| Dec 31,
2011 | Dec 31,
2012 | 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 |
|---|
| Net loss | - | - | - | - | - | - | - | -58 | -71 | -60 | -54 | -43 |
|---|
| Depreciation and amortization | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 1 | 2 | 3 | 3 | 3 |
|---|
| Stock-based compensation | 2 | 3 | 3 | 5 | 7 | 8 | 9 | 10 | 13 | 18 | 24 | 24 |
|---|
| Non-cash operating lease cost | - | - | - | - | - | - | - | - | 2 | -1 | -1 | -2 |
|---|
| Private Company Investment Impairment Loss | - | - | - | - | - | - | - | - | - | - | - | 2 |
|---|
| Net loss (gain) on sale of available-for-sale securities | - | - | - | - | - | 1 | 3 | - | - | -0 | 0 | -0 |
|---|
| Unrealized gain on investments | - | - | - | - | - | - | - | - | - | - | 0 | 1 |
|---|
| Impairment of long-lived assets | - | - | - | - | - | - | - | - | - | 0 | 0 | - |
|---|
| Non-cash interest expense | - | - | - | - | - | 1 | 1 | 1 | 0 | 0 | 1 | 1 |
|---|
| Foreign currency remeasurement loss (gain) | - | - | - | - | - | - | - | - | - | - | -1 | -2 |
|---|
| Accounts receivable | 1 | -2 | 2 | -1 | 0 | 1 | 6 | -4 | 8 | 4 | 4 | 9 |
|---|
| Inventories | 0 | 4 | 2 | -3 | -4 | 2 | 2 | -1 | 6 | 4 | 20 | 2 |
|---|
| Prepaid and other assets | - | - | - | - | - | - | - | - | - | - | - | -1 |
|---|
| Accounts payable | - | 3 | -2 | -1 | -4 | 3 | 2 | 6 | 5 | 2 | 12 | -5 |
|---|
| Accrued liabilities and other non-current liabilities | - | - | - | - | - | - | -1 | 6 | 1 | 3 | -1 | -1 |
|---|
| Deferred product revenue | - | - | - | - | - | - | - | 0 | 0 | 0 | 0 | -0 |
|---|
| Net cash used in operating activities | -16 | -14 | -27 | - | - | - | - | -31 | -66 | -41 | -34 | -26 |
|---|
| Capital expenditures | 0 | 0 | - | 2 | 1 | 1 | 0 | 1 | 9 | 2 | 1 | 2 |
|---|
| Purchases of investments | - | - | 30 | 26 | 90 | 83 | 69 | 81 | 44 | 99 | 52 | 30 |
|---|
| Proceeds from maturities and sale of investments | 1 | 0 | 2 | 25 | 93 | 63 | 70 | 38 | 81 | 51 | 66 | 40 |
|---|
| Net cash provided by (used in) investing activities | 1 | 0 | -29 | - | - | - | - | -44 | 28 | -50 | 13 | 8 |
|---|
| Net proceeds from equity incentives | - | - | - | - | - | - | - | - | 3 | 12 | 9 | 4 |
|---|
| Proceeds from Issuance of Common Stock | 9 | 14 | 61 | 18 | 75 | 22 | 30 | 85 | 27 | 77 | 3 | -0 |
|---|
| Proceeds from Lines of Credit | - | 2 | 3 | - | - | - | - | - | 5 | 3 | 6 | 0 |
|---|
| Proceeds from loans | - | - | - | 10 | 10 | - | 30 | - | 39 | - | 15 | - |
|---|
| Proceeds from Noncontrolling Interests | - | - | - | - | - | - | - | - | - | - | 1 | - |
|---|
| Net cash provided by financing activities | 12 | 15 | 59 | - | - | - | - | 93 | 43 | 92 | 34 | 4 |
|---|
| Effect of exchange rates on cash, cash equivalents, and restricted cash | - | - | - | - | - | - | - | - | - | - | -1 | -1 |
|---|
| Net (decrease) increase in cash, cash equivalents and restricted cash | - | - | - | - | - | - | - | 18 | 6 | 1 | 12 | -14 |
|---|
| Cash paid for interest | - | - | - | - | - | - | - | 3 | 3 | 3 | 4 | 5 |
|---|
| Income Taxes Paid | - | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
|---|