| In millions, except per share items | Dec-31-22 | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 | Dec-31-15 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Current Assets | | | | | | | | |
| Cash and cash equivalents | 10.9 | 20.6 | 19.4 | 17.0 | 13.4 | 10.1 | 21.7 | 5.9 |
| Accounts receivable | 0.1 | 0.0 | 0.0 | | | | | |
| Prepaid expenses | 0.8 | 0.6 | 0.3 | 0.3 | 0.2 | 0.2 | 0.2 | 0.2 |
| Other current assets | 0.4 | 0.8 | 0.6 | 0.3 | 0.2 | 0.2 | 0.2 | 0.2 |
| Total Current Assets | 12.2 | 22.0 | 20.3 | 17.6 | 13.9 | 10.6 | 22.0 | 6.2 |
| Property and equipment, net | 5.4 | 4.9 | 5.2 | 3.0 | 3.1 | 3.5 | 2.1 | 0.8 |
| Operating lease right-of-use assets | 0.6 | 0.4 | 0.3 | 0.4 | | | | |
| Intangible assets, net | 0.1 | 0.2 | 0.3 | 0.4 | 0.5 | 0.6 | 0.6 | 0.7 |
| Total Assets | 18.3 | 27.5 | 26.2 | 21.3 | 17.5 | 14.6 | 24.7 | 7.7 |
| |
| LIABILITIES AND STOCKHOLDERS' EQUITY (DEFICIT) | | | | | | | | |
| Current Liabilities | | | | | | | | |
| Accounts payable | 3.0 | 1.5 | 1.5 | 0.6 | 0.8 | 0.4 | 0.3 | |
| Accrued liabilities | 2.9 | 3.8 | 3.5 | 2.2 | 0.9 | 1.3 | 1.4 | 0.4 |
| Deferred revenue | 10.0 | 0.0 | | | | | 0.0 | 0.2 |
| Management and directors' fees payable | 0.1 | 0.1 | 0.1 | 0.0 | 0.0 | 0.0 | 0.1 | 0.1 |
| Current portion of long-term debt | 1.1 | 0.8 | 0.8 | 0.6 | 0.4 | 0.1 | 0.1 | 0.1 |
| Current portion of operating lease liabilities | 0.2 | 0.2 | 0.2 | 0.3 | | | | |
| Current portion of grant repayable | 0.0 | 0.0 | 0.1 | 0.0 | 0.0 | | | |
| Total Current Liabilities | 17.4 | 6.5 | 6.2 | 3.9 | 2.3 | 2.3 | 2.0 | 1.1 |
| Long-term debt, net of current portion | 2.8 | 2.3 | 2.6 | 2.2 | 2.0 | 1.3 | 0.4 | |
| Finance lease liabilities, net of current portion | 0.4 | 0.5 | 0.6 | 0.6 | | | | |
| Operating lease liabilities, net of current portion | 0.4 | 0.2 | 0.2 | 0.1 | | | | |
| Grant repayable, net of current portion | 0.4 | 0.3 | 0.3 | 0.3 | 0.3 | | | |
| Total Long-Term Liabilities | 2.8 | 2.3 | 2.6 | 2.2 | 2.0 | | | |
| Total Liabilities | 21.4 | 9.8 | 9.9 | 7.1 | 5.3 | 4.7 | 3.6 | 1.7 |
| |
| Stockholders' Equity (Deficit) | | | | | | | | |
| Common Stock Authorized: 100 | 0.1 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Additional paid-in capital | 164.4 | 154.7 | 126.5 | 103.9 | 85.6 | 65.8 | 62.3 | 35.1 |
| Accumulated other comprehensive income | 0.2 | 0.1 | -0.1 | 0.1 | 0.2 | -0.1 | -0.2 | -0.1 |
| Accumulated deficit | -167.3 | -137.0 | -110.2 | -89.8 | -73.7 | -55.7 | -40.9 | -29.0 |
| Total VolitionRx Limited Stockholders' Equity (Deficit) | -3.1 | 17.7 | 16.3 | 14.2 | 12.1 | 10.0 | 21.2 | 6.0 |
| Total Stockholders' Equity (Deficit) | | | 16.3 | 14.2 | | | | |
| Total Liabilities and Stockholders' Equity (Deficit) | 18.3 | 27.5 | 26.2 | 21.3 | 17.5 | 14.6 | 24.7 | 7.7 |