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SEGMENT REPORTING (Schedule of Segment Reporting Infomation by Segment) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | $ 319,978 |  | $ 293,072 |  | $ 270,884
Operating income (loss) | 65,955 |  | 58,774 |  | 54,615
Assets | 138,496 |  | 132,680 |  | 117,847
Goodwill (Note 9) | 39,400 | [1] | 39,510 | [1] | 39,999
Expenditures for assets | 9,325 |  | 20,025 |  | 10,110
Depreciation and amortization | 14,779 |  | 14,638 |  | 13,553
Telematics Services [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | 234,541 |  | 209,558 |  | 189,649
Operating income (loss) | 65,039 |  | 56,287 |  | 48,072
Assets | 106,355 |  | 99,127 |  | 81,450
Goodwill (Note 9) | 33,940 |  | 33,990 |  | 34,215
Expenditures for assets | 8,837 |  | 19,024 |  | 9,404
Depreciation and amortization | 13,346 |  | 13,030 |  | 11,650
Telematics Products [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | 85,437 |  | 83,514 |  | 81,235
Operating income (loss) | 916 |  | 2,487 |  | 6,543
Assets | 32,141 |  | 33,553 |  | 36,397
Goodwill (Note 9) | 5,460 |  | 5,520 |  | 5,784
Expenditures for assets | 488 |  | 1,001 |  | 706
Depreciation and amortization | $ 1,433 |  | $ 1,608 |  | $ 1,903
[1] | The accumulated amount of goodwill impairment loss as of December 31, 2023, and 2022 was US$ 29.89 million.

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