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Commitments and Contingencies | 12 Months Ended
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Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract] |
Commitments and Contingencies | Commitments and Contingencies Operating Leases The Company leases manufacturing, office and laboratory space in Rockville, Maryland under five leases that have terms that expire between 2019 and 2027 unless renewed. During the year ended December 31, 2017, the Company entered into an agreement to sublease a portion of the space it leases. Under the terms of the sublease, the Company will receive a total of $2.4 million over the 30 month term. The Rockville leases include a lease executed in July 2015 for space that the Company uses as its headquarters with office and laboratory space and manufacturing space currently under construction. Under the terms of the lease, which commenced on January 1, 2016, the Company received an assignment fee from the former tenant and a tenant improvement allowance from the landlord totaling $5.1 million. In July 2017, the Company executed a lease amendment for its headquarters building which extends the term of the lease to August 2027, restructures the rent due under the lease, and provides for an additional tenant improvement allowance from the landlord of $7.5 million, which was received during the third quarter. The assignment fee and tenant improvement allowances have been recorded as deferred rent and are being recognized over the new lease term. The Company also leases office and laboratory space in South San Francisco under a lease that expires on February 28, 2018. During the year ended December 31, 2016, the Company entered into a sublease agreement for a portion of the South San Francisco space (see Note 8). As of December 31, 2017, future payments to be received by the Company under this sublease total approximately $0.1 million. In April 2017, the Company entered into a 72-month lease commencing in December 2017 for office and laboratory space which will replace our current South San Francisco location. All of the leases contain rent escalation clauses and certain leases contain rent abatements. For financial reporting purposes, rent expense is charged to operations on a straight-line basis over the term of the lease. As of December 31, 2017 and 2016, the Company had recorded a deferred rent liability of $12.3 million and $6.2 million, respectively. Rent expense for the years ended December 31, 2017, 2016 and 2015 was $3.1 million, $3.0 million and $0.9 million, respectively. Future minimum lease payments under noncancelable operating leases as of December 31, 2017 are as follows (in thousands):
2018 | $ | 6,574 |
2019 | 6,342 |
2020 | 4,775 |
2021 | 4,743 |
2022 | 4,885 |
Thereafter | 18,484 |
| $ | 45,803 |
Contingencies From time to time, the Company may be subject to various litigation and related matters arising in the ordinary course of business. The Company does not believe it is currently subject to any material matters where there is at least a reasonable possibility that a material loss may be incurred.

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- Definition The entire disclosure for commitments and contingencies. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -URI http://asc.fasb.org/topic&trid=2127136 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -URI http://asc.fasb.org/topic&trid=2144648 + Details
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