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Share-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2019
Canceled/expired |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions | The following table summarizes the weighted-average valuation assumptions and weighted-average grant date fair value of options granted during the periods shown below:
|  |  | Year Ended December 31,
|  |  | 2019 |  |  | 2018
Assumptions (weighted-average) |  |  |  |  |  |
Volatility |  |  | 78% |  |  | 73%
Expected term (in years) |  |  | 4.0 |  |  | 3.2
Risk-free rate |  |  | 1.9% |  |  | 2.8%
Expected dividends |  |  | 0.0% |  |  | 0.0%
Pre-vest forfeiture rate |  |  | 8.5% |  |  | 8.5%
Grant date fair value of options granted |  | $ | 0.37 |  | $ | 0.58
Options activity and positions | The following table summarizes activity and positions with respect to options for the periods shown below (in thousands):
|  |  |  |  |  |  |  |  | Weighted-average |  |  |
|  |  |  |  |  |  |  |  | remaining |  |  | Aggregate
|  |  |  |  |  | Weighted-average |  |  | contractual |  |  | intrinsic
Options |  |  | Shares |  |  | exercise price |  |  | term (in years) |  |  | value
Outstanding as of December 31, 2017 |  |  | 5,034 |  | $ | 2.94 |  |  | 6.6 |  | $ | 53
Granted |  |  | 1,229 |  |  | 1.16 |  |  | - |  |  | -
Exercised |  |  | - |  |  | - |  |  | - |  |  | -
Forfeited or expired |  |  | (1,617) |  |  | 3.51 |  |  | - |  |  | -
Outstanding as of December 31, 2018 |  |  | 4,646 |  |  | 2.27 |  |  | 7.0 |  |  | -
Granted |  |  | 1,636 |  |  | 0.65 |  |  | - |  |  | -
Exercised |  |  | - |  |  | - |  |  | - |  |  | -
Forfeited or expired |  |  | (1,178) |  |  | 2.66 |  |  | - |  |  | -
Outstanding as of December 31, 2019 |  |  | 5,104 |  | $ | 1.66 |  |  | 7.4 |  | $ | 122
Vested and expected to vest as of December 31, 2019 |  |  | 4,807 |  | $ | 1.71 |  |  | 7.3 |  | $ | 106
Exercisable as of December 31, 2019 |  |  | 2,355 |  | $ | 2.45 |  |  | 5.6 |  | $ | 3

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- Definition Tabular disclosure of number, weighted-average exercise price or conversion ratio, aggregate intrinsic value, and weighted-average remaining contractual term for outstanding options that are fully vested and expected to vest. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. + 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 (e)(1) -URI http://asc.fasb.org/extlink&oid=116856206&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=116856206&loc=d3e5070-113901 + Details
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