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Other Assets
 12 Months Ended
Dec. 31, 2023
Other Assets [Abstract]  
Other Assets
6.Other Assets

 

Other assets consist of the following:

 

December 31,  2023   2022 
         
Patents, at cost  $10,280   $10,126 
Accumulated amortization   (7,171)   (6,318)
Deposits on capital items   23,045    17,106 
Marlin trade name   7,800    7,800 
Other   9,958    11,249 
   $43,912   $39,963 

 

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 2023, $0.4 million in 2022, and $0.3 million in 2021. The estimated annual patent amortization expense for each of the next five years is $0.3 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.