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INTANGIBLE ASSETS | 12 Months Ended
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Dec. 31, 2022
INTANGIBLE ASSETS |
INTANGIBLE ASSETS | NOTE 9—INTANGIBLE ASSETS The carrying amount of intangible assets, net of accumulated amortization and impairment charges, as of December 31, 2022 and 2021 consisted of the following: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | 2022 | ​
​ | ​ | ​ | ​ |  | Gross |  |  | ​ | ​ | ​ | ​ |  | ​ | ​ |  | ​ | ​ |
​ | ​ | ​ | Carrying | ​ | ​ | ​ | ​ | Accumulated | ​ | Currency | ​ | Net Book | ​
​ | Estimated Useful Lives | ​ | Amount | ​ | Acquisitions | ​ | Amortization | ​ | impact | ​ | Value | ​
Amortizable intangibles: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Customer relationships | 2 to 15 |  | years | ​ | $ | 75,283 | ​ | $ | 2,900 | ​ | $ | (70,273) | ​ | $ | (115) | ​ | $ | 7,795 | ​
Noncompete agreements | 4 to 7 | ​ | years | ​ |  | 5,962 | ​ |  | 300 | ​ |  | (5,987) | ​ | ​ | — | ​ |  | 275 | ​
Software | 3 to 4 | ​ | years | ​ |  | 1,660 | ​ |  | — | ​ |  | (1,557) | ​ | ​ | — | ​ |  | 103 | ​
Backlog | 1 to 2 | ​ | years | ​ |  | 5,002 | ​ |  | — | ​ |  | (4,981) | ​ | ​ | (21) | ​ |  | — | ​
Databases | 4 to 15 | ​ | years | ​ |  | 13,218 | ​ |  | — | ​ |  | (7,905) | ​ | ​ | (183) | ​ |  | 5,130 | ​
Trademark and trade names | 3 to 5 | ​ | years | ​ |  | 1,490 | ​ |  | 1,100 | ​ |  | (1,513) | ​ | ​ | — | ​ |  | 1,077 | ​
Intangibles | ​ | ​ | ​ | ​ | $ | 102,615 | ​ | $ | 4,300 | ​ | $ | (92,216) | ​ | $ | (319) | ​ | $ | 14,380 | ​
​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | 2021 |
​ | ​ | ​ | ​ |  | Gross |  | ​ | ​ | ​ | ​ | ​ |  | ​ | ​ |  | ​ | ​ |
​ | ​ | ​ | Carrying | ​ | ​ | ​ | ​ | Accumulated | ​ | Currency | ​ | Net Book |
​ | Estimated Useful Lives | ​ | Amount |  | Acquisitions | ​ | Amortization |  | impact |  | Value |
Amortizable intangibles: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Customer relationships | 2 to 15 |  | years | ​ | $ | 75,283 | ​ | $ | — | ​ | $ | (68,677) | ​ | $ | (111) | ​ | $ | 6,495 | ​
Noncompete agreements | 4 to 7 | ​ | years | ​ |  | 5,962 | ​ |  | — | ​ |  | (5,960) | ​ | ​ | — | ​ |  | 2 | ​
Software | 3 to 4 | ​ | years | ​ |  | 1,660 | ​ |  | — | ​ |  | (1,534) | ​ | ​ | — | ​ |  | 126 | ​
Backlog | 1 to 2 | ​ | years | ​ |  | 5,002 | ​ |  | — | ​ |  | (4,981) | ​ | ​ | (21) | ​ |  | — | ​
Databases | 4 to 15 | ​ | years | ​ |  | 13,218 | ​ |  | — | ​ |  | (7,371) | ​ | ​ | (180) | ​ |  | 5,667 | ​
Trademark and trade names | 3 to 5 | ​ | years | ​ |  | 1,490 | ​ |  | — | ​ |  | (1,370) | ​ | ​ | — | ​ |  | 120 | ​
Intangibles | ​ | ​ | ​ | ​ | $ | 102,615 | ​ | $ | — | ​ | $ | (89,893) | ​ | $ | (312) | ​ | $ | 12,410 | ​
​ Amortization expense was $2.3 million and $2.6 million for the years ended December 31, 2022 and 2021, respectively. The estimated future amortization expense subsequent to December 31, 2022 is as follows: ​
​ | ​ | ​ | ​ | ​
2023 |  | $ | 3,126 |
2024 | ​ |  | 2,550 | ​
2025 | ​ |  | 2,052 | ​
2026 | ​ |  | 1,533 | ​
2027 | ​ | ​ | 1,344 | ​
Thereafter | ​ |  | 3,775 | ​
​ | ​ | $ | 14,380 | ​
​

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