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Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2021
Goodwill And Intangible Assets Disclosure [Abstract] |
Reconciliation of Intangible Assets | The reconciliation of intangible assets for the years ended December 31, 2021 and 2020 (in thousands):
|  | Year Ended |  |  | Year Ended |
|  | December 31, |  |  | December 31, |
|  | 2021 |  |  | 2020 |
Patented technologies |  |  |  |  |  |  |  |
Gross carrying amount at beginning of period |  | $ | 68,322 |  |  | $ | 68,322 |
Gross carrying amount at end of period |  |  | 68,322 |  |  |  | 68,322 |
Accumulated amortization at beginning of period |  |  | (43,113 | ) |  |  | (40,653 | )
Amortization expense |  |  | (2,460 | ) |  |  | (2,460 | )
Accumulated amortization at end of period |  |  | (45,573 | ) |  |  | (43,113 | )
Net book value at end of period |  | $ | 22,749 |  |  | $ | 25,209 |
Schedule of Net Book Value of Intangible Assets | The net book value of the Company’s intangible assets at December 31, 2021 and 2020 is summarized as follows (in thousands):
|  |  |  |  |  |  |  |  |  | Estimated |
|  |  |  |  |  |  |  |  |  | Remaining |
|  |  |  |  |  |  |  |  |  | Useful Life at |
|  | December 31, |  |  | December 31, |  |  | December 31, |
|  | 2021 |  |  | 2020 |  |  | 2021 |
|  |  |  |  |  |  |  |  |  | (Years) |
Patented technologies |  |  |  |  |  |  |  |  |  |  |  |
DEXYCU / Verisome |  | $ | 22,749 |  |  | $ | 25,209 |  |  |  | 9.25 |
|  | $ | 22,749 |  |  | $ | 25,209 |  |  |  |  |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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- Definition Tabular disclosure of goodwill and intangible assets, which may be broken down by segment or major class. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 + Details
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