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Property and Equipment (Tables)
12 Months Ended
Dec. 31, 2020
Property, Plant and Equipment [Abstract]  
Property and equipment
   December 31,
   2020  2019
Land and land improvements  $3,764   $2,688 
Buildings and improvements   8,930    8,962 
Machinery and equipment   13,952    13,621 
Rental equipment   5,895    5,201 
           
    32,541    30,472 
Less: accumulated depreciation and amortization   (13,939)   (12,737)
           
   $18,602   $17,735