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Other Assets | 12 Months Ended
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Dec. 31, 2024
Other Assets [Abstract] |
Other Assets | 6. Other Assets Other assets consist of the following:
December 31, |  | 2024 |  |  | 2023 |
Patents, at cost |  | $ | 10,339 |  |  | $ | 10,280 |
Deposits on capital items |  |  | 18,443 |  |  |  | 23,045 |
Marlin trade name, at cost |  |  | 7,800 |  |  |  | 7,800 |
Accumulated amortization |  |  | (8,008 | ) |  |  | (7,171 | )
Other |  |  | 9,173 |  |  |  | 9,958 |
|  | $ | 37,747 |  |  | $ | 43,912 |
The capitalized cost of patents is amortized using the straight-line method over their useful lives. Expenses related to patent amortization was $0.5 million in 2024, $0.4 million in 2023, and $0.4 million in 2022. The estimated annual patent amortization expense for each of the next five years is $0.4 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.

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