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Property, Equipment and Software | 12 Months Ended
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Dec. 31, 2018
Property, Plant and Equipment [Abstract] |
Property, Equipment and Software | Property, Equipment and SoftwareProperty, equipment and software consists of the following (in thousands):
| December 31, |  |
| 2018 |  | 2017
Computer equipment | $ | 2,360 |  | $ | 2,261
Software | 7,011 |  | 5,111
Furniture and office equipment | 668 |  | 656
Lab equipment | 36,062 |  | 20,549
Leasehold improvements | 48,328 |  | 17,525
Construction in progress | 218 |  | 32,800
Property, equipment and software | 94,647 |  | 78,902
Less accumulated depreciation and amortization | (37,935) |  | (28,919)
Property, equipment and software, net | $ | 56,712 |  | $ | 49,983
Construction in progress at December 31, 2017 consisted of the costs incurred for the build-out of a manufacturing suite at the Company's headquarters building in Rockville, Maryland, which was completed in mid-2018. We had $0.6 million in property, equipment and software at December 31, 2018 that was purchased in 2018 but was not paid for by year end. Property, equipment and software balance at December 31, 2017 includes approximately $9.6 million in assets that were purchased in 2017 but were not paid for by year end. Depreciation and amortization expense related to property, equipment and software for the years ended December 31, 2018, 2017 and 2016 was $9.2 million, $7.0 million and $6.8 million, respectively.

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- Definition The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 + Details
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