| In millions, except per share items | Jul-31-21 | Jul-31-20 | Jul-31-19 | Jul-31-18 | Jul-31-17 | Jul-31-16 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| REVENUE | | | | | | |
| Rental – Third Party | 0.9 | 1.5 | 1.5 | | | |
| Rental – Related Party | 2.1 | 2.1 | 2.1 | | | |
| Other – Related Party | 0.5 | 0.5 | | | | |
| Total revenue | 4.0 | 4.9 | 4.9 | 4.4 | 5.6 | 5.6 |
| Total revenue growth | -19.1% | -0.4% | 12.8% | -22.2% | 0.5% | |
| COSTS AND EXPENSES | | | | | | |
| Research and development | 4.9 | 2.4 | 1.0 | | | |
| Depreciation and amortization | 1.5 | 1.9 | 1.8 | | | |
| Provision for losses on related party receivables | 7.0 | | | | | |
| Loss from operations | -29.8 | -8.5 | -6.7 | | 4.5 | |
| Operating margin | -750.7% | -172.4% | -135.8% | | 80.3% | |
| Loss from continuing operations before income taxes | -25.1 | -6.9 | -4.9 | -3.6 | 0.2 | 1.2 |
| Provision for income taxes | 0.0 | 0.0 | 0.0 | 8.4 | 0.1 | 0.4 |
| Equity in loss of RP Finance | 0.4 | 0.2 | | | | |
| Consolidated net loss from continuing operations | -24.8 | -10.8 | -4.7 | -11.6 | 0.1 | 0.7 |
| |
| Discontinued Operations (Note 3) | | | | | | |
| Consolidated net loss | | | -4.9 | | | |
| Net loss attributable to noncontrolling interests | | | -0.2 | | | |
| Net loss attributable to Rafael Holdings, Inc. | | | -4.7 | | | |
| |
| OTHER COMPREHENSIVE LOSS | | | | | | |
| Consolidated net loss | | | -4.9 | | | |
| |
| Total comprehensive loss | | | | | | |
| Comprehensive loss attributable to noncontrolling interests | | | | | | |
| Total comprehensive loss attributable to Rafael Holdings, Inc. | -24.8 | -10.8 | -4.5 | | | |
| |
| Loss per share attributable to common shareholders | | | | | | |
| |
| Total basic and diluted (loss) per share (in Dollars per share) | ($1.49) | ($0.66) | ($0.35) | ($0.93) | $0.01 | $0.06 |
| |
| Weighted average number of shares used in calculation of loss per share | | | | | | |
| Basic and diluted (in Shares) | 16.5 | 15.8 | 13.3 | 12.5 | 12.5 | 12.5 |