Schedule of Segment Reporting Information, by Segment [Table Text Block] |
Year Ended December 31, 2017 | | | | | | | | | | | | | Tc99m tilmanocept sales revenue: | | | | | | | | | | | | | | | | | United States | | $ | — | | | $ | — | | | $ | — | | | $ | — | | International | | | — | | | | — | | | | — | | | | — | | Tc99m tilmanocept license revenue | | | 100,000 | | | | — | | | | — | | | | 100,000 | | Tc99m tilmanocept royalty revenue | | | 9,126 | | | | — | | | | — | | | | 9,126 | | Grant and other revenue | | | 1,506,232 | | | | 195,079 | | | | — | | | | 1,701,311 | | Total revenue | | | 1,615,358 | | | | 195,079 | | | | — | | | | 1,810,437 | | Cost of goods sold | | | 3,651 | | | | — | | | | — | | | | 3,651 | | Research and development expenses, excluding depreciation and amortization | | | 3,784,255 | | | | 729,587 | | | | — | | | | 4,513,842 | | Selling, general and administrative expenses, excluding depreciation and amortization
| | | — | | | | 34,484 | | | | 10,895,301 | | | | 10,929,785 | | Depreciation and amortization
| | | — | | | | — | | | | 240,166 | | | | 240,166 | | | | | (2,172,548 | ) | | | (568,992 | ) | | | (11,135,467 | ) | | | (13,877,007 | ) | | | | — | | | | — | | | | (3,912,679 | ) | | | (3,912,679 | ) | Benefit from income taxes | | | 496,127 | | | | 129,936 | | | | 3,436,426 | | | | 4,062,489 | | L oss from continuing operations
| | | (1,676,421 | ) | | | (439,056 | ) | | | (11,611,720 | ) | | | (13,727,197 | ) | Income from discontinued operations, net of tax effect
| | | 88,673,053 | | | | — | | | | — | | | | 88,673,053 | | Net income (loss) | | | 86,996,632 | | | | (439,056 | ) | | | (11,611,720 | ) | | | 74,945,856 | | Total assets, net of depreciation and amortization: | | | | | | | | | | | | | | | | | United States | | $ | 13,065,871 | | | $ | 49,001 | | | $ | 7,634,237 | | | $ | 20,749,109 | | International | | | 30,476 | | | | — | | | | 1,851 | | | | 32,327 | | Capital expenditures | | | — | | | | — | | | | 33,690 | | | | 33,690 | |
Year Ended December 31, 2016 | | | | | | | | | | | | | Tc99m tilmanocept sales revenue: | | | | | | | | | | | | | | | | | United States | | $ | — | | | $ | — | | | $ | — | | | $ | — | | International | | | 39,601 | | | | — | | | | — | | | | 39,601 | | Tc99m tilmanocept license revenue | | | 1,795,625 | | | | — | | | | — | | | | 1,795,625 | | Grant and other revenue | | | 3,011,642 | | | | 124,766 | | | | — | | | | 3,136,408 | | Total revenue | | | 4,846,868 | | | | 124,766 | | | | — | | | | 4,971,634 | | Cost of goods sold, excluding depreciation and amortization | | | 62,260 | | | | — | | | | — | | | | 62,260 | | Research and development expenses, excluding depreciation and amortization | | | 6,375,929 | | | | 762,151 | | | | — | | | | 7,138,080 | | Selling, general and administrative expenses, excluding depreciation and amortization
| | | — | | | | 63,158 | | | | 7,403,329 | | | | 7,466,487 | | Depreciation and amortization
| | | 56,317 | | | | — | | | | 397,232 | | | | 453,549 | | | | | (1,647,638 | ) | | | (700,543 | ) | | | (7,800,561 | ) | | | (10,148,742 | ) | Other income (expense), excluding equity in the loss of R-NAV, LLC
| | | — | | | | — | | | | 2,786,007 | | | | 2,786,007 | | Equity in the loss of R-NAV, LLC | | | — | | | | — | | | | (15,159 | ) | | | (15,159 | ) | L oss from continuing operations
| | | (1,647,638 | ) | | | (700,543 | ) | | | (5,029,713 | ) | | | (7,377,894 | ) | Loss from discontinued operations, net of tax effect | | | (6,931,137 | ) | | | — | | | | — | | | | (6,931,137 | ) | Net loss | | | (8,578,775 | ) | | | (700,543 | ) | | | (5,029,713 | ) | | | (14,309,031 | ) | Total assets, net of depreciation and amortization: | | | | | | | | | | | | | | | | | United States | | $ | 3,815,271 | | | $ | 15,075 | | | $ | 8,498,797 | | | $ | 12,329,143 | | International | | | 131,752 | | | | — | | | | 781 | | | | 132,533 | | Capital expenditures | | | — | | | | — | | | | 1,847 | | | | 1,847 | |
Year Ended December 31, 2015 | | | | | | | | | | | | | Tc99m tilmanocept sales revenue: | | | | | | | | | | | | | | | | | United States | | $ | — | | | $ | — | | | $ | — | | | $ | — | | International | | | 19,075 | | | | — | | | | — | | | | 19,075 | | Tc99m tilmanocept license revenue | | | 1,133,333 | | | | — | | | | — | | | | 1,133,333 | | Grant and other revenue | | | 1,860,953 | | | | — | | | | — | | | | 1,860,953 | | Total revenue | | | 3,013,361 | | | | — | | | | — | | | | 3,013,361 | | Cost of goods sold, excluding depreciation and amortization | | | 3,226 | | | | — | | | | — | | | | 3,226 | | Research and development expenses, excluding depreciation and amortization | | | 9,831,834 | | | | 730,895 | | | | — | | | | 10,562,729 | | Selling, general and administrative expenses, excluding depreciation and amortization
| | | — | | | | 123,884 | | | | 10,242,066 | | | | 10,365,950 | | Depreciation and amortization
| | | 232,091 | | | | — | | | | 290,105 | | | | 522,196 | | | | | (7,053,790 | ) | | | (854,779 | ) | | | (10,532,171 | ) | | | (18,440,740 | ) | Other income (expense), excluding equity in the loss of R-NAV, LLC
| | | — | | | | — | | | | (4,298,604 | ) | | | (4,298,604 | ) | Equity in the loss of R-NAV, LLC | | | — | | | | — | | | | (305,253 | ) | | | (305,253 | ) | L oss from continuing operations
| | | (7,053,790 | ) | | | (854,779 | ) | | | (15,136,028 | ) | | | (23,044,597 | ) | Income (loss) from discontinued operations,
| | | (5,713,598 | ) | | | — | | | | 1,194,660 | | | | (4,518,938 | ) | Net loss | | | (12,767,388 | ) | | | (854,779 | ) | | | (13,941,368 | ) | | | (27,563,535 | ) | Total assets, net of depreciation and amortization: | | | | | | | | | | | | | | | | | United States | | $ | 4,161,029 | | | $ | — | | | $ | 10,391,805 | | | $ | 14,552,834 | | International | | | 410,666 | | | | — | | | | 1,013 | | | | 411,679 | | Capital expenditures | | | 26,589 | | | | — | | | | 12,412 | | | | 39,001 | |
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