| 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 | Dec 31,
2023 |
|---|
| Cash and cash equivalents | 26 | 32 | 22 | 26 | 23 | 19 | 31 | 53 | 91 | 149 | 117 | 114 | 65 |
|---|
| Restricted Cash | - | - | - | - | - | - | - | - | 1 | 1 | 1 | 1 | 1 |
|---|
| Accounts receivable | 19 | 8 | 5 | 4 | 7 | 6 | 12 | 12 | 9 | 14 | 25 | 32 | 10 |
|---|
| Contract assets | - | - | - | - | - | - | - | - | - | 5 | 5 | 2 | 1 |
|---|
| Unbilled receivables | - | - | - | - | - | - | - | 2 | 10 | 11 | 9 | 7 | 9 |
|---|
| Total financial assets | - | - | - | - | - | - | - | - | - | 29 | 38 | 41 | 20 |
|---|
| Less: allowances | - | - | - | - | - | - | - | - | - | 0 | 0 | 0 | 0 |
|---|
| Total financial assets, net | - | - | - | - | - | - | - | - | - | 29 | 38 | 41 | 20 |
|---|
| Inventories | 4 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 2 | 3 |
|---|
| Prepaid expenses and other current assets | 2 | 5 | 2 | 1 | 1 | 1 | 1 | 1 | 3 | 3 | 6 | 5 | 5 |
|---|
| Total current assets | 79 | 60 | 36 | 33 | 33 | 27 | 45 | 68 | 114 | 184 | 162 | 163 | 93 |
|---|
| Restricted cash | - | - | - | - | - | - | - | - | 1 | 1 | 2 | 2 | 1 |
|---|
| Investments and Other Noncurrent Assets | - | - | - | - | - | - | - | - | - | 2 | 14 | 21 | - |
|---|
| Equity Securities without Readily Determinable Fair Value, Amount | - | - | - | - | - | - | - | - | - | - | - | - | 10 |
|---|
| Operating Lease, Right-of-Use Asset | - | - | - | - | - | - | - | - | 24 | 21 | 44 | 39 | 13 |
|---|
| Right-of-use assets - Finance leases, net | - | - | - | - | - | - | - | - | 0 | 0 | 0 | - | - |
|---|
| Property and equipment, net | 24 | 17 | 8 | 4 | 3 | 2 | 3 | 5 | 6 | 10 | 21 | 23 | 15 |
|---|
| Property and equipment, net | 24 | 17 | 8 | 4 | 3 | 2 | 3 | 5 | 6 | 10 | 21 | 23 | 15 |
|---|
| Goodwill | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 2 |
|---|
| Goodwill | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 2 |
|---|
| Other non-current assets | 1 | 2 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 |
|---|
| Other non-current assets | 1 | 2 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 |
|---|
| Total assets | 136 | 100 | 59 | 48 | 45 | 36 | 54 | 79 | 149 | 222 | 246 | 250 | 137 |
|---|
| Total assets | 136 | 100 | 59 | 48 | 45 | 36 | 54 | 79 | 149 | 222 | 246 | 250 | 137 |
|---|
| Accounts payable | 10 | 4 | 4 | 5 | 3 | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 6 |
|---|
| Accrued compensation | 7 | 3 | 4 | 3 | 3 | 4 | 5 | 5 | 5 | 7 | 11 | 11 | 11 |
|---|
| Other accrued liabilities | 7 | 7 | 2 | 3 | 2 | 2 | 4 | 5 | 7 | 10 | 13 | 15 | 5 |
|---|
| Operating Lease, Liability, Current | - | - | - | - | - | - | - | - | 1 | 3 | 4 | 5 | 10 |
|---|
| Deferred revenue | - | - | - | - | - | - | - | 5 | 0 | 2 | 3 | 14 | 4 |
|---|
| Total current liabilities | 28 | 16 | 11 | 14 | 15 | 12 | 25 | 18 | 15 | 25 | 33 | 49 | 36 |
|---|
| Deferred revenue, net of current portion | - | - | - | - | - | - | - | 3 | 2 | 3 | 4 | 17 | 1 |
|---|
| Operating Lease, Liability, Noncurrent | - | - | - | - | - | - | - | - | 25 | 22 | 44 | 38 | 12 |
|---|
| Other long-term liabilities | 3 | 4 | 5 | 4 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 |
|---|
| Total liabilities | - | - | - | - | - | 17 | 29 | 23 | 44 | 52 | 82 | 106 | 50 |
|---|
| Preferred Stock, Value, Issued | - | - | - | - | - | - | - | - | - | - | - | - | - |
|---|
| Common Stock, Value, Issued | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
|---|
| Additional paid-in capital | 288 | 294 | 298 | 302 | 306 | 311 | 340 | 387 | 448 | 537 | 552 | 566 | 584 |
|---|
| Accumulated deficit | -185 | -216 | -257 | -276 | -284 | -292 | -315 | -330 | -342 | -366 | -388 | -421 | -498 |
|---|
| Total stockholders’ equity | 103 | 78 | 41 | 26 | 23 | 19 | 25 | 56 | 106 | 170 | 164 | 145 | 87 |
|---|
| Total liabilities and stockholders’ equity | 136 | 100 | 59 | 48 | 45 | 36 | 54 | 79 | 149 | 222 | 246 | 250 | 137 |
|---|