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Property and equipment, net - Note 6 | 12 Months Ended
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Dec. 31, 2017
Notes to Financial Statements |
Property and equipment, net - Note 6 | 6. PROPERTY AND EQUIPMENT Property and equipment consists of the following (in thousands):
|  |  | December 31,
|  |  | 2017 |  |  | 2016
Production equipment |  | $ | 6,573 |  | $ | 4,580
Leasehold improvements |  |  | 601 |  |  | 494
Computer hardware and software/lab equipment |  |  | 5,515 |  |  | 4,968
Office furniture and equipment |  |  | 1,304 |  |  | 1,096
|  |  | 13,993 |  |  | 11,138
Less: Accumulated depreciation |  |  | (10,742) |  |  | (9,601)
|  | $ | 3,251 |  | $ | 1,537
Depreciation expense was $1.1 million in 2017, $1.1 million in 2016, and $429,000 in 2015. In the fourth quarter of 2016, we recorded additional depreciation expense of $297,000, as a result of a change in the estimated useful life of production equipment to be replaced in connection with our current business strategy to sell LBS engines directly to ODMs and OEMs. Capital leases are collateralized by the related assets financed and by security deposits held by the lessors under the lease agreements. The cost and accumulated depreciation of equipment under capital leases was $704,000 in each of the years ended December 31, 2017 and 2016.

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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 -URI http://asc.fasb.org/topic&trid=2155823 + Details
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