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Property and Equipment
 12 Months Ended
Dec. 31, 2021
Property, Plant and Equipment [Abstract]  
Property and Equipment Property and Equipment
Property and equipment, net, as of December 31, 2021 and 2020 consist of the following:
 December 31,
 20212020
Land$3,828 $3,828 
Building and improvements24,271 24,197 
Leasehold improvements472 482 
Revenue-generating assets63,587 56,336 
Machinery and equipment16,790 15,536 
Office and computer equipment15,395 13,855 
Motor vehicles31 31 
124,374 114,265 
Less accumulated depreciation(64,260)(57,992)
$60,114 $56,273 

Depreciation expense for the years ended December 31, 2021 and 2020 amounted to $13,574 and $10,659, respectively.

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