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SHARE OPTIONS - Details of Share Options Granted (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Additional disclosures |  |  |
Share-based compensation expense | $ 2,060 | $ 405 | $ 1,865
2008 Plan | Share options |  |  |
Options Number |  |  |
Outstanding (in shares) | 204,700 | 619,650 |
Exercisable (in shares) | 200,700 |  |
Expected to vest (in shares) | 4,000 |  |
Weighted-average exercise price per option |  |  |
Outstanding (in dollars per share) | $ 2.39 | $ 1.61 |
Exercisable (in dollars per share) | 2.42 |  |
Expected to vest (in dollars per share) | $ 0.89 |  |
Weighted-average remaining contractual life (years) |  |  |
Outstanding | 4 years 9 months 29 days |  |
Exercisable | 4 years 9 months 7 days |  |
Expected to vest | 7 years 9 months 29 days |  |
Additional disclosures |  |  |
Total intrinsic value of options exercised | $ 539 | $ 270 | $ 324
Weighted average grant date fair value of options (in dollars per share) | $ 0.00 | $ 0.50 | $ 0.70
Share-based compensation expense | $ 66 | $ 21 | $ 97
Unrecognized compensation cost | $ 9 |  |
Weighted-average period of recognition of unrecognized compensation cost | 1 year 9 months 29 days |  |

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- Definition Weighted average remaining contractual term for expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + 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 (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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