Emerald Holding (EEX) 10-Q 3 Aug 23 2023 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2023	Jul. 31, 2023
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2023
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q2
Trading Symbol	EEX
Entity Registrant Name	Emerald Holding, Inc.
Entity Central Index Key	0001579214
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Shell Company	false
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		62,876,864
Title of 12(b) Security	Common Stock, par value $0.01 per share
Security Exchange Name	NYSE
Entity File Number	001-38076
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	42-1775077
Entity Address, Address Line One	100 Broadway
Entity Address, Address Line Two	14th Floor
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10005
City Area Code	949
Local Phone Number	226-5700
Document Quarterly Report	true
Document Transition Report	false

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Current assets
Cash and cash equivalents	$ 204.7	$ 239.1
Trade and other receivables, net of allowances of $1.5 million as of June 30, 2023 and December 31, 2022, respectively	92.2	74.9
Prepaid expenses and other current assets	17.6	17.8
Total current assets	314.5	331.8
Noncurrent assets
Property and equipment, net	1.9	2.2
Intangible assets, net	188.1	204.8
Goodwill, net	553.9	545.5
Right-of-use lease assets	11.1	10.6
Other noncurrent assets	3.4	3.5
Total assets	1,072.9	1,098.4
Current liabilities
Accounts payable and other current liabilities	50.2	58.1
Income tax payable	1.1	1.2
Cancelled event liabilities	2.7	3.3
Deferred revenues	162.4	151.2
Contingent consideration	0.5	3.5
Right-of-use lease liabilities, current portion	4.4	4.9
Term loan, current portion	4.2
Total current liabilities	225.5	222.2
Noncurrent liabilities
Term loan, net of discount and deferred financing fees	398.9	413.9
Deferred tax liabilities, net	2.6	1.8
Right-of-use lease liabilities, noncurrent portion	10.6	10.4
Other noncurrent liabilities	10	10.8
Total liabilities	647.6	659.1
Commitments and contingencies (Note 13)
Stockholders’ deficit
Common stock, $0.01 par value; authorized shares at June 30, 2023 and December 31, 2022: 800,000; 62,871 and 67,588 shares issued and outstanding at June 30, 2023 and December 31, 2022, respectively	0.6	0.7
Additional paid-in capital	577	610.3
Accumulated deficit	(645.1)	(644.1)
Total stockholders’ deficit	(67.5)	(33.1)
Total liabilities, redeemable convertible preferred stock and stockholders’ deficit	1,072.9	1,098.4
7% Series A Redeemable Convertible Participating Preferred Stock [Member]
Redeemable convertible preferred stock
7% Series A Redeemable Convertible Participating Preferred stock, $0.01 par value; authorized shares at June 30, 2023 and December 31, 2022: 80,000; 71,403 and 71,417 issued and outstanding; aggregate liquidation preference of $492.6 million and $475.9 million at June 30, 2023 and December 31, 2022, respectively	$ 492.8	$ 472.4

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Allowance - trade and other receivables, current	$ 1.5	$ 1.5
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	800,000,000	800,000,000
Common stock, shares issued	62,871,000	67,588,000
Common stock, shares outstanding	62,871,000	67,588,000
7% Series A Redeemable Convertible Participating Preferred Stock [Member]
Temporary equity, par value	$ 0.01	$ 0.01
Temporary equity, shares authorized	80,000,000	80,000,000
Temporary equity, shares issued	71,403,000	71,403,000
Temporary equity, shares outstanding	71,417,000	71,417,000
Temporary equity, liquidation preference	$ 492.6	$ 475.9

