In millions, except per share items | Mar-31-23 | Mar-31-22 | Mar-31-21 | Mar-31-20 | Mar-31-19 | Mar-31-18 | Sep-30-17 | Mar-31-17 |
| 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K/A | 10-K |
Investment income: | | | | | | | | |
Interest income: | | | | | | | | |
Interest income | | | | | | | | |
Payment-in-kind interest income: | | | | | | | | |
Payment-in-kind interest income | | | | | | | | |
Dividend income: | | | | | | | | |
Dividend income | | | | | | | | |
Fee income: | | | | | | | | |
Other income | 0.1 | | 0.0 | | | | | |
Total investment income | 119.3 | | 68.1 | | | | | |
Compensation | 9.9 | | 7.8 | | | | | |
Share-based compensation | 0.2 | | 2.9 | | | | | |
Interest | -28.9 | | -17.9 | | | | | |
Professional fees | 3.2 | | 2.2 | | | | | |
General and administrative | 4.6 | | 3.1 | | | | 8.1 | |
Total operating expenses | 50.3 | | 33.9 | | | | | |
Income before taxes | 69.0 | 8,637.9 | 34.1 | 12,254.9 | 12,637.7 | 10,452.6 | | 8,141.8 |
Federal income, excise and other taxes | 0.6 | | 0.6 | | | | | |
|
Deferred taxes | | | | | | | | |
Total income tax provision | | | | | | | | |
Net investment income | | | | | | | | |
Realized (loss) gain | | | | | | | | |
Realized (loss) gain | | | | | | | | |
Income tax provision | | | | | | | | |
Total net realized (loss) gain on investments, net of tax | | | | | | | | |
Net unrealized appreciation (depreciation) on investments | | | | | | | | |
Unrealized gain (loss) | | | | | | | | |
Income tax provision | | | | | | | | |
Total net unrealized appreciation (depreciation) on investments, net of tax | | | | | | | | |
Net realized and unrealized (losses) gains on investments | | | | | | | | |
Net increase in net assets from operations | 33.1 | | 50.9 | | | | 1.8 | |
Pre-tax net investment income per share - basic (in usd per share) | 0.0 | | 0.0 | | | | | |
Pre-tax net investment income per share - diluted (in usd per share) | 0.0 | | 0.0 | | | | | |
|
Net investment income per share – basic (in usd per share) | $2.29 | | $1.66 | | | | | |
Net investment income per share – diluted (in usd per share) | $2.29 | | $1.66 | | | | | |
Net increase in net assets from operations – basic (in usd per share) | 0.0 | | 0.0 | | | | | |
Net increase in net assets from operations – diluted (in usd per share) | 0.0 | | 0.0 | | | | | |
|
Weighted average shares outstanding – basic (in share) | 30.0 | | 19.1 | | | | | |
Weighted average shares outstanding – diluted (in share) | 30.0 | | 19.1 | | | | | |