In millions, except per share items | Sep-30-17 | Jun-30-17 | Mar-31-17 | Dec-31-16 | Sep-30-16 | Jun-30-16 | Mar-31-16 | Dec-31-15 |
| 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K |
Cash Flows from Operating Activities | | | | | | | | |
Net loss | -1.6 | -2.2 | -5.9 | -4.0 | -4.2 | -4.3 | -4.8 | -6.3 |
|
Adjustments to reconcile net loss to net cash used in operating activities: | | | | | | | | |
Depreciation | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
Noncash stock-based compensation | 0.1 | 0.1 | 0.4 | 0.4 | 0.5 | 0.5 | 0.5 | 0.8 |
Change in fair value of warrant liability | -0.3 | 0.2 | | | | | | |
Increase in prepaid expenses and other current assets | 0.1 | 0.0 | -0.2 | 0.1 | 0.1 | 0.0 | -0.2 | 0.2 |
Increase (decrease) in accounts payable and accrued expenses | -0.3 | -0.1 | 1.1 | 0.4 | 0.0 | 0.2 | -0.8 | 0.4 |
Net cash used in operating activities | -2.0 | -2.0 | -4.6 | -3.1 | -3.6 | -3.5 | -5.3 | -4.8 |
|
Cash Flows from Investing Activities | | | | | | | | |
Capital expenditures | | | | | | | | |
Net cash used in investing activities | | | | | | | | |
|
Cash Flows from Financing Activities | | | | | | | | |
Issuance of common stock and warrants, net of offering costs | | 3.5 | | | 1.6 | | | |
Proceeds from exercise of stock warrants | | 0.0 | | | | | | |
Net cash provided by financing activities | | 2.5 | 1.0 | 1.3 | 1.6 | | | |
Net decrease in cash, cash equivalents and restricted cash | -2.0 | 0.5 | -3.6 | -1.8 | -2.0 | -3.5 | -5.3 | -4.8 |
|
Noncash transactions: | | | | | | | | |
Settlement of warrant liability due to cashless warrant exercises | -0.6 | | | | | | | |