pre_text: Property and equipment consist of the following (in thousands): (1) Lesser of the lease term or the estimated useful lives of the improvements, which generally may be up to 5 years. Depreciation and amortization expense for the years ended December 31, 2019, 2018 and 2017 was $2.2 million, $1.8 million and $1.9 million, respectively.
table: As of December 31,
table: Useful life in years 2019 2018
table: Furniture and equipment 5 $1,785 $1,189
table: Leasehold improvements (1) 5 4,074 2,776
table: System hardware 5 1,596 1,404
table: Office computers 3 5,309 3,745
table: Computer and system software 3 1,451 1,385
table: 14,215 10,499
table: Less accumulated depreciation and amortization (7,931) (5,849)
table: Property and equipment, net $6,284 $4,650
question: Analyse this data from a financial earnings document. What is the change in System hardware from December 31, 2019 to December 31, 2018?