| Quarterly Financial Information [Text Block] |
| | Selected Quarterly Financial Data (Unaudited) | Quarterly financial information for fiscal 2016 and 2015 are presented in the following table, in thousands, except per share data. Certain revenue and expense amounts in the years ended December 31, 2016 and 2015 have been reclassified to discontinued operations.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Tc99m tilmanocept sales revenue
| | $ | 9 | | | $ | 4 | | | $ | 18 | | | $ | 9 | | Tc99m tilmanocept license revenue
| | | 254 | | | | 246 | | | | 1,296 | | | | — | | | Grant and other revenue | | | 686 | | | | 917 | | | | 511 | | | | 1,022 | | | Gross profit | | | 947 | | | | 1,166 | | | | 1,821 | | | | 975 | | | Operating expenses | | | 4,705 | | | | 3,407 | | | | 2,731 | | | | 4,215 | | | Loss from operations | | | (3,758 | ) | | | (2,241 | ) | | | (910 | ) | | | (3,240 | ) | | Loss from continuing operations | | | (2,682 | ) | | | (817 | ) | | | (1,761 | ) | | | (2,118 | ) | Gain (l oss) from discontinued operations, net of tax
| | | (1,004 | ) | | | (5,865 | ) | | | 1,702 | | | | (1,764 | ) | | Net loss attributable to common stockholders | | | (3,686 | ) | | | (6,681 | ) | | | (59 | ) | | | (3,882 | ) | Loss per common share (basic and diluted)
| | | | | | | | | | | | | | | | | | Continuing operations | | $ | (0.02 | ) | | $ | 0.00 | | | $ | (0.01 | ) | | $ | (0.01 | ) | | Discontinued operations | | $ | 0.00 | | | $ | (0.04 | ) | | $ | 0.01 | | | $ | (0.01 | ) | | Attributable to common stockholders | | $ | (0.02 | ) | | $ | (0.04 | ) | | $ | (0.00 | ) | | $ | (0.02 | ) | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Tc99m tilmanocept sales revenue
| | $ | 4 | | | $ | — | | | $ | 9 | | | $ | 6 | | Tc99m tilmanocept license revenue
| | | 83 | | | | 250 | | | | 550 | | | | 250 | | | Grant and other revenue | | | 190 | | | | 654 | | | | 477 | | | | 540 | | | Gross profit | | | 276 | | | | 904 | | | | 1,034 | | | | 796 | | | Operating expenses | | | 6,900 | | | | 4,348 | | | | 5,947 | | | | 4,256 | | | Loss from operations | | | (6,623 | ) | | | (3,443 | ) | | | (4,912 | ) | | | (3,463 | ) | | Loss from continuing operations | | | (5,983 | ) | | | (8,171 | ) | | | (6,509 | ) | | | (1,946 | ) | | Loss from discontinued operations, net of tax | | | (1,309 | ) | | | (1,520 | ) | | | (1,562 | ) | | | (564 | ) | | Net loss attributable to common stockholders | | | (7,337 | ) | | | (9,691 | ) | | | (8,071 | ) | | | (2,510 | ) | Loss per common share (basic and diluted)
| | | | | | | | | | | | | | | | | | Continuing operations | | $ | (0.04 | ) | | $ | (0.05 | ) | | $ | (0.04 | ) | | $ | (0.02 | ) | | Discontinued operations | | $ | (0.01 | ) | | $ | (0.01 | ) | | $ | (0.01 | ) | | $ | 0.00 | | | Attributable to common stockholders | | $ | (0.05 | ) | | $ | (0.06 | ) | | $ | (0.05 | ) | | $ | (0.02 | ) | | | | Net loss per share is computed independently for each of the quarters presented. Therefore the sum of the quarterly per-share calculations will not necessarily equal the annual per share calculation. |
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