Composition of Certain Balance Sheet Items |
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Dec. 31, 2017 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Composition of Certain Balance Sheet Items [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Composition of Certain Balance Sheet Items | Composition of Certain Balance Sheet Items Property and Equipment, net Property and equipment, net consisted of the following (in thousands):
Depreciation expense was $3.1 million, $2.4 million and $0.8 million for the years ended December 31, 2017, 2016 and 2015, respectively. The depreciation expense for the year ended December 31, 2016 includes incremental depreciation of $1.2 million associated with the acceleration of the useful life of certain leasehold improvements and other assets that were at the Company's former South San Francisco facility. See Note 7, “Commitments and Contingencies.” Other Current Liabilities Other current liabilities consisted of the following (in thousands):
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