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Commitments and Contingencies | 12 Months Ended
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Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract] |
Commitments and Contingencies | 9. Commitments and Contingencies Operating Leases The Company leases office and laboratory space for its headquarters in Rockville, Maryland. In 2014, that lease was amended to extend its term from March 31, 2018 to January 31, 2020. In addition, in 2014, the Company leased additional office space adjacent to its headquarters, also through January 31, 2020. The Company has an option under each lease to continue the respective lease for five years under the same terms. The Company leases a manufacturing facility in Rockville under a lease that originally expired on December 31, 2014. During 2014, the Company exercised its 5-year renewal option on the manufacturing facility. The Company also entered into a new four-year lease for additional space in the manufacturing facility effective April 1, 2014. This lease also has an option to continue the lease for five years under the same terms. The Company also leases office and laboratory space in South San Francisco under a lease that expires on February 28, 2018. 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, 2014 and 2013, the Company had recorded a deferred rent liability of $2.7 million and $2.9 million, respectively. Rent expense for the years ended December 31, 2014, 2013 and 2012 was $2.0 million, $2.7 million and $2.7 million, respectively. Future minimum lease payments under noncancelable operating leases as of December 31, 2014 are as follows (in thousands):
2015 |  | $ | 3,945 |
2016 |  |  | 4,364 |
2017 |  |  | 4,495 |
2018 |  |  | 4,396 |
2019 |  |  | 1,873 |
Thereafter |  |  | 116 |
|  | $ | 19,189 |
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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