| Dec 31,
2013 | Dec 31,
2014 | 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 income (loss) | -36 | -59 | -117 | -76 | -71 | -69 | -113 | -44 | -173 | 172 | -82 |
|---|
| Depreciation | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 |
|---|
| Amortization of debt issuance costs | 0 | 0 | 0 | - | - | - | - | - | - | 0 | 0 |
|---|
| Amortization of discount/premium on investments | -0 | -1 | -2 | -1 | 0 | 1 | 2 | 0 | -1 | 2 | 7 |
|---|
| Share-based compensation | 3 | 4 | 13 | 16 | 16 | 13 | 10 | 6 | 12 | 15 | 17 |
|---|
| Fair value of common stock issued related to asset acquisition | - | - | - | - | - | - | - | - | 43 | - | - |
|---|
| Note payable related to asset acquisition | - | - | - | - | - | - | - | - | 14 | - | - |
|---|
| Gain on sale of TEMBEXA | - | - | - | - | - | - | - | - | - | 230 | - |
|---|
| Gain on sale of equipment | - | - | - | - | - | - | - | - | - | - | 0 |
|---|
| Gain on sale of investments | - | - | - | - | - | -0 | -0 | 0 | 0 | 0 | - |
|---|
| Lease-related amortization | - | - | - | - | - | - | - | - | 0 | 0 | -0 |
|---|
| Accounts receivable | -1 | -0 | 2 | -1 | 0 | -1 | 1 | -1 | -0 | 1 | -1 |
|---|
| Inventories | - | - | - | - | - | - | - | - | 3 | 2 | - |
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| Prepaid expenses and other assets | 2 | 0 | 3 | -3 | 0 | -1 | 1 | -1 | 2 | 5 | -3 |
|---|
| Accounts payable and accrued liabilities | 2 | 6 | 8 | -10 | 3 | 0 | -4 | -0 | 7 | 6 | -2 |
|---|
| Net cash used in operating activities | -26 | -47 | -100 | -64 | -50 | -54 | -75 | -36 | -100 | -47 | -69 |
|---|
| Net cash used in operating activities | -26 | -47 | -100 | -64 | -50 | -54 | -75 | -36 | -100 | -47 | -69 |
|---|
| Purchases of property and equipment | 0 | 1 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
|---|
| Purchases of short-term investments | 2 | 155 | 60 | 24 | - | 126 | 168 | 74 | 105 | 183 | 90 |
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| Purchases of long-term investments | - | 55 | 235 | 79 | 163 | 6 | - | - | 10 | 58 | 39 |
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| Proceeds from Sale of Short-Term Investments | 1 | 3 | 1 | - | 14 | 111 | 13 | 17 | 4 | 8 | - |
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| Proceeds from maturities of short-term investments | 11 | 49 | 127 | 198 | 166 | 126 | 165 | 121 | 67 | 69 | 199 |
|---|
| Proceeds from sale of TEMBEXA | - | - | - | - | - | - | - | - | - | 234 | - |
|---|
| Proceeds from sale of property and equipment | - | - | - | - | - | - | - | 0 | - | - | 0 |
|---|
| Net cash provided by (used in) investing activities | 9 | -160 | -169 | 94 | 16 | 105 | 11 | 65 | -44 | 70 | 71 |
|---|
| Proceeds from Stock Options Exercised | 2 | 5 | 2 | 0 | 0 | 0 | 0 | 1 | 4 | 1 | - |
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| Proceeds from employee stock purchase plan | - | 0 | 1 | 0 | 1 | 1 | 0 | 0 | 1 | 1 | 0 |
|---|
| Proceeds from Issuance of Common Stock | - | - | 162 | - | - | 11 | - | - | 108 | - | - |
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| Payments of deferred offering costs | - | - | - | - | 0 | 0 | 0 | - | - | 0 | - |
|---|
| Payments of debt issuance costs | - | - | - | - | - | - | - | - | - | - | 0 |
|---|
| Payment of note payable | - | - | - | - | - | - | - | - | - | -14 | - |
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| Net cash provided by (used in) financing activities | 106 | 225 | 161 | 1 | 1 | 11 | 0 | 1 | 112 | -13 | 0 |
|---|
| Net increase (decrease) in cash and cash equivalents | - | - | - | - | - | - | -64 | 30 | -32 | 10 | 2 |
|---|
| Non-cash purchases of property and equipment | - | - | - | - | - | - | - | 0 | - | - | - |
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