Condensed Consolidated Statemen

Condensed Consolidated Statements of (Loss) Income and Comprehensive (Loss) Income - USD ($) shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Statement [Abstract]
Revenues	$ 86,500,000	$ 71,400,000	$ 208,800,000	$ 169,900,000
Other income, net		8,100,000		31,800,000
Cost of revenues	32,800,000	26,400,000	76,000,000	60,600,000
Selling, general and administrative expense	41,800,000	32,300,000	90,600,000	78,900,000
Depreciation and amortization expense	12,900,000	14,000,000	26,400,000	28,300,000
Goodwill impairment charge	0	0	0	6,300,000
Intangible asset impairment charge				1,600,000
Operating (loss) income	(1,000,000)	6,800,000	15,800,000	26,000,000
Interest expense	11,400,000	4,800,000	19,400,000	8,700,000
Interest income	2,300,000	200,000	3,400,000	200,000
Loss on extinguishment of debt	2,300,000		2,300,000
Other expense	100,000		200,000
(Loss) income before income taxes	(12,500,000)	2,200,000	(2,700,000)	17,500,000
(Benefit from) provision for income taxes	(4,400,000)	2,900,000	(1,700,000)	2,100,000
Net (loss) income and comprehensive (loss) income attributable to Emerald Holding, Inc.	(8,100,000)	(700,000)	(1,000,000)	15,400,000
Accretion to redemption value of redeemable convertible preferred stock	(10,400,000)	(9,600,000)	(20,500,000)	(18,800,000)
Net loss and comprehensive loss attributable to Emerald Holding, Inc. common stockholders	$ (18,500,000)	$ (10,300,000)	$ (21,500,000)	$ (3,400,000)
Basic loss per share	$ (0.29)	$ (0.15)	$ (0.33)	$ (0.05)
Diluted loss per share	$ (0.29)	$ (0.15)	$ (0.33)	$ (0.05)
Basic weighted average common shares outstanding	62,868	69,816	65,048	70,007
Diluted weighted average common shares outstanding	62,868	69,816	65,048	70,007

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Redeemable Convertible Preferred Stock and Stockholders' Deficit - USD ($) shares in Thousands, $ in Millions	Total	Redeemable Convertible Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]
Balances at Dec. 31, 2021	$ (121)		$ 0.7	$ 653.2	$ (774.9)
Balances, shares at Dec. 31, 2021			70,026
Temporary Equity, Balances at Dec. 31, 2021		$ 433.9
Temporary Equity, Balances, shares at Dec. 31, 2021		71,442
Stock-based compensation	3.7			3.7
Stock-based compensation, shares			345
Issuance of common stock under equity plans, shares			20
Accretion to redemption value of redeemable convertible preferred stock	(18.8)			(18.8)
Temporary Equity, Accretion to redemption value of redeemable convertible preferred stock		$ 18.8
Repurchase of common stock	(4.3)			(4.3)
Repurchase of common stock, shares			(1,152)
Temporary Equity, Redeemable convertible preferred stock conversion, shares		(25)
Temporary Equity Redeemable convertible preferred stock conversion		$ (0.2)
Redeemable convertible preferred stock conversion, shares			45
Redeemable convertible preferred stock conversion	0.2			0.2
Net loss and comprehensive loss	15.4				15.4
Balances at Jun. 30, 2022	(124.8)		$ 0.7	634	(759.5)
Balances, shares at Jun. 30, 2022			69,284
Temporary Equity, Balances at Jun. 30, 2022		$ 452.5
Temporary Equity, Balances, shares at Jun. 30, 2022		71,417
Balances at Mar. 31, 2022	(112.9)		$ 0.7	645.2	(758.8)
Balances, shares at Mar. 31, 2022			70,130
Temporary Equity, Balances at Mar. 31, 2022		$ 443.1
Temporary Equity, Balances, shares at Mar. 31, 2022		71,442
Stock-based compensation	1.5			1.5
Stock-based compensation, shares			5
Accretion to redemption value of redeemable convertible preferred stock	(9.6)			(9.6)
Temporary Equity, Accretion to redemption value of redeemable convertible preferred stock		$ 9.6
Repurchase of common stock	(3.3)			(3.3)
Repurchase of common stock, shares			(896)
Temporary Equity, Redeemable convertible preferred stock conversion, shares		(25)
Temporary Equity Redeemable convertible preferred stock conversion		$ (0.2)
Redeemable convertible preferred stock conversion, shares			45
Redeemable convertible preferred stock conversion	0.2			0.2
Net loss and comprehensive loss	(0.7)				(0.7)
Balances at Jun. 30, 2022	(124.8)		$ 0.7	634	(759.5)
Balances, shares at Jun. 30, 2022			69,284
Temporary Equity, Balances at Jun. 30, 2022		$ 452.5
Temporary Equity, Balances, shares at Jun. 30, 2022		71,417
Balances at Dec. 31, 2022	(33.1)		$ 0.7	610.3	(644.1)
Balances, shares at Dec. 31, 2022			67,588
Temporary Equity, Balances at Dec. 31, 2022		$ 472.4
Temporary Equity, Balances, shares at Dec. 31, 2022		71,417
Stock-based compensation	3.9			3.9
Stock-based compensation, shares			307
Issuance of common stock under equity plans, shares			14
Accretion to redemption value of redeemable convertible preferred stock	(20.5)			(20.5)
Temporary Equity, Accretion to redemption value of redeemable convertible preferred stock		$ 20.5
Repurchase of common stock	(16.9)		$ (0.1)	(16.8)
Repurchase of common stock, shares			(5,064)
Temporary Equity, Redeemable convertible preferred stock conversion, shares		(14)
Temporary Equity Redeemable convertible preferred stock conversion		$ (0.1)
Redeemable convertible preferred stock conversion, shares			26
Redeemable convertible preferred stock conversion	0.1			0.1
Net loss and comprehensive loss	(1)				(1)
Balances at Jun. 30, 2023	(67.5)		$ 0.6	577	(645.1)
Balances, shares at Jun. 30, 2023			62,871
Temporary Equity, Balances at Jun. 30, 2023		$ 492.8
Temporary Equity, Balances, shares at Jun. 30, 2023		71,403
Balances at Mar. 31, 2023	(50.9)		$ 0.6	585.5	(637)
Balances, shares at Mar. 31, 2023			62,845
Temporary Equity, Balances at Mar. 31, 2023		$ 482.5
Temporary Equity, Balances, shares at Mar. 31, 2023		71,417
Stock-based compensation	1.8			1.8
Accretion to redemption value of redeemable convertible preferred stock	(10.4)			(10.4)
Temporary Equity, Accretion to redemption value of redeemable convertible preferred stock		$ 10.4
Temporary Equity, Redeemable convertible preferred stock conversion, shares		(14)
Temporary Equity Redeemable convertible preferred stock conversion		$ (0.1)
Redeemable convertible preferred stock conversion, shares			26
Redeemable convertible preferred stock conversion	0.1			0.1
Net loss and comprehensive loss	(8.1)				(8.1)
Balances at Jun. 30, 2023	$ (67.5)		$ 0.6	$ 577	$ (645.1)
Balances, shares at Jun. 30, 2023			62,871
Temporary Equity, Balances at Jun. 30, 2023		$ 492.8
Temporary Equity, Balances, shares at Jun. 30, 2023		71,403

