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Other Assets (Tables) | 3 Months Ended
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Mar. 31, 2021
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |
Schedule of Other Assets | Other assets consisted of the following (in thousands):
| As of
| March 31, 2021 |  | December 31, 2020
Demonstration assets, net | $ | 2,472 |  |  | $ | 2,598 |
Deferred tax assets, net | 66 |  |  | 69 |
Other | 2,500 |  |  | 2,500 |
| $ | 5,038 |  |  | $ | 5,167 |
Amortization expense was as follows for the periods presented (in thousands):
|  |  | Three Months Ended March 31,
|  |  |  |  | 2021 |  | 2020 |  |
Amortization expense |  |  |  |  | $ | 541 |  |  | $ | 504 |  |  |

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- Definition Tabular disclosure of noncurrent assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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