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STOCK BASED COMPENSATION (Tables) | 12 Months Ended
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Dec. 31, 2018
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, 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 |
Granted |  | 338 |  |  | 2.99 |  | — |  |  | — |
Exercised |  | (94) |  |  | 1.30 |  | — |  |  | 87 |
Forfeited |  | (37) |  |  | 4.28 |  | — |  |  | — |
Expired |  | (21) |  |  | 5.00 |  | — |  |  | — |
Balance at December 31, 2017 |  | 4,906 |  | $ | 2.45 |  | 2.6 |  | $ | 2,564 |
Granted |  | 375 |  |  | 1.90 |  | — |  |  | — |
Exercised |  | (171) |  |  | 1.02 |  | — |  |  | 195 |
Forfeited |  | (405) |  |  | 3.99 |  | — |  |  | — |
Expired |  | (462) |  |  | 2.27 |  | — |  |  | — |
Balance at December 31, 2018 |  | 4,243 |  | $ | 2.33 |  | 2.0 |  | $ | 1,475 |
Exercisable at December 31, 2018 |  | 3,552 |  | $ | 2.28 |  | 1.6 |  | $ | 1,475 |
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 |
|  |  | 2018 |  |  | 2017 |  |  | 2016
Risk-free interest rate |  |  | 2.67% to 2.89% |  |  | 1.46% to 1.60% |  |  | 1.13% to 1.21%
Dividend yield |  |  | 0.36% to 0.53% |  |  | 0.31% to 0.36% |  |  | 0.24% to 0.27%
Volatility factor of the expected market price of common stock |  |  | 63% to 64% |  |  | 72% to 74% |  |  | 74%
Weighted-average expected life of option |  |  | 3.5 years |  |  | 3.5 years |  |  | 5.0 years
Weighted-average grant date fair value |  | $ | 1.90 |  | $ | 2.99 |  | $ | 2.36
Summary of status and activity of non-vested stock options |
|  |  |  | Weighted
|  |  |  | Average
|  | Number of |  | Grant Date
|  | Shares |  | Fair Value
|  | (in thousands, except per share amounts)
Non-vested, beginning of year |  | 1,479 |  | $ | 1.24
Granted |  | 375 |  | $ | 0.88
Cancelled/Forfeited |  | (248) |  | $ | 2.25
Vested |  | (915) |  | $ | 0.80
Non-vested, end of year |  | 691 |  | $ | 1.28

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