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Property and Equipment
 12 Months Ended
Dec. 31, 2019
Property, Plant and Equipment [Abstract]  
Property and Equipment Property and Equipment
Property and equipment, net, consisted of:
December 31,
 20192018
Computer equipment and software$1,112  $833  
Furniture and fixtures366  389  
Machinery and equipment3,142  2,723  
Leasehold improvements609  609  
Construction in process70  481  
5,299  5,035  
Less: accumulated depreciation(2,247) (1,151) 
$3,052  $3,884  
Depreciation expense was $1,106 and $535 for the years ended December 31, 2019 and 2018, respectively. In addition, depreciation expense of $315 and $49 was charged to inventory and prepaid expenses and other assets, respectively, as of December 31, 2019, which represents depreciation expense related to equipment involved in the manufacturing process.