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Goodwill and Intangible Assets | 12 Months Ended
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Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Intangible Assets | Goodwill and Intangible Assets The changes in the carrying amount of goodwill by reportable segment were as follows:
($ in millions) | Proprietary Products |  | Contract-Manufactured Products |  | Total
Balance, December 31, 2019 | $ | 78.1 |  |  | $ | 29.7 |  |  | $ | 107.8 |
Foreign currency translation | 2.8 |  |  | 0.5 |  |  | 3.3 |
Balance, December 31, 2020 | 80.9 |  |  | 30.2 |  |  | 111.1 |
Goodwill recorded due to acquisition | 1.7 |  |  | — |  |  | 1.7 |
Goodwill impairment charge | (0.1) |  |  | — |  |  | (0.1) |
Foreign currency translation | (2.4) |  |  | (0.4) |  |  | (2.8) |
Balance, December 31, 2021 | $ | 80.1 |  |  | $ | 29.8 |  |  | $ | 109.9 |
As of December 31, 2021, we had $0.1 million in accumulated goodwill impairment losses. Intangible assets and accumulated amortization as of December 31 were as follows:
| 2021 |  | 2020
($ in millions) | Cost |  | Accumulated amortization |  | Net |  | Cost |  | Accumulated amortization |  | Net
Patents and licensing | $ | 25.1 |  |  | $ | (19.4) |  |  | $ | 5.7 |  |  | $ | 25.9 |  |  | $ | (17.9) |  |  | $ | 8.0 |
Technology | 3.3 |  |  | (2.0) |  |  | 1.3 |  |  | 3.3 |  |  | (1.7) |  |  | 1.6 |
Trademarks | 2.0 |  |  | (1.9) |  |  | 0.1 |  |  | 2.0 |  |  | (1.8) |  |  | 0.2 |
Customer relationships | 40.1 |  |  | (25.4) |  |  | 14.7 |  |  | 40.9 |  |  | (23.4) |  |  | 17.5 |
Customer contracts | 10.6 |  |  | (9.4) |  |  | 1.2 |  |  | 11.1 |  |  | (7.9) |  |  | 3.2 |
| $ | 81.1 |  |  | $ | (58.1) |  |  | $ | 23.0 |  |  | $ | 83.2 |  |  | $ | (52.7) |  |  | $ | 30.5 |
The cost basis of intangible assets includes a foreign currency translation loss of $1.3 million and a foreign currency translation gain of $1.3 million for the years ended December 31, 2021 and 2020, respectively. Amortization expense for the years ended December 31, 2021, 2020 and 2019 was $5.4 million, $4.4 million and $3.4 million, respectively. Estimated annual amortization expense for the next five years is as follows: 2022 - $4.0 million, 2023 - $4.0 million, 2024 - $4.0 million, 2025 - $3.0 million and 2026 - $2.8 million.

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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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