| In millions, except per share items | Jun-30-23 | Mar-31-23 | Dec-31-22 | Sep-30-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 |
| | 10-Q | 10-Q | 8-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q |
| Revenues: | | | | | | | | |
| Total revenues | 26.4 | 44.0 | 50.4 | 66.1 | 50.1 | 36.5 | 72.5 | 64.8 |
| Total revenues growth | -47.4% | 20.4% | -30.5% | 1.9% | -40.8% | -33.8% | 3.5% | 54.9% |
| Operating costs and expenses: | | | | | | | | |
| Cost of Captisol | 1.7 | 3.7 | 21.6 | 14.2 | 12.4 | 4.7 | 12.0 | 11.4 |
| Amortization of intangibles | 8.5 | 8.5 | | 11.8 | 8.6 | 8.6 | 11.8 | 11.8 |
| Research and development | 6.9 | 6.7 | | 22.0 | 8.5 | 9.2 | 18.2 | 16.9 |
| General and administrative | 11.3 | 10.9 | 31.1 | 17.4 | 12.1 | 11.9 | 17.7 | 12.7 |
| Total operating costs and expenses | 28.3 | 29.8 | 70.5 | 65.5 | 41.5 | 34.4 | 59.7 | 49.1 |
| Operating (loss) income from continuing operations | -2.0 | 14.2 | -20.1 | 0.6 | 8.7 | 2.1 | 12.7 | 15.7 |
| Operating margin | -7.5% | 32.3% | -39.9% | 1.0% | 17.3% | 5.8% | 17.6% | 24.2% |
| |
| Other income (expense): | | | | | | | | |
| Gain (loss) from short-term investments | 4.0 | 39.5 | | -0.9 | -1.9 | -12.9 | -12.1 | 1.9 |
| Interest income | 2.3 | 1.4 | 0.8 | 0.6 | 0.3 | 0.1 | 0.2 | 0.2 |
| Interest expense | -0.3 | -0.2 | | -0.3 | -0.4 | -0.8 | -4.5 | -4.4 |
| Other (loss) income, net | -0.9 | 0.6 | -0.8 | 0.9 | 2.0 | 2.3 | -3.3 | 1.9 |
| Total other income (expense), net | 5.2 | 41.3 | -0.8 | 1.1 | 2.0 | -11.3 | -19.8 | 1.4 |
| Income tax (expense) benefit | -0.9 | -11.9 | -38.7 | -0.5 | 3.9 | -3.8 | 1.6 | -1.5 |
| Net income (loss) from continuing operations | 2.3 | 43.6 | -14.5 | 0.4 | 12.6 | -12.9 | -5.4 | 13.7 |
| Net income (loss) | 2.3 | 41.9 | -17.5 | 0.4 | -0.9 | -15.4 | -5.4 | 13.7 |
| |
| Earnings per share | | | | | | | | |
| Basic net income (loss) from continuing operations per share (in USD per share) | 0.0 | 0.0 | | | 0.0 | 0.0 | | |
| Basic net loss from discontinued operations per share (in USD per share) | | 0.0 | | | 0.0 | 0.0 | | |
| |
| Basic net income (loss) per share (in USD per share) | $0.13 | $2.46 | ($1.04) | $0.02 | ($0.05) | ($0.91) | ($0.33) | $0.82 |
| |
| Shares used in basic per share calculations (in shares) | 17.3 | 17.1 | 16.8 | 16.9 | 16.9 | 16.8 | 16.6 | 16.7 |
| Diluted net income | 0.0 | 0.0 | | | 0.0 | 0.0 | | |
| Diluted net loss from discontinued operations per share (in USD per share) | | 0.0 | | | 0.0 | 0.0 | | |
| Diluted net income (loss) per share (in USD per share) | $0.13 | $2.33 | ($1.04) | $0.02 | ($0.05) | ($0.91) | ($0.33) | $0.80 |
| Shares used in diluted per share calculations (in shares) | 17.7 | 18.0 | 16.8 | 17.1 | 17.1 | 16.8 | 17.2 | 17.1 |