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Lease Obligations (Tables) | 12 Months Ended
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Dec. 31, 2018
Leases [Abstract] |
Schedule of Operating Lease Obligations and Payments Expected to be Received from Sublease Agreements | The following table provides a summary of operating lease obligations and payments expected to be received from sublease agreements as of December 31, 2018 (in thousands):
Operating lease obligations: |  | Lease Termination Date |  | Less than 1 year |  | 1-2 years |  | 3-4 years |  | Total
Corporate headquarters - San Diego, CA |  | April 2023 |  | $ | 135 |  | $ | 283 |  | $ | 198 |  | $ | 616
Office and research facility - La Jolla, CA |  | June 2019 |  | 373 |  | — |  | — |  | 373
Bioscience and Technology Business Center - Lawrence, KS |  | December 2020 |  | 57 |  | 56 |  | — |  | 113
Office - Emeryville, CA |  | August 2021 |  | 260 |  | 455 |  | — |  | 715
Research Facility - Emeryville, CA |  | August 2021 |  | 203 |  | 351 |  | — |  | $ | 554
Office - Winnersh, United Kingdom |  | April 2019 |  | 43 |  | — |  | — |  | 43
Research Facility - Cambridge, United Kingdom |  | September 2019 |  | 549 |  | — |  | — |  | 549
Total operating lease obligations |  |  |  | $ | 1,620 |  | $ | 1,145 |  | $ | 198 |  | $ | 2,963
Sublease payments expected to be received: |  |  |  |  |  |  |  |  |  |
Office and research facility - La Jolla, CA |  | June 2019 |  | 360 |  | — |  | — |  | 360
Net operating lease obligations |  |  |  | $ | 1,260 |  | $ | 1,145 |  | $ | 198 |  | $ | 2,603

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- Definition Tabular disclosure of lessor's property under leasing agreements and property available for lease (not currently under lease) by property class, the gross amount, accumulated depreciation and net amount of as of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84164653&loc=d3e41551-112718 + Details
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