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Property and Equipment
 12 Months Ended
Dec. 31, 2020
Property, Plant and Equipment [Abstract]  
Property and Equipment Property and Equipment
Property and equipment, net, as of December 31, 2020 and 2019 consist of the following:
 December 31,
 20202019
Land$3,828 $3,828 
Building and improvements24,197 24,172 
Leasehold improvements482 501 
Revenue-generating assets56,336 47,010 
Machinery and equipment15,536 18,022 
Office and computer equipment13,855 14,054 
Motor vehicles31 31 
114,265 107,618 
Less accumulated depreciation(57,992)(54,034)
$56,273 $53,584 

Depreciation expense for the years ended December 31, 2020 and 2019 amounted to $10,659 and $8,798, respectively.

Certain revenue-generating hardware assets are utilized by the Company in the delivery of the Company's airtime services, media, and other content.