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Intangible assets, net | 12 Months Ended
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Dec. 31, 2022
Intangible assets, net [Abstract] |
Intangible assets, net | 5. Intangible assets, net Identifiable intangible assets are recorded in Intangible assets, net in the accompanying Consolidated Balance Sheets and are comprised of the following:
|  | December 31, |
|  | 2022 |  |  | 2021 |
(In thousands) |  | Gross Amount |  |  | Accumulated Amortization |  |  | Gross Amount |  |  | Accumulated Amortization |
Purchased technology |  | $ | 1,591 |  |  | $ | (1,349 | ) |  | $ | 1,591 |  |  | $ | (1,195 | )
Patents |  |  | 15 |  |  |  | (15 | ) |  |  | 15 |  |  |  | (14 | )
Total |  | $ | 1,606 |  |  | $ | (1,364 | ) |  | $ | 1,606 |  |  | $ | (1,209 | )
Amortization expense was $155 thousand and $186 thousand in 2022 and 2021, respectively. Amortization expense for each of the next five years ending December 31 is expected to be as follows: $154 thousand in 2023 and $88 thousand in 2024; and none thereafter.

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -URI https://asc.fasb.org/subtopic&trid=2144471 + Details
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