| Dec 31, 2013 | Dec 31, 2014 | Dec 31, 2015 | Dec 31, 2016 | Dec 31, 2017 | Dec 31, 2018 | Dec 31, 2021 | Dec 31, 2022 | Dec 31, 2023 | Dec 31, 2024 |
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| Net income (loss) | -29 | -57 | -51 | -47 | -56 | -37 | -117 | -425 | 33 | 138 |
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| Depreciation | 1 | 3 | 5 | 5 | 6 | 9 | 14 | 17 | 20 | 25 |
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| Amortization | - | - | - | - | - | - | 5 | 6 | 6 | 6 |
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| Share based compensation expenses | 7 | 14 | 19 | 28 | 48 | 72 | 221 | 237 | 225 | 241 |
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| Amortization of Debt Issuance Costs and Discounts | - | - | - | - | - | 10 | 5 | 5 | 4 | 3 |
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| Changes in accrued interest and exchange rate on short-term and long-term deposits | - | -1 | 1 | 1 | 1 | 1 | 0 | 0 | 2 | -1 |
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| NonCashImpairmentRestructuringAndOtherCosts | - | - | - | - | - | - | - | - | 27 | - |
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| Amortization of premium and discount, accrued interest, and other gains (losses) on marketable debt securities, net | - | - | - | - | 0 | 0 | -8 | -6 | -8 | 13 |
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| Remeasurement loss (gain) on marketable equity securities and investments in privately held companies | - | - | - | - | - | - | 166 | -200 | 31 | 3 |
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| Changes in deferred income taxes, net | 0 | -0 | 0 | 0 | 3 | 1 | -54 | 58 | 9 | 5 |
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| Changes in operating lease right-of-use assets | - | - | - | - | - | - | -28 | -45 | -27 | -24 |
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| Changes in operating lease liabilities | - | - | - | - | - | - | -27 | -45 | -31 | -33 |
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| Foreign Currency Transaction Loss, before Tax | - | - | - | - | - | - | - | - | - | 4 |
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| Decease (increase) in trade receivables | -0 | 0 | 5 | 2 | 2 | 2 | 6 | 12 | 15 | -13 |
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| Increase in prepaid expenses and other current and long-term assets | 3 | 6 | 3 | 6 | 2 | 4 | 98 | 6 | 20 | 79 |
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| Increase (decrease) in trade payables | 2 | 1 | 7 | 8 | 12 | 11 | 27 | -19 | -52 | 12 |
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| Increase (Decrease) in Employee Related Liabilities | 3 | 8 | 2 | 3 | 6 | 3 | 19 | 3 | -30 | 87 |
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| Increase Decrease In Deferred Revenue Total | - | - | - | - | - | 55 | 82 | 55 | 76 | 74 |
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| Increase in accrued expenses and other current liabilities | 3 | 6 | 9 | -1 | 15 | -2 | 16 | 26 | 12 | 3 |
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| Net cash provided by operating activities | - | - | - | - | 83 | 116 | 66 | 37 | 248 | 497 |
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| Proceeds from Sale of Restricted Investments | 0 | 2 | 60 | 49 | 52 | 204 | 732 | 645 | 625 | 277 |
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| Investment in short-term and restricted deposits | 1 | 52 | 82 | 53 | 89 | 438 | 573 | 766 | 298 | 170 |
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| Investment in trading marketable debt securities | - | - | - | - | - | - | - | - | - | 267 |
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| Proceeds from available-for-sale marketable debt securities | - | - | - | - | - | - | - | - | - | 125 |
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| Purchase of property and equipment and lease prepayment | - | - | - | - | - | - | - | - | - | 18 |
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| Capitalization of internal use of software | - | - | - | - | 1 | 0 | 2 | 2 | 3 | 2 |
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| Proceeds from Sale of Equity Securities, FV-NI | - | - | - | - | - | - | 19 | 52 | 69 | 22 |
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| Investments in privately held companies | - | - | - | - | - | - | - | - | - | 3 |
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| Proceeds from (investment in) other assets | - | - | - | - | - | - | - | - | - | -1 |
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| Net cash provided by (used in) investing activities | - | - | - | - | -115 | -288 | 377 | -55 | 567 | -35 |
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| Repayment of convertible notes | - | - | - | - | - | - | - | - | 363 | - |
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| Purchase of treasury shares | - | - | - | - | - | - | 200 | 232 | 127 | 466 |
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| Proceeds from Stock Options Exercised | 1 | 1 | 7 | 22 | 24 | 33 | 40 | 43 | 40 | 60 |
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| Net cash used in financing activities | - | - | - | - | 24 | 418 | -160 | -189 | -450 | -407 |
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| Effect of exchange rate changes on cash and cash equivalents | - | - | - | - | - | - | - | - | - | -4 |
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| Increase (decrease) in cash and cash equivalents | - | - | - | - | - | - | - | - | 365 | 51 |
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| Income Taxes Paid | 1 | 1 | 2 | 3 | 4 | 4 | 7 | 11 | 12 | 11 |
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| Interest Received During Year | - | - | - | - | - | - | 20 | 24 | 48 | 36 |
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| Lease Obligation Incurred | - | - | - | - | - | - | 41 | 142 | 256 | 4 |
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| Non-cash purchase of property and equipment | - | - | - | - | - | - | 9 | 9 | 4 | 1 |
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