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Leases | 12 Months Ended
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Dec. 31, 2017
Leases [Abstract] |
Leases | 14. Leases The Company leases fill/finish, manufacturing, laboratory, warehouse and office facilities, office equipment and vehicles under various operating lease agreements. The Company leases a fill/finish space in Rockville, Maryland under an operating lease that contains no escalation clause, which expires in May 2027. The Company leases office and warehouse space in Baltimore, Maryland under an operating lease that contains a 2.75% escalation clause, which expires in July 2027. The Company leases office and warehouse space in Canton, Massachusetts, under an operating lease that contains a 3.0% escalation clause, which expires in April 2023. The Company leases office space in Washington, D.C. under an operating lease that contains a 2.5% escalation clause, which expires in March 2027. For the years ended December 31, 2017, 2016, and 2015, total lease expense was $1.6 million, $1.4 million and $1.3 million, respectively. Future minimum lease payments under operating lease obligations as of December 31, 2017 were as follows:
(in thousands) |  |  |
2017 |  | $ | 1,626 |
2018 |  |  | 1,391 |
2019 |  |  | 1,339 |
2020 |  |  | 1,343 |
2021 |  |  | 1,346 |
2022 and beyond |  |  | 3,685 |
Total minimum lease payments |  | $ | 10,730 |

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- Definition The entire disclosure for lessee entity's leasing arrangements including, but not limited to, all of the following: (a.) The basis on which contingent rental payments are determined, (b.) The existence and terms of renewal or purchase options and escalation clauses, (c.) Restrictions imposed by lease agreements, such as those concerning dividends, additional debt, and further leasing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=77888251 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -URI http://asc.fasb.org/topic&trid=2208923 + Details
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