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Cash Flows - USD ($)	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Operating activities
Net (loss) income	$ (1,000,000)	$ 15,400,000
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Stock-based compensation	3,900,000	3,700,000
Allowance for credit losses	200,000	200,000
Depreciation and amortization	26,400,000	28,300,000
Goodwill impairments	0	6,300,000
Intangible asset impairments		1,600,000
Non-cash operating lease expense	1,300,000	1,600,000
Amortization of deferred financing fees and debt discount	900,000	600,000
Loss on extinguishment of debt	2,300,000
Deferred income taxes	800,000	200,000
Loss on disposal of fixed assets	200,000	0
Remeasurement of contingent consideration	(600,000)	(5,800,000)
Changes in operating assets and liabilities, net of effect of businesses acquired:
Trade and other receivables	(15,500,000)	(29,600,000)
Prepaid expenses and other current assets	4,500,000	(5,900,000)
Other noncurrent assets	100,000	(100,000)
Accounts payable and other current liabilities	(7,600,000)	14,800,000
Cancelled event liabilities	(600,000)	(5,400,000)
Contingent consideration		(2,100,000)
Income tax payable	(4,200,000)	1,600,000
Deferred revenues	7,500,000	22,200,000
Operating lease liabilities	(2,100,000)	(2,700,000)
Other noncurrent liabilities	(300,000)	300,000
Net cash provided by operating activities	16,200,000	45,200,000
Investing activities
Acquisition of businesses, net of cash acquired	(9,500,000)	(28,400,000)
Purchase of marketable securities		(50,000,000)
Purchases of property and equipment	(500,000)	(1,100,000)
Purchases of intangible assets	(5,900,000)	(3,800,000)
Net cash used in investing activities	(15,900,000)	(83,300,000)
Financing activities
Payment of contingent consideration for acquisition of businesses	(3,700,000)	(4,400,000)
Repayment of principal on Amended and Restated Term Loan Facility	(239,400,000)	(2,800,000)
Proceeds from Extended Term Loan Facility	239,400,000
Original issuance discount	(12,500,000)
Fees paid for debt issuance	(1,600,000)
Repurchase of common stock	(16,900,000)	(4,300,000)
Proceeds from issuance of common stock under equity plans		100,000
Net cash used in financing activities	(34,700,000)	(11,400,000)
Net decrease in cash and cash equivalents	(34,400,000)	(49,500,000)
Cash and cash equivalents
Beginning of period	239,100,000	231,200,000
End of period	204,700,000	$ 181,700,000
Supplemental disclosure of non-cash financing activities
Amended and restated term loan facility	(175,900,000)
Extended term loan facility	$ 175,900,000

