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Other Assets
 12 Months Ended
Dec. 31, 2022
Disclosure Text Block Supplement [Abstract]  
Other Assets

7.       Other Assets

Other assets consist of the following:

 

December 31,  2022   2021 
         
Patents, at cost  $10,126   $10,024 
Accumulated amortization   (6,318)   (5,360)
Deposits on capital items   17,106    18,026 
Marlin trade name   7,800    7,800 
Other   11,249    8,953 
   $39,963   $39,443 

 

The capitalized cost of patents is amortized using the straight-line method over their useful lives. Expenses related to patent amortization was $0.4 million in 2022 and $0.3 million in 2021, and 2020. The estimated annual patent amortization expense for each of the next five years is $0.2

million. Costs incurred to maintain existing patents are charged to expense in the year incurred. The Marlin trade name will be amortized using the straight-line method over its useful life. The estimated annual trade name amortization cost for each of the next five years is $0.4 million. The intangible asset related to Marlin customer relationships are included in Other above and will be amortized using the straight-line method over its useful life. The estimated annual customer relationship name amortization expense for each of the next five years is $0.1 million.