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CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Revenues: |  |  |  |
Telematics services | $ 204,728 |  | $ 181,357 | $ 169,752
Telematics products | 74,604 |  | 71,978 | 64,884
Total revenues | 279,332 |  | 253,335 | 234,636
Cost of revenues: |  |  |  |
Telematics services | 90,158 |  | 70,329 | 60,256
Telematics products | 58,656 |  | 55,678 | 54,996
Total cost of revenues | 148,814 |  | 126,007 | 115,252
Gross profit | 130,518 |  | 127,328 | 119,384
Research and development expenses | 13,913 |  | 6,223 | 3,160
Selling and marketing expenses | 12,778 |  | 11,340 | 12,246
General and administrative expenses | 55,166 |  | 47,693 | 47,590
Impairment of goodwill | 12,292 | [1] |  |
Impairment of intangible assets and Other expenses (income), net | 13,715 |  | (306) | (147)
Operating income | 22,654 |  | 62,378 | 56,535
Other income (expense), net | (26) |  | 13,138 |
Financing income (expenses), net | 576 |  | 717 | (989)
Income before income tax | 23,204 |  | 76,233 | 55,546
Income tax expenses | (12,234) |  | (17,273) | (17,705)
Share in gains (losses) of affiliated companies, net | (3,203) |  | 4,219 | 8,520
Net income for the year | 7,767 |  | 63,179 | 46,361
Less: Net income attributable to non-controlling interest | (878) |  | (2,504) | (2,567)
Net income attributable to the Company | $ 6,889 |  | $ 60,675 | $ 43,794
Basic and diluted earnings per share attributable to Company's stockholders | $ 0.33 |  | $ 2.88 | $ 2.09
Basic and diluted weighted average number of shares outstanding | 21,037 |  | 21,077 | 20,968
[1] | As a result of the circumstances described in note 9 the company recorded a goodwill impairment in the total amount of US$ 12.3 million in connection with two reporting units (both units related to Road track operations, see Note 3). One reporting unit within the Telematics services and the other reporting unit within the Telematics product's segments. The impairment was based on valuation performed by the management using the assistance of a third party appraiser in accordance with the income approach. The significant assumptions used for the assessment were discount rate of 14.9% and a long-term growth rate of 0.5%.

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