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Jun. 30, 2023
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Basis of Presentation

Basis of Presentation	6 Months Ended
	Jun. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	1. Basis of Presentation The unaudited condensed consolidated financial statements include the operations of Emerald Holding, Inc. (the “Company” or “Emerald”) and its wholly-owned subsidiaries. These unaudited condensed consolidated financial statements are presented in conformity with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X of the SEC for Interim Reporting. All intercompany transactions, accounts and profits/losses, if any, have been eliminated in the unaudited condensed consolidated financial statements. In the opinion of management, all recurring adjustments considered necessary for a fair statement of results for the interim period have been included. These unaudited condensed consolidated financial statements do not include all disclosures required by GAAP, therefore, these unaudited condensed consolidated financial statements should be read in conjunction with the more detailed audited consolidated financial statements for the year ended December 31, 2022. The December 31, 2022 condensed consolidated balance sheet was derived from the Company’s audited consolidated financial statements for the year ended December 31, 2022. Certain reclassifications have been made to prior year amounts to conform to the current year's presentation. The results for the three and six months ended June 30, 2023 are not necessarily indicative of results to be expected for a full year, any other interim periods or any future year or period.

Recent Accounting Pronouncement

Recent Accounting Pronouncements	6 Months Ended
	Jun. 30, 2023
Accounting Changes and Error Corrections [Abstract]
Recent Accounting Pronouncements	2. Recent Accounting Pronouncements Recently Issued Accounting Pronouncements There have been no new accounting pronouncements that are expected to have a significant impact on the Company’s condensed consolidated financial statements or notes thereto.

