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Property and Equipment | 12 Months Ended
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Dec. 31, 2013
Property and Equipment |
5. | Property and Equipment
Property and equipment as of December 31, 2013, and 2012 consist of the following (in thousands):
| Estimated Useful Life |  | December 31, |
| (In years) |  | 2013 |  |  | 2012 |
Manufacturing equipment | 5-14 |  | $ | 8,968 |  |  | $ | 7,574 |
Lab equipment | 5-13 |  |  | 7,227 |  |  |  | 6,755 |
Computer equipment | 3 |  |  | 1,962 |  |  |  | 1,807 |
Furniture and fixtures | 3 |  |  | 1,056 |  |  |  | 983 |
Leasehold improvements | 5-7 |  |  | 6,048 |  |  |  | 5,445 |
Assets in progress |  |  |  | 762 |  |  |  | 1,047 |
|  |  |  | 26,023 |  |  |  | 23,611 |
Less accumulated depreciation and amortization |  |  |  | (17,317 | ) |  |  | (15,646 | )
Total |  |  | $ | 8,706 |  |  | $ | 7,965 |
Depreciation and amortization expense on property and equipment was $1.3 million, $1.2 million and $1.3 million for the years ended December 31, 2013, 2012 and 2011, 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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2921-110230 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13-14) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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