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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 Assumptions Used | The following assumptions were used in the Binomial option pricing model:
|  | Year Ended December 31, 2015 |
Options granted |  | Average risk-free rate of return |  | Exercise multiple |  | Volatility rate |  | Dividend yield |  | Post- vesting forfeiture rate |
January 12, 2015 |  | 2.82% |  | 1.8-3 times |  | 93.0% |  | 0% |  | 5%-8% |
July 6, 2015 |  | 3.20% |  | 3 times |  | 91.0% |  | 0% |  | 5% |
September 9, 2015 |  | 2.94%-3.08% |  | 1.8-3 times |  | 91.0%-92.0% |  | 0% |  | 5%-8% |
Summary of Stock Option Activity | A summary of the aggregate option activity and information regarding options outstanding as of December 31, 2018 is as follows:
|  | Number of Options |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contract Life |  |  | Aggregate Intrinsic Value |
Options outstanding on January 1, 2018 |  |  | 9,634,542 |  |  |  | 0.50 |  |  |  |  |  |  |  |  |
Granted |  |  | - |  |  |  | - |  |  |  |  |  |  |  |  |
Forfeited |  |  | (161,724 | ) |  |  | 0.59 |  |  |  |  |  |  |  |  |
Expired |  |  | (2,526 | ) |  |  | 0.59 |  |  |  |  |  |  |  |  |
Exercised |  |  | (230,225 | ) |  |  | 0.59 |  |  |  |  |  |  |  |  |
Options outstanding on December 31, 2018 |  |  | 9,240,067 |  |  |  | 0.49 |  |  |  | 4.53 |  |  |  | 4,049,496 |
Options vested or expected to vest on December 31, 2018 |  |  | 20,043,353 |  |  |  | 0.47 |  |  |  | 4.11 |  |  |  | 9,351,312 |
Options exercisable on December 31, 2018 |  |  | 9,075,709 |  |  |  | 0.49 |  |  |  | 4.49 |  |  |  | 3,993,944 |
Schedule of Nonvested Restricted Stock Units Activity | A summary of the non-vested RSU activity in 2018 is as follows:
|  | Number of RSUs |  |  | Weighted Average Grant Date Fair Value |
Nonvested RSUs on January 1, 2018 |  |  | 10,240,743 |  |  | $ | 0.98 |
Granted |  |  | 44,365,641 |  |  |  | 1.48 |
Vested |  |  | (9,272,063 | ) |  |  | 1.43 |
Forfeited |  |  | (1,846,708 | ) |  |  | 1.07 |
Nonvested RSUs on December 31, 2018 |  |  | 43,487,613 |  |  | $ | 1.39 |

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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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