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Property and Equipment
3 Months Ended
Mar. 31, 2020
Property, Plant and Equipment [Abstract]  
Property and Equipment Property and Equipment
Property and equipment, net, as of March 31, 2020 and December 31, 2019 consist of the following:

March 31,
2020
December 31,
2019
Land$3,828  $3,828  
Building and improvements24,185  24,172  
Leasehold improvements499  501  
Machinery and equipment18,381  18,022  
Revenue-generating assets49,810  47,010  
Office and computer equipment14,259  14,054  
Motor vehicles31  31  
110,993  107,618  
Less accumulated depreciation(56,237) (54,034) 
$54,756  $53,584  

Depreciation expense was $2,402 and $2,093 for the three months ended March 31, 2020 and 2019, respectively.
Certain revenue-generating hardware assets are utilized by the Company in the delivery of the Company's airtime services, media, and other content.