Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Operating activities
Net income	$ 13.9	$ 8.2
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation	5.6	4.0
Allowance for credit losses	0.9	0.3
Depreciation and amortization	14.0	14.1
Non-cash operating lease expense	1.2	1.1
Amortization of deferred financing fees and debt discount	1.0	2.2
Deferred income taxes	1.6	2.5
Remeasurement of contingent consideration	3.6	(0.7)
Changes in operating assets and liabilities, net of effect of businesses acquired:
Trade and other receivables	(1.2)	(7.7)
Prepaid expenses and other current assets	16.2	3.5
Other noncurrent assets	0.4	0.3
Accounts payable and other current liabilities	5.6	0.9
Cancelled event liabilities	(0.1)	0.0
Contingent consideration	(0.2)	(0.2)
Income tax payable	1.1	(5.1)
Deferred revenues	(34.2)	(4.1)
Operating lease liabilities	(1.8)	(1.7)
Other noncurrent liabilities	0.9	(0.5)
Net cash provided by operating activities	28.5	17.1
Investing activities
Acquisition of businesses, net of cash acquired	(141.5)	(12.7)
Escrow payment for business acquisition	(2.7)	0.0
Working capital adjustment receivable from seller	0.0	1.0
Purchases of property and equipment	(0.3)	(0.5)
Purchases of intangible assets	(3.6)	(4.7)
Net cash used in investing activities	(148.1)	(16.9)
Financing activities
Payment of contingent consideration for acquisition of businesses	(0.4)	0.0
Proceeds from Second Amended and Restated Term Loan Facility	275.4	0.0
Repayment of principal on Extended Term Loan Facility	(169.5)	(2.1)
Original issuance discount	(1.3)	0.0
Fees paid for debt issuance	(2.1)	0.0
Repurchase of common stock	(15.7)	(1.8)
Dividends on common stock	(6.0)	0.0
Preferred stock cash dividend	0.0	(8.6)
Proceeds from issuance of common stock under equity plans	0.2	1.3
Net cash provided by (used in) financing activities	80.6	(11.2)
Effect of foreign exchange rates on cash and cash equivalents	0.6	0.0
Net decrease in cash and cash equivalents	(38.4)	(11.0)
Cash and cash equivalents
Beginning of period	194.8	204.2
End of period	156.4	193.2
Supplemental disclosure of non-cash investing and financing activities:
Unpaid capital expenditures	0.1	0.7
Conversion of redeemable convertible preferred stock to common stock	0.0	501.2
Second Amended and Restated Term Loan Facility	239.6	0.0
Extended Term Loan Facility	$ (239.6)	$ 0.0