| In millions, except per share items | Dec-31-16 | Dec-31-15 | Dec-31-14 | Dec-31-13 | Dec-31-12 | Dec-31-11 | Dec-31-10 | Dec-31-09 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| ASSETS | | | | | | | | |
| Current assets | | | | | | | | |
| Cash and cash equivalents | 8.7 | 21.4 | 46.6 | 75.8 | 24.2 | 4.6 | 3.0 | |
| Prepaid expenses and other current assets | 0.1 | 0.1 | 0.3 | 0.2 | 0.4 | 0.1 | 0.3 | |
| Total current assets | 8.8 | 21.5 | 46.9 | 76.0 | 24.6 | 4.7 | 3.3 | |
| Fixed assets, net | 0.0 | 0.0 | 0.0 | 0.1 | 0.1 | 0.0 | 0.0 | |
| Total assets | 8.8 | 21.5 | 46.9 | 76.1 | 26.8 | 6.1 | 4.5 | |
| |
| LIABILITIES AND STOCKHOLDERS' EQUITY | | | | | | | | |
| Current liabilities | | | | | | | | |
| Accounts payable | 1.9 | 2.0 | 2.1 | 3.0 | 3.2 | 1.1 | 1.2 | |
| Accrued expenses | 0.8 | 0.9 | 0.8 | 0.6 | 0.6 | 0.3 | 0.1 | |
| Total current liabilities | 2.7 | 2.9 | 2.9 | 3.6 | 3.8 | 1.4 | 1.3 | |
| |
| Long-term liabilities | | | | | | | | |
| Total liabilities | 2.7 | 2.9 | 2.9 | 3.6 | 3.8 | 1.4 | 1.3 | |
| |
| Commitment & Contingencies (note 8) | | | | | | | | |
| Stockholders' Equity | | | | | | | | |
| Common Stock | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Additional paid-in capital | 327.0 | 322.2 | 318.4 | 314.4 | 234.3 | 197.8 | 183.8 | |
| Cost of treasury stock, 112,350 shares | -1.4 | -1.4 | -1.4 | -1.4 | -1.4 | -1.4 | -1.4 | |
| Accumulated deficit | -319.5 | -302.3 | -273.1 | -240.5 | | | | |
| Total stockholders' equity | 6.1 | 18.6 | 44.0 | 72.5 | 23.0 | 4.7 | 3.2 | |
| Total liabilities and stockholders' equity | 8.8 | 21.5 | 46.9 | 76.1 | 26.8 | 6.1 | 4.5 | |