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Note 9 - Property and Equipment, Net - Summary of Property and Equipment, Net (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Land $ 2,510 $ 2,510  
Buildings 6,066 6,066  
Equipment 25,983 19,659  
Furniture and fixtures 693 734  
Leasehold improvements 2,999 2,335  
Transportation equipment 903 784  
Property leased to others 4,595 4,466  
ROU assets 4,418 4,156  
Property, Plant and Equipment, Gross, Ending Balance 48,167 40,710  
Buildings 2,369 2,228  
Equipment 17,919 16,724  
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Ending Balance 25,846 23,959  
Equipment pending for inspection 1,290 515  
Total 23,611 17,266 $ 15,551
Furniture and Fixtures [Member]      
Accumulated depreciation 623 668  
Leasehold Improvements [Member]      
Accumulated depreciation 2,106 1,936  
Transportation Equipment [Member]      
Accumulated depreciation 532 538  
Property Leased to Others [Member]      
Accumulated depreciation 693 621  
ROU Assets [Member]      
Accumulated depreciation $ 1,604 $ 1,244