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Additional Financial Statement Information | 12 Months Ended
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Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Additional Financial Statement Information | Additional Financial Statement Information The caption “Other” on the consolidated statements of operations consists of the following (in thousands):
| Years ended December 31,
| 2023 |  | 2022 |  | 2021
Foreign exchange (loss)/gain | $ | (822) |  |  | $ | 3,579 |  |  | $ | (110) |
Interest income | 1,651 |  |  | 401 |  |  | 252 |
Pension expense | (52) |  |  | (241) |  |  | (468) |
Other | (321) |  |  | (181) |  |  | 96 |
| $ | 456 |  |  | $ | 3,558 |  |  | $ | (230) |
Foreign currency exchange gains and losses represent the impact of changes in foreign currency exchange rates. The change in foreign exchange gains / (losses) for the year ended December 31, 2023, as compared to the prior year period, is primarily due to fluctuations in the Israeli shekel, the Canadian dollar and the British pound. The change in the dollar-shekel exchange rate resulted in a unfavorable currency exchange impact primarily related to the shekel-denominated lease liability for the Sensors facility in Israel. Foreign currency exchange gains and losses represent the impact of changes in foreign currency exchange rates. The change in foreign exchange gains / (losses) for the year ended December 31, 2022, as compared to the prior year period, is primarily due to fluctuations in the Israeli shekel, the Japanese yen and the British pound. The change in the dollar-shekel exchange rate resulted in a favorable currency exchange impact primarily related to the shekel-denominated lease liability for the Sensors facility in Israel. Pension expense represents the net periodic benefit cost excluding the service cost. Other accrued expenses consist of the following (in thousands):
| December 31,
| 2023 |  | 2022
Customer advance payments | $ | 8,712 |  |  | $ | 7,983 |
Accrued restructuring | 249 |  |  | 183 |
Goods received, not yet invoiced | 2,837 |  |  | 2,523 |
Accrued taxes, other than income taxes | 1,370 |  |  | 1,141 |
Accrued commissions | 4,077 |  |  | 3,217 |
Accrued professional fees | 1,343 |  |  | 1,360 |
Accrued technical warranty | 770 |  |  | 740 |
Current accrued pension and other post retirement costs | 511 |  |  | 505 |
Other | 2,558 |  |  | 2,654 |
| $ | 22,427 |  |  | $ | 20,306 |
Israeli Severance Pay The Israeli Severance Pay Law, 1963 ("Severance Pay Law"), specifies that employees of our Israeli subsidiary are entitled to severance payment, following the termination of their employment. Under the Severance Pay Law, the severance payment is calculated as one-month salary for each year of employment, or a portion thereof. Part of the subsidiary's liability for severance pay is covered by the provisions of Section 14 of the Severance Pay Law ("Section 14"). Under Section 14, employees are entitled to monthly deposits, at a rate of 8.33% of their monthly salary, contributed on their behalf to their insurance funds. Payments in accordance with Section 14 release the subsidiary from any future severance payments in respect of those employees. As a result, the Company does not recognize any liability for severance pay due to these employees and the deposits under Section 14 are not recorded as an asset in the Company's balance sheet. For the subsidiary's employees in Israel who are not subject to Section 14, the Company calculated the liability for severance pay pursuant to the Severance Pay Law based on the most recent salary of these employees multiplied by the number of years of employment as of the balance sheet date. The Company recorded as expenses the increase in the severance liability, net of earnings (losses) from the related investment fund. The subsidiary's liability was partially funded by monthly payments deposited with insurers and the value of these deposits is recorded as an asset on the Company's balance sheet. Any unfunded amounts would be paid from operating funds and are covered by a provision established by the subsidiary. The accompanying consolidated balance sheets at December 31, 2023 and December 31, 2022 include a $7.1 million and $7.0 million non-current liability, respectively, associated with Israeli severance requirements in other liabilities and a $5.3 million and $5.3 million non-current asset, respectively, associated with Israeli severance requirements in other assets.

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