| In millions, except per share items | Jun-30-23 | Jun-05-23 | Mar-31-23 | Mar-05-23 | Dec-31-22 | Dec-05-22 | Sep-30-22 | Sep-05-22 |
| | 10-Q | 8-K | 10-Q | 8-K | 10-K | 8-K | 10-Q | 8-K |
| Revenues | | 165.4 | 136.6 | 161.1 | 140.1 | 165.0 | 130.5 | 156.8 |
| Revenues growth | | 12.0% | 23.6% | 23.2% | -1.7% | 0.7% | 8.4% | 12.4% |
| Costs and expenses: | | | | | | | | |
| |
| Marketing and selling | | | | | | | | |
| General and administrative | | 38.3 | | 32.4 | | 31.9 | 30.2 | 30.2 |
| Depreciation and amortization | | 2.7 | 2.6 | | 2.5 | | 2.2 | |
| Change in fair value of contingent consideration | | -1.1 | 0.0 | 0.0 | -3.3 | | 1.2 | -1.2 |
| Income from operations | | 17.6 | 30.3 | 33.5 | 11.6 | 24.8 | 21.7 | 21.7 |
| Operating margin | | 10.7% | 22.2% | 20.8% | | | | |
| |
| Other (income) expense: | | | | | | | | |
| Interest expense – net | | 2.8 | | 3.3 | | 3.3 | 2.9 | 2.9 |
| Loss on extinguishment of debt | | | | | | | | |
| Other (income) expense | | -1.0 | | 0.3 | | 1.6 | 0.1 | -0.1 |
| |
| Income before income taxes | | | | | | | | |
| Income tax expense (benefit) | | | | | | | | |
| Net income | | | 30.3 | | -17.3 | | 18.7 | |
| Net income attributable to redeemable noncontrolling interests | | | | | | | 11.1 | |
| Net income attributable to Class A Common Stockholders | | 30.7 | 12.2 | 12.2 | 52.2 | 10.1 | 7.7 | 7.7 |
| |
| Net income per Class A common stock: | | | | | | | | |
| Basic | | | | | | | | |
| Diluted | | | | | | | | |
| Weighted average Class A Common Stock outstanding | | | | | | | | |
| Basic | | | | | | | | |
| Diluted | | | | | | | | |