| 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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Net income | 26 | 24 | 27 | 28 | 29 | 28 | 37 | 34 | 37 | 32 | 33 | 35 | 19 |
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Depreciation and amortization | 7 | 8 | 9 | 9 | 9 | 9 | 9 | 9 | 11 | 12 | 13 | 14 | 15,098 |
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Deferred income taxes | - | - | - | - | - | - | - | - | - | - | - | 3 | - |
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Deferred income taxes | 3 | 1 | -1 | 0 | -1 | -0 | -1 | -1 | 2 | - | - | - | -1,517 |
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Stock-based compensation | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 1,531 |
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Net change in unrealized gains and losses on investments | - | - | - | - | - | - | - | - | 0 | -1 | -1 | -0 | 900 |
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Net change in accrued interest, premiums, and discounts on investments | - | - | - | - | - | - | - | - | - | - | - | -0 | -118 |
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Other | - | - | - | - | - | - | - | - | - | 0 | 0 | - | - |
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Adjustments to reconcile net income to net cash provided by operating activities: | - | - | - | - | - | - | - | - | 51 | 47 | 44 | 48 | 35,305 |
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Accounts receivable | -0 | 2 | 1 | 3 | -0 | 1 | -0 | -0 | 2 | 2 | -5 | 3 | 922 |
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Inventories | 7 | -1 | 2 | 2 | 2 | -1 | 0 | 4 | 9 | -8 | -0 | 15 | -16,514 |
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Prepaid expenses and other current assets | 1 | 1 | -2 | 3 | -2 | 0 | 0 | 0 | 1 | - | - | 1 | 347 |
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Other non-current assets | -0 | 0 | 0 | 0 | 0 | 1 | -0 | 0 | 0 | -0 | 0 | -1 | 480 |
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Accounts payable and accrued liabilities | 2 | -2 | 2 | 1 | -0 | -0 | 0 | 1 | 1 | 2 | -1 | -1 | -326 |
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Accrued income and other taxes | 0 | -0 | 0 | -0 | -0 | 0 | 0 | -0 | -0 | -0 | -0 | -0 | 32 |
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Other non-current liabilities | 0 | -1 | 0 | -1 | 0 | 0 | 1 | 1 | 1 | - | - | 1 | -240 |
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Cash flows from operating activities | 31 | 29 | 37 | 31 | 40 | 37 | 47 | 43 | 42 | 39 | 39 | 29 | 20,006 |
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Property, plant and equipment additions | 12 | 10 | 8 | 13 | 9 | 11 | 10 | 18 | 20 | - | - | 34 | 22,319 |
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Purchase of investments | 15 | 27 | - | 33 | 0 | 31 | 69 | 28 | 84 | - | - | 36 | 5,648 |
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Proceeds from sale of investments | - | - | - | - | - | - | - | - | - | - | - | 0 | 1,683 |
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Proceeds from maturities of investments | 14 | 20 | 8 | 36 | 13 | 5 | 58 | 41 | 59 | 36 | 40 | 54 | 22,147 |
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Cash flows from investing activities | -12 | -17 | -2 | -10 | 4 | -36 | -21 | -5 | -45 | -31 | 2 | -15 | -4,137 |
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Shares tendered for employees' withholding taxes on stock-based compensation | 0 | 1 | - | 0 | 0 | 1 | 8 | 0 | 1 | - | - | 1 | 57 |
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Purchase of treasury stock | - | - | - | - | - | - | - | - | - | - | - | 26 | - |
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Purchase of treasury stock | 2 | 5 | 9 | 24 | 31 | 1 | - | - | - | - | - | - | 1,667 |
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Dividends paid | - | - | - | - | - | - | - | - | - | - | - | -15 | - |
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Dividends paid | 4 | 24 | 5 | 5 | 6 | 7 | 8 | 9 | 11 | - | - | - | 15,311 |
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Proceeds from draw on line of credit | - | - | - | - | - | - | - | - | - | - | - | 1 | 25,607 |
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Repayment of draw on line of credit | - | - | - | - | - | - | - | - | - | - | - | 1 | 25,607 |
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Cash flows from financing activities | -5 | -29 | -14 | -29 | -37 | -9 | -16 | -10 | -11 | -31 | -31 | -41 | -17,035 |
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Net change in cash and cash equivalents | - | - | - | - | - | - | - | - | - | - | - | -28 | -1,166 |
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Income taxes, net of refunds | - | - | - | - | - | - | - | - | - | - | - | 10 | 3,536 |
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Non-cash effect of stock option exercises | - | - | - | - | - | - | - | - | - | - | 6 | 4 | - |
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