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Share-based compensation | 9 Months Ended
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Sep. 30, 2018
Share-based compensation |
Share-based compensation | Note 10 — Share-based compensation The following table shows the total share-based compensation expense included in the unaudited consolidated statements of operations (thousands):
|  | Three months ended |  | Nine months ended |
|  | September 30, |  | September 30, |
|  | 2018 |  | 2017 |  | 2018 |  | 2017 |
Research and development |  | $ | 2,053 |  | $ | 871 |  | $ | 6,338 |  | $ | 2,229 |
General and administrative |  | 1,989 |  | 1,201 |  | 6,115 |  | 2,528 |
|  | $ | 4,042 |  | $ | 2,072 |  | $ | 12,453 |  | $ | 4,757 |
There were 757,273 and 8,756,211 options over ordinary shares granted in the three months ended September 30, 2018 and 12,187,614 and 28,959,363 options over ordinary shares granted in the nine months ended September 30, 2018 and 2017, respectively, with a weighted average fair value of $1.09, $0.34, $0.82 and $0.34, respectively. Additionally, in the three and nine months ended September 30, 2018, 1,259,760 and 7,966,716 options were granted, which have a nominal exercise price (similar to a restricted stock unit (RSU)), with a weighted average fair value of $1.67 and $1.40, respectively. The RSU-style options over ordinary shares in Adaptimmune Therapeutics plc were granted under the Adaptimmune Therapeutics plc Employee Share Option Scheme (adopted on January 14, 2016). These options have an exercise price equal to the nominal value of an ordinary share, of £0.001, and generally vest over four years, with 25% on the first, and each subsequent, anniversary of the grant date. The RSU-style options are not subject to performance conditions and the contractual term is ten years.

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- Definition The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI http://asc.fasb.org/topic&trid=2228938 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -URI http://asc.fasb.org/subtopic&trid=2208855 + Details
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