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Goodwill and Intangible Assets | 12 Months Ended
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Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Intangible Assets |
(4) | Goodwill and Intangible Assets
There were no changes to the Company’s goodwill balance during the years ended December 31, 2020 and 2019. The following is a summary of the Company’s acquired intangible assets as of December 31 (dollars in thousands):
2020 |  | Weighted average amortization period (years) |  |  | Gross carrying amount |  |  | Accumulated amortization |  |  | Intangibles, net |
Customer relationships |  |  | 10 |  |  | $ | 4,830 |  |  | $ | 2,203 |  |  | $ | 2,627 |
Developed technologies |  |  | 9 |  |  |  | 1,080 |  |  | $ | 539 |  |  |  | 541 |
Tradename |  |  | 3 |  |  |  | 120 |  |  | $ | 120 |  |  |  | — |
Total |  |  |  |  |  | $ | 6,030 |  |  | $ | 2,862 |  |  | $ | 3,168 |
2019 |  |  |  |  |  |  |  |  |  |  |  |
Customer relationships |  |  | 10 |  |  | $ | 4,830 |  |  | $ | 1,720 |  |  | $ | 3,110 |
Developed technologies |  |  | 9 |  |  |  | 1,080 |  |  |  | 406 |  |  |  | 674 |
Tradename |  |  | 3 |  |  |  | 120 |  |  |  | 107 |  |  |  | 13 |
Total |  |  |  |  |  | $ | 6,030 |  |  | $ | 2,233 |  |  | $ | 3,797 |
The estimated annual amortization of intangible assets for the next five years and thereafter is shown in the following table (actual amortization expense to be reported in future periods could differ from these estimates as a result of acquisitions, divestitures, and asset impairments, among other factors) (in thousands):
|  | Estimated future amortization |
2021 |  | $ | 598 |
2022 |  |  | 563 |
2023 |  |  | 563 |
2024 |  |  | 563 |
2025 |  |  | 551 |
Thereafter |  |  | 330 |
Total |  | $ | 3,168 |
Amortization expense was $0.6 million and $0.7 million for the years ended December 31, 2020 and 2019, respectively.

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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