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STOCK BASED COMPENSATION (Tables) | 12 Months Ended
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Dec. 31, 2016
STOCK BASED COMPENSATION |
Summary of information about stock options under the Plan |
|  |  |  |  |  |  | Weighted |  |  |
|  |  |  | Weighted |  | Average |  |  |
|  |  |  | Average |  | Remaining |  |  |
|  | Number of |  | Exercise |  | Contractual |  | Intrinsic
|  | Shares |  | Price |  | Life (Years) |  | Value
|  | (in thousands, except per share and year data)
Balance at December 31, 2014 |  | 4,651 |  | $ | 3.35 |  | 4.4 |  | $ | —
Granted |  | 2,733 |  |  | 1.03 |  | — |  |  | —
Exercised |  | — |  |  | — |  | — |  |  | —
Forfeited |  | (272) |  |  | 2.82 |  | — |  |  | —
Expired |  | (158) |  |  | 2.12 |  | — |  |  | —
Balance at December 31, 2015 |  | 6,954 |  | $ | 2.49 |  | 4.1 |  | $ | 98
Granted |  | 645 |  |  | 3.99 |  | — |  |  | —
Exercised |  | (1,457) |  |  | 2.48 |  | — |  |  | 1,601
Forfeited |  | (1,422) |  |  | 3.45 |  | — |  |  | —
Expired |  | — |  |  | — |  | — |  |  | —
Balance at December 31, 2016 |  | 4,720 |  | $ | 2.41 |  | 3.4 |  | $ | 4,388
Exercisable at December 31, 2016 |  | 2,257 |  | $ | 2.74 |  | 2.9 |  | $ | 1,697
Schedule of weighted-average assumptions used for estimation of the fair value of the options granted under the Plan at the date of grant, using the Black-Scholes Option Valuation Model |
|  | 2016 |  | 2015 |  | 2014 |
Risk-free interest rate |  |  | 1.13% to 1.21% |  |  | 1.10% to 1.79% |  |  | 1.10 | %
Dividend yield |  |  | 0.24% to 0.27% |  |  | 0% to 1.15% |  |  | — | %
Volatility factor of the expected market price of common stock |  |  | 74% |  |  | 73% to 74% |  |  | 70 | %
Weighted-average expected life of option |  |  | 5.0 years |  |  | 5.0 years |  |  | 3.5 years |
Weighted-average grant date fair value |  | $ | 2.36 |  | $ | 0.49 |  | $ | 1.45 |
Summary of status and activity of non-vested stock options | The following table summarizes the status and activity of non-vested stock options for the year ended December 31, 2016:
|  |  |  | Weighted
|  |  |  | Average
|  | Number of |  | Grant Date
|  | Shares |  | Fair Value
|  | (in thousands, except per share amounts)
Non-vested, beginning of year |  | 4,182 |  | $ | 0.74
Granted |  | 645 |  | $ | 2.36
Cancelled/Forfeited |  | (826) |  | $ | 0.77
Vested |  | (1,538) |  | $ | 0.85
Non-vested, end of year |  | 2,463 |  | $ | 1.08

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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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