| Dec 31,
2015 | Dec 31,
2016 | Dec 31,
2017 | Dec 31,
2018 | Dec 31,
2019 | Dec 31,
2020 | Dec 31,
2021 | Dec 31,
2022 | Dec 31,
2023 |
|---|
| Net sales | - | 37,915 | 67,016 | 79,149 | 18,828 | 6,147 | 4,091 | 5,421 | 8,625 |
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| Cost of sales | - | 30,600 | 55,312 | 70,524 | 22,920 | 4,506 | 1,727 | 2,472 | 5,189 |
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| Gross profit (loss) | - | 7,315 | 11,704 | 8,625 | -4,092 | 1,641 | 2,363 | 2,949 | 3,436 |
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| Selling, general and administrative expenses | - | 3,508 | 5,806 | 7,903 | 5,579 | 2,306 | 2,063 | 2,304 | 2,687 |
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| Operating profit (loss) | - | 3,807 | 5,899 | 722 | -9,671 | -664 | 300 | 645 | 749 |
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| Interest income | - | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 |
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| Dividend income | - | 0 | 2 | 27 | 1 | 1 | 5 | 10 | 10 |
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| Gain on investments in investment partnerships | - | - | - | - | 10 | 12 | 43 | 13 | 0 |
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| Gain on insurance cancellation | - | - | - | 14 | - | - | - | 15 | - |
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| Other | - | 0 | 2 | 5 | 1 | 15 | 11 | 5 | 5 |
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| Gain on sale of goods | - | 3 | 2 | 4 | - | - | - | 0 | 2 |
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| Non-operating income | - | 4 | 58 | 51 | 23 | 34 | 60 | 43 | 18 |
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| Other | - | 0 | 2 | 5 | 1 | 15 | 11 | 5 | 5 |
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| Non-operating income | - | 4 | 58 | 51 | 23 | 34 | 60 | 43 | 18 |
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| Interest expenses | - | - | 11 | 13 | 49 | 35 | 0 | 7 | 14 |
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| Guarantee commission | - | - | - | - | - | - | - | 4 | 1 |
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| Loss on investments in investment partnerships | - | 2 | 3 | 3 | 3 | 2 | 1 | 1 | 2 |
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| Loss on investments in investment partnerships | - | 2 | 3 | 3 | 3 | 2 | 1 | 1 | 2 |
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| Commission expenses | - | - | 78 | 10 | 178 | 18 | 2 | 9 | 9 |
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| Commission expenses | - | - | 78 | 10 | 178 | 18 | 2 | 9 | 9 |
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| Other | - | 0 | 1 | 11 | 24 | 9 | 1 | 2 | 3 |
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| Other | - | 0 | 1 | 11 | 24 | 9 | 1 | 2 | 3 |
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| Non-operating expenses | - | 7 | 93 | 265 | 474 | 64 | 5 | 23 | 29 |
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| Non-operating expenses | - | 7 | 93 | 265 | 474 | 64 | 5 | 23 | 29 |
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| Ordinary profit (loss) | - | 3,804 | 5,864 | 508 | -10,123 | -694 | 355 | 665 | 738 |
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| Gain on sale of non-current assets | - | 1 | 1 | - | - | 5 | 0 | - | 0 |
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| Gain on sale of investment securities | - | - | - | 2,448 | - | - | 8 | 33 | 165 |
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| Gain on reversal of share acquisition rights | - | - | - | - | 1 | 1 | 0 | - | 16 |
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| Gain on sale of investment securities | - | - | - | 2,448 | - | - | 8 | 33 | 165 |
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| Gain on reversal of asset retirement obligations | - | - | - | - | 50 | 10 | - | 6 | - |
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| Gain on reversal of share acquisition rights | - | - | - | - | 1 | 1 | 0 | - | 16 |
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| Gain on reversal of asset retirement obligations | - | - | - | - | 50 | 10 | - | 6 | - |
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| Extraordinary income | - | 1 | 171 | 2,448 | 111 | 16 | 8 | 40 | 181 |
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| Loss on retirement of non-current assets | - | 5 | - | - | - | - | - | 2 | - |
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| Loss on sale of non-current assets | - | - | - | - | - | - | 0 | 0 | 0 |
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| Loss on retirement of non-current assets | - | 5 | - | - | - | - | - | 2 | - |
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| Loss on valuation of investment securities | - | - | 127 | 100 | 154 | 293 | 41 | 103 | 38 |
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| Loss on valuation of investment securities | - | - | 127 | 100 | 154 | 293 | 41 | 103 | 38 |
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| Extraordinary losses | - | 5 | 127 | 284 | 4,485 | 331 | 41 | 105 | 38 |
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| Extraordinary losses | - | 5 | 127 | 284 | 4,485 | 331 | 41 | 105 | 38 |
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| Profit (loss) before income taxes | - | 3,800 | 5,908 | 2,672 | -14,496 | -1,010 | 322 | 599 | 881 |
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| Income taxes - current | - | 1,505 | 2,105 | 1,550 | -11 | 19 | 36 | 13 | 27 |
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| Income taxes - deferred | - | -55 | -211 | 298 | 103 | -21 | -88 | -133 | -34 |
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| Income taxes | - | 1,451 | 1,894 | 1,848 | 91 | -2 | -52 | -120 | -7 |
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| Profit (loss) | - | 2,349 | 4,014 | 823 | -14,588 | -1,007 | 374 | 719 | 887 |
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| Profit (loss) attributable to non-controlling interests | - | -5 | 18 | 2 | -51 | - | - | -0 | 1 |
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| Profit (loss) attributable to owners of parent | - | 2,354 | 3,995 | 822 | -14,537 | -1,007 | 374 | 719 | 886 |
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