| Dec 31,
2018 | Dec 31,
2019 | Dec 31,
2020 | Dec 31,
2021 | Dec 31,
2022 | Dec 31,
2023 |
|---|
| Cash | - | - | - | 17 | 15 | - |
|---|
| Cash and cash equivalents | 7 | 2 | 10 | - | - | 16 |
|---|
| Accounts receivable and unbilled revenues, net | 2 | 1 | 2 | 1 | 1 | 1 |
|---|
| Inventory | 1 | 1 | 1 | 3 | 4 | 1 |
|---|
| Prepaid expenses and other current assets | 1 | 1 | 1 | 1 | 1 | 1 |
|---|
| Total current assets | 10 | 5 | 15 | 22 | 21 | 19 |
|---|
| Property and equipment, net | 2 | 2 | 1 | 0 | 0 | 0 |
|---|
| Operating lease right-of-use assets, net | - | 0 | 1 | 1 | 0 | 0 |
|---|
| Total assets | 13 | 7 | 17 | 23 | 21 | 19 |
|---|
| Total assets | 13 | 7 | 17 | 23 | 21 | 19 |
|---|
| Cash | - | - | - | 17 | 15 | - |
|---|
| Cash and cash equivalents | 7 | 2 | 10 | - | - | 16 |
|---|
| Accounts receivable and unbilled revenues, net | 2 | 1 | 2 | 1 | 1 | 1 |
|---|
| Inventory | 1 | 1 | 1 | 3 | 4 | 1 |
|---|
| Prepaid expenses and other current assets | 1 | 1 | 1 | 1 | 1 | 1 |
|---|
| Total current assets | 10 | 5 | 15 | 22 | 21 | 19 |
|---|
| Property and equipment, net | 2 | 2 | 1 | 0 | 0 | 0 |
|---|
| Operating lease right-of-use assets, net | - | 0 | 1 | 1 | 0 | 0 |
|---|
| Total assets | 13 | 7 | 17 | 23 | 21 | 19 |
|---|
| Total assets | 13 | 7 | 17 | 23 | 21 | 19 |
|---|
| Property and equipment, net | 2 | 2 | 1 | 0 | 0 | 0 |
|---|
| Operating lease right-of-use assets, net | - | 0 | 1 | 1 | 0 | 0 |
|---|
| Total assets | 13 | 7 | 17 | 23 | 21 | 19 |
|---|
| Accounts payable | 1 | 1 | 1 | 1 | 0 | 0 |
|---|
| Accrued payroll and employee benefits | 1 | 1 | 1 | 1 | 1 | 1 |
|---|
| Accrued expenses | 0 | 1 | 1 | 0 | 0 | 0 |
|---|
| Contract liabilities | - | - | - | - | 0 | 0 |
|---|
| Current portion of finance lease obligations | - | 1 | 1 | 0 | 0 | 0 |
|---|
| Current portion of operating lease obligations | - | 0 | 1 | 0 | 0 | 0 |
|---|
| Total current liabilities | 2 | 3 | 4 | 3 | 2 | 2 |
|---|
| Finance lease obligations, net of current portion | - | 1 | 0 | 0 | 0 | 0 |
|---|
| Operating lease obligations, net of current portion | - | - | - | - | 0 | - |
|---|
| Total liabilities | 3 | 4 | 5 | 3 | 2 | 2 |
|---|
| Total liabilities | 3 | 4 | 5 | 3 | 2 | 2 |
|---|
| Accounts payable | 1 | 1 | 1 | 1 | 0 | 0 |
|---|
| Accrued payroll and employee benefits | 1 | 1 | 1 | 1 | 1 | 1 |
|---|
| Accrued expenses | 0 | 1 | 1 | 0 | 0 | 0 |
|---|
| Contract liabilities | - | - | - | - | 0 | 0 |
|---|
| Current portion of finance lease obligations | - | 1 | 1 | 0 | 0 | 0 |
|---|
| Current portion of operating lease obligations | - | 0 | 1 | 0 | 0 | 0 |
|---|
| Total current liabilities | 2 | 3 | 4 | 3 | 2 | 2 |
|---|
| Finance lease obligations, net of current portion | - | 1 | 0 | 0 | 0 | 0 |
|---|
| Operating lease obligations, net of current portion | - | - | - | - | 0 | - |
|---|
| Total liabilities | 3 | 4 | 5 | 3 | 2 | 2 |
|---|
| Total liabilities | 3 | 4 | 5 | 3 | 2 | 2 |
|---|
| Finance lease obligations, net of current portion | - | 1 | 0 | 0 | 0 | 0 |
|---|
| Operating lease obligations, net of current portion | - | - | - | - | 0 | - |
|---|
| Total liabilities | 3 | 4 | 5 | 3 | 2 | 2 |
|---|
| Common stock, 25,000,000 shares authorized, with par value of $0.001; 15,359,481 and 14,455,765 shares issued and outstanding at December 31, 2023 and 2022, respectively | 0 | 0 | 0 | 0 | 0 | 0 |
|---|
| Additional paid-in capital | 198 | 198 | 212 | 227 | 227 | - |
|---|
| Additional paid-in capital | - | - | - | - | - | 235 |
|---|
| Accumulated other comprehensive loss | - | -1 | -0 | -0 | -0 | -0 |
|---|
| Accumulated deficit | -185 | -191 | -196 | -203 | -207 | -218 |
|---|
| Total stockholders’ equity | 12 | 6 | 15 | 24 | 19 | 17 |
|---|
| Noncontrolling interests | -2 | -3 | -3 | -4 | - | - |
|---|
| Total stockholders’ equity | 10 | 4 | 12 | 20 | 19 | - |
|---|
| Total liabilities and stockholders’ equity | 13 | 7 | 17 | 23 | 21 | 19 |
|---|
| Common stock, 25,000,000 shares authorized, with par value of $0.001; 15,359,481 and 14,455,765 shares issued and outstanding at December 31, 2023 and 2022, respectively | 0 | 0 | 0 | 0 | 0 | 0 |
|---|
| Additional paid-in capital | 198 | 198 | 212 | 227 | 227 | - |
|---|
| Additional paid-in capital | - | - | - | - | - | 235 |
|---|
| Accumulated other comprehensive loss | - | -1 | -0 | -0 | -0 | -0 |
|---|
| Accumulated deficit | -185 | -191 | -196 | -203 | -207 | -218 |
|---|
| Total stockholders’ equity | 12 | 6 | 15 | 24 | 19 | 17 |
|---|
| Noncontrolling interests | -2 | -3 | -3 | -4 | - | - |
|---|
| Total stockholders’ equity | 10 | 4 | 12 | 20 | 19 | - |
|---|
| Total liabilities and stockholders’ equity | 13 | 7 | 17 | 23 | 21 | 19 |
|---|