 5.87
Weighted average risk free rate | 2.93% |  | 2.00%

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=109197908&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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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