| 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 and comprehensive loss | -17 | -20 | -23 | -19 | -24 | -26 | -34 | -26 | -30 | -38 | -31 | -25 |
|---|
| Depreciation | - | - | - | - | - | - | - | - | - | - | 0 | 1 |
|---|
| Amortization of debt discount and issuance costs | 2 | 3 | 1 | 1 | 2 | 4 | - | - | 4 | 0 | 3 | 2 |
|---|
| Amortization of right-of-use asset | - | - | - | - | - | - | - | - | - | - | 0 | 0 |
|---|
| Interest expense added to loan principal | - | - | - | - | - | 8 | 9 | 10 | 10 | 7 | 4 | - |
|---|
| Interest expense added to lease liability | - | - | - | - | - | 1 | 1 | 1 | 1 | 1 | 2 | 2 |
|---|
| Loss on equity method investments | - | - | - | - | - | - | - | - | - | -2 | -1 | 0 |
|---|
| Loss on debt conversion and extinguishment of debt | - | - | - | - | - | - | - | - | - | -12 | -1 | - |
|---|
| Compensation charge for stock and share option awards | 2 | 0 | 1 | 1 | 1 | 1 | 2 | 0 | 1 | 2 | 5 | 2 |
|---|
| Unrealized gain on warrant derivative liabilities | - | - | - | - | - | - | - | -2 | - | -0 | -1 | - |
|---|
| Accounts receivable | 0 | 0 | 0 | -0 | -0 | -0 | -0 | 0 | 0 | 0 | 0 | 0 |
|---|
| Prepaid expenses and other current assets | -0 | -0 | -0 | -0 | -0 | 3 | -3 | -0 | -0 | 0 | 0 | -0 |
|---|
| Other assets | 0 | 0 | 3 | 0 | 0 | 0 | 0 | -0 | 0 | 1 | -0 | 1 |
|---|
| Accounts payable | 0 | 0 | 0 | -1 | 0 | 0 | -0 | -0 | -0 | 0 | -0 | 0 |
|---|
| Accrued and other liabilities | 0 | 0 | 0 | -0 | 0 | 2 | -2 | -0 | -1 | -2 | 0 | 0 |
|---|
| Net cash used in operating activities | -8 | -11 | -16 | -10 | -13 | -10 | -10 | -12 | -14 | -13 | -15 | -19 |
|---|
| Additions to property, plant and equipment and water programs | 4 | 3 | 0 | 0 | 1 | - | 1 | 2 | 2 | 6 | 23 | 3 |
|---|
| Contributions to equity-method investments | - | - | - | - | - | - | - | - | 1 | 3 | 1 | 0 |
|---|
| Distributions from equity-method investments | - | - | - | - | - | - | - | - | - | - | - | 0 |
|---|
| Payments for acquisitions, net of cash acquired | - | - | - | - | - | - | - | 2 | - | 1 | - | 1 |
|---|
| Net cash used in investing activities | -4 | -3 | -0 | -0 | -1 | - | -1 | -4 | -3 | -10 | -23 | -4 |
|---|
| Net proceeds from issuance of common stock | 15 | - | - | 15 | - | 11 | - | 16 | 19 | 15 | 32 | 22 |
|---|
| Net proceeds from the issuance of 8.875% series A cumulative, perpetual preferred stock | - | - | - | - | - | - | - | - | - | - | 54 | - |
|---|
| Dividend payment | - | - | - | - | - | - | - | - | - | - | 1 | 6,555,000 |
|---|
| Proceeds from the issuance of long-term debt | - | - | - | - | - | - | - | - | - | 0 | 50 | 0 |
|---|
| Issuance costs of long-term debt | - | - | 1 | - | - | 1 | - | - | - | - | 3 | - |
|---|
| Principal payments on long-term debt | 0 | 0 | 0 | 0 | 0 | 11 | 45 | 0 | 0 | 0 | 78 | 0 |
|---|
| Costs for extinguishment of debt | - | - | - | - | - | - | - | - | - | - | 3 | - |
|---|
| Taxes paid related to net share settlement of equity awards | - | - | - | - | - | - | - | - | - | - | 1 | - |
|---|
| Other | - | - | - | - | - | - | - | - | - | - | 0 | - |
|---|
| Net cash provided by financing activities | 17 | 5 | 26 | 15 | -0 | 19 | 12 | 15 | 19 | 15 | 51 | 17 |
|---|
| Net (decrease) increase in cash, cash equivalents and restricted cash | - | - | - | - | - | - | - | -0 | 3 | -8 | 12 | -6 |
|---|