| 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 |
| ASSETS | | | | | | | | |
| Current assets | | | | | | | | |
| Cash and cash equivalents | 1.8 | 3.8 | 3.2 | 8.7 | 10.5 | 12.5 | 16.0 | 21.4 |
| Restricted cash | 0.9 | 0.9 | 0.9 | | | | | |
| Prepaid expenses and other current assets | 0.1 | 0.3 | 0.3 | 0.1 | 0.2 | 0.3 | 0.3 | 0.1 |
| Total current assets | 2.9 | 5.0 | 4.5 | 8.8 | 10.7 | 12.8 | 16.3 | 21.5 |
| Fixed assets, net | | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Non-current restricted cash | 0.9 | 0.9 | 0.9 | | | | | |
| Total assets | 3.8 | 5.9 | 5.4 | 8.8 | 10.7 | 12.8 | 16.3 | 21.5 |
| |
| LIABILITIES AND STOCKHOLDERS' EQUITY | | | | | | | | |
| Current liabilities | | | | | | | | |
| Accounts payable | 1.2 | 1.5 | 1.7 | 1.9 | 1.8 | 1.6 | 1.6 | 2.0 |
| Accrued expenses | 1.2 | 1.3 | 1.2 | 0.8 | 0.5 | 0.7 | 0.5 | 0.9 |
| Total current liabilities | 2.4 | 2.7 | 2.8 | 2.7 | 2.3 | 2.3 | 2.1 | 2.9 |
| |
| Long-term liabilities | | | | | | | | |
| Accrued severance | 0.9 | 0.9 | 0.9 | | | | | |
| Warrant liability | 1.7 | 2.5 | | | | | | |
| Total liabilities | 5.1 | 6.2 | 3.8 | 2.7 | 2.3 | 2.3 | 2.1 | 2.9 |
| |
| Commitment & Contingencies (note 8) | | | | | | | | |
| Stockholders' Equity | | | | | | | | |
| Common Stock | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Additional paid-in capital | 329.3 | 328.7 | 328.4 | 327.0 | 325.3 | 323.2 | 322.7 | 322.2 |
| Cost of treasury stock, 112,350 shares | -1.4 | -1.4 | -1.4 | -1.4 | -1.4 | -1.4 | -1.4 | -1.4 |
| Accumulated deficit | -329.3 | -327.6 | -325.4 | -319.5 | -315.6 | -311.4 | -307.1 | -302.3 |
| Total stockholders' equity | -1.3 | -0.3 | 1.6 | 6.1 | 8.4 | 10.5 | 14.2 | 18.6 |
| Total liabilities and stockholders' equity | 3.8 | 5.9 | 5.4 | 8.8 | 10.7 | 12.8 | 16.3 | 21.5 |