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Goodwill and Intangible Assets, Net - Amortization Expense by Income Statement Caption (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross | $ 38,275 | $ 35,410
Accumulated Amortization | (17,580) | (15,700)
Total | 20,695 | 19,710
Gross value of fully amortized intangible assets | 43,100 | 42,700
Capitalized software development costs |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross | 1,018 | 477
Accumulated Amortization | (15) | 0
Total | 1,003 | 477
Customer relationships |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross | 8,100 | 8,100
Accumulated Amortization | (4,859) | (4,329)
Total | 3,241 | 3,771
Developed and core technology |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross | 4,080 | 4,080
Accumulated Amortization | (3,262) | (3,044)
Total | 818 | 1,036
Distribution rights |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross | 333 | 352
Accumulated Amortization | (268) | (261)
Total | 65 | 91
Patents |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross | 23,944 | 21,601
Accumulated Amortization | (8,603) | (7,574)
Total | 15,341 | 14,027
Trademarks and trade names |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross | 800 | 800
Accumulated Amortization | (573) | (492)
Total | $ 227 | $ 308

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