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Supplemental Financial Statement Information | 9 Months Ended
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Sep. 30, 2021
Organization Consolidation And Presentation Of Financial Statements [Abstract] |
Supplemental Financial Statement Information | (8) Supplemental Financial Statement Information Property and Equipment Property and equipment consisted of the following (in thousands):
|  | At December 31, 2020 |  |  | At September 30, 2021 |
Computer and other related equipment |  | $ | 13,278 |  |  | $ | 13,286 |
Purchased and internally developed software |  |  | 2,058 |  |  |  | 2,846 |
Furniture and fixtures |  |  | 1,271 |  |  |  | 1,271 |
Leasehold improvements |  |  | 1,737 |  |  |  | 1,732 |
|  | $ | 18,344 |  |  | $ | 19,135 |
Less: Accumulated depreciation and amortization |  |  | (15,597 | ) |  |  | (16,510 | )
Property and equipment, net |  | $ | 2,747 |  |  | $ | 2,625 |
We capitalize certain software development costs incurred in connection with developing or obtaining computer software for internal use when both the preliminary project stage is completed and it is probably that the software will be used as intended. Capitalized software costs include (i) external direct costs of materials and services utilized in developing computer software, (ii) compensation and related benefits for employees who are directly associated with the software projects. Capitalized software costs are amortized on a straight-line basis when place into service over the estimated useful lives of the software. Depreciation and amortization expense related to property and equipment was approximately $363,000 and $278,000 for the three months ended September 30, 2020 and 2021, respectively. Depreciation and amortization expense related to property and equipment was approximately $1.2 million and $965,000 for the nine months ended September 30, 2020 and 2021, respectively. Interest income and other Interest income and other consists of the following (in thousands):
|  | For the Nine Months Ended |  |  | For the Three Months Ended |
|  | 2020 |  |  | 2021 |  |  | 2020 |  |  | 2021 |
Interest Income |  | $ | 103 |  |  | $ | 8 |  |  | $ | 1 |  |  | $ | 7 |
Interest Expense & Foreign Currency |  |  | (19 | ) |  |  | (45 | ) |  |  | (11 | ) |  |  | (14 | )
Other |  |  | 55 |  |  |  | 2,490 |  |  |  | 7 |  |  |  | (14 | )
Total |  | $ | 139 |  |  | $ | 2,453 |  |  | $ | (3 | ) |  | $ | (21 | )
During the second quarter of 2021, we received $2.5 million related to a contractual settlement of an upside payment with previously divested properties.

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