Revenues

Revenues	6 Months Ended
	Jun. 30, 2023
Revenue from Contract with Customer [Abstract]
Revenues	3. Revenues Revenue Recognition and Deferred Revenue Revenue is recognized as the customer receives the benefit of the promised services and performance obligations are satisfied. Revenue is recognized at an amount that reflects the consideration the Company expects to receive in exchange for those services. Customers generally receive the benefit of the Company’s services upon the staging of each trade show or conference event and over the subscription period for access to the Company’s subscription software and services. Fees are typically invoiced and collected in full prior to the trade show or event. A significant portion of the Company’s annual revenue is generated from the production of trade shows and conferences (collectively, “trade shows”), including booth space sales, registration fees and sponsorship fees. The Company recognizes revenue in the period the trade show occurs. Trade show and other events revenues represented approximately 86.4 % and 83.8 % of total revenues for the three months ended June 30, 2023 and 2022, respectively. Trade show and other events revenues represented approximately 89.1 % and 86.8 % of total revenues for the six months ended June 30, 2023 and 2022, respectively. Deferred revenues generally consist of booth space sales, registration fees and sponsorship fees that are invoiced prior to a trade show, as well as upfront payments for software subscription fees, professional services and implementation fees for the Company’s subscription software and services. Current deferred revenues were $ 162.4 million as of June 30, 2023 and are reported as deferred revenues on the condensed consolidated balance sheets. Long-term deferred revenues as of June 30, 2023 were $ 1.2 million and are reported as other noncurrent liabilities on the condensed consolidated balance sheets. Current and long-term deferred revenues as of December 31, 2022 were $ 151.2 million and $ 1.4 million, respectively. During the three and six months ended June 30, 2023 , the Company recognized revenues of $ 72.6 million and $ 182.6 million, respectively, from amounts included in deferred revenue at the beginning of the respective period. During the three and six months ended June 30, 2022 , the Company recognized revenues of $ 59.3 million and $ 144.0 million, respectively, from amounts included in deferred revenue at the beginning of the respective period. The accounts receivable and deferred revenue balances related to cancelled events are classified as cancelled event liabilities in the condensed consolidated balance sheets as the total amount represents balances which are expected to be refunded to customers. As of June 30, 2023, cancelled event liabilities of $ 2.7 million represents $ 0.7 million of deferred revenues for cancelled trade shows and $ 2.0 million of related accounts receivable credits reclassified to cancelled event liabilities in the condensed consolidated balance sheets. As of December 31, 2022, cancelled event liabilities of $ 3.3 million represented $ 0.8 million of deferred revenues for cancelled trade shows and $ 2.5 million of related accounts receivable credits reclassified to cancelled event liabilities in the condensed consolidated balance sheets. Performance Obligations For the Company’s trade shows and other events, sales are deferred and recognized when performance obligations under the terms of a contract with the Company’s customers are satisfied, which is typically at the completion of a show or event. Revenue is measured as the amount of consideration the Company expects to receive upon completion of its performance obligations. For the Company’s subscription software and services, the Company may enter into contracts with customers that may include multiple performance obligations, which are generally capable of being distinct. Fees associated with implementation and related professional services are deferred and recognized over the expected customer life, which is four years . Subscription revenue is recognized over the term of the contract. The Company’s contracts associated with the subscription software and services are typically three-year terms with one-year renewals following the initial three-year term. For the Company’s other marketing services, revenues are deferred and recognized when performance obligations under the terms of a contract with the Company’s customers are satisfied. This generally occurs in the period in which the publications are issued. Revenue is measured as the amount of consideration the Company expects to receive upon completion of its performance obligations. The Company applies a practical expedient which allows the exclusion of disclosure information regarding remaining performance obligations if the performance obligation is part of a contract that has an expected duration of one year or less. The Company’s performance obligations greater than one year are immaterial. Disaggregation of Revenue The Company’s primary sources of revenue are from trade shows, other events, subscription software and services and other marketing services. The following table represents revenues disaggregated by type: Reportable Segment Commerce Design, All Other Total Three Months Ended June 30, 2023 (in millions) Trade shows $ 16.2 $ 37.7 $ 1.2 $ 55.1 Other events 3.6 16.0 — 19.6 Subscription software and services — 0.6 4.7 5.3 Other marketing services 1.3 5.2 — 6.5 Total revenues $ 21.1 $ 59.5 $ 5.9 $ 86.5 Three Months Ended June 30, 2022 Trade shows $ 17.7 $ 31.9 $ 0.9 $ 50.5 Other events — 9.3 — 9.3 Subscription software and services — 0.8 3.5 4.3 Other marketing services 1.7 5.6 — 7.3 Total revenues $ 19.4 $ 47.6 $ 4.4 $ 71.4 Six Months Ended June 30, 2023 Trade shows $ 84.3 $ 65.6 $ 2.3 $ 152.2 Other events 3.8 30.0 — 33.8 Subscription software and services 0.1 1.2 9.2 10.5 Other marketing services 3.0 9.3 — 12.3 Total revenues $ 91.2 $ 106.1 $ 11.5 $ 208.8 Six Months Ended June 30, 2022 Trade shows $ 71.8 $ 55.4 $ 1.9 $ 129.1 Other events 0.5 17.9 — 18.4 Subscription software and services — 1.6 6.9 8.5 Other marketing services 3.7 10.2 — 13.9 Total revenues $ 76.0 $ 85.1 $ 8.8 $ 169.9 Contract Balances The Company’s contract assets are primarily sales commissions incurred in connection with the Company’s subscription software and services, which are expensed over the expected customer relationship period. As of June 30, 2023, the Company does not have material contract assets. Contract liabilities generally consist of booth space sales, registration fees, sponsorship fees that are collected prior to the trade show or other event and subscription revenue, implementation fees and professional services associated with the Company’s subscription software and services. Contract liabilities less than one year from the date of the performance obligation are reported on the condensed consolidