| 2011年 12月31日 | 2012年 12月31日 | 2013年 12月31日 | 2014年 12月31日 | 2015年 12月31日 | 2016年 12月31日 | 2017年 12月31日 | 2018年 12月31日 | 2019年 12月31日 | 2020年 12月31日 | 2021年 12月31日 | 2022年 12月31日 | 2023年 12月31日 |
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Cash and cash equivalents | 25 | 8 | 29 | 21 | 28 | 20 | 30 | 59 | 45 | 22 | 32 | 5 | - |
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Cash and cash equivalents | - | - | - | - | - | - | - | - | - | - | - | 5 | 3,565 |
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Short-term investments | 20 | 8 | 18 | 3 | 0 | 24 | 35 | 10 | 24 | 19 | 29 | 21 | 3 |
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Accounts receivable, net of allowance for credit losses of $58 and $71 in 2023 and 2022, respectively | 11 | 13 | 14 | 17 | 17 | 17 | 17 | 17 | 19 | - | - | 24 | 23,029 |
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Inventories | 25 | 24 | 26 | 28 | 30 | 29 | 29 | 34 | 42 | 50 | 51 | 66 | 82 |
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Prepaid expenses and other current assets | 2 | 3 | 2 | 5 | 3 | 3 | 3 | 3 | 3 | 4 | 3 | 4 | 3,173 |
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Total current assets | 84 | 57 | 90 | 74 | 78 | 94 | 115 | 122 | 132 | 112 | 137 | 119 | 114,765 |
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Long-term investments | 10 | 28 | 10 | 22 | 10 | 10 | 9 | 21 | 32 | 46 | 19 | 9 | 8 |
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Property, plant and equipment | 115 | 124 | 131 | 142 | 151 | 160 | 167 | 182 | 201 | 219 | 233 | 271 | 286 |
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Less: accumulated depreciation | 59 | 65 | 72 | 80 | 87 | 95 | 101 | 107 | 116 | 124 | 135 | 147 | 161,098 |
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Property, plant and equipment net | 56 | 59 | 58 | 63 | 63 | 65 | 66 | 75 | 85 | 95 | 98 | 124 | 125,347 |
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Patents and licenses, net of accumulated amortization of $12,655 and $12,538 in 2022 and 2021, respectively | 1 | 1 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | - | - | 1 | - |
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Patents and licenses, net of accumulated amortization of $12,768 and $12,655 in 2023 and 2022, respectively | - | - | - | - | - | - | - | - | - | - | - | - | 1,072 |
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Goodwill | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 9,730 |
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Other | - | - | - | - | - | - | - | - | - | - | - | 2 | 1,746 |
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Other assets and deferred charges | - | - | - | - | - | - | - | - | - | - | - | 13 | 12,548 |
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Total assets | 162 | 156 | 172 | 172 | 164 | 183 | 204 | 231 | 262 | 267 | 267 | 265 | 260,825 |
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Accounts payable | 4 | 4 | 4 | 5 | 4 | 4 | 4 | 5 | 6 | 7 | 7 | 12 | 6,628 |
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Accrued liabilities | 6 | 3 | 4 | 5 | 5 | 5 | 5 | 5 | 5 | 7 | 6 | 6 | 6 |
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Accrued income and other taxes | - | - | - | - | - | - | - | - | - | 0 | 0 | 0 | 106 |
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Total current liabilities | 10 | 7 | 9 | 10 | 9 | 9 | 10 | 10 | 11 | 14 | 13 | 18 | 12,621 |
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Line of credit | - | - | - | - | - | - | - | - | - | - | - | - | - |
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Deferred income taxes | - | - | - | - | - | - | - | - | - | 11 | 7 | 4 | 2,371 |
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Other | - | - | - | - | - | - | - | - | - | - | - | 3 | 2,944 |
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Other liabilities and deferred credits | - | - | - | - | - | - | - | - | - | - | - | 7 | 5,315 |
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Total liabilities | 23 | 21 | 23 | 22 | 20 | 20 | 19 | 20 | 24 | 26 | 23 | 25 | 17,936 |
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Common stock, par value $0.10 per share, authorized 10,000 shares, issued 3,420 shares | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 342 |
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Additional paid-in capital | - | - | - | - | - | - | - | - | - | 54 | 61 | 66 | 67,331 |
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Retained earnings | 154 | 153 | 174 | 197 | 220 | 240 | 268 | 292 | 318 | 338 | 357 | 378 | 381,754 |
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Treasury shares, 1,660 shares in 2023 and 1,659 shares in 2022, at cost | 41 | 48 | 57 | 81 | 112 | 114 | 132 | 132 | -132 | - | - | 205 | 206,538 |
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Total stockholders' equity | 139 | 135 | 149 | 150 | 144 | 163 | 184 | 211 | 238 | 240 | 244 | 240 | 242,889 |
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Total liabilities and stockholders' equity | 162 | 156 | 172 | 172 | 164 | 183 | 204 | 231 | 262 | 267 | 267 | 265 | 260,825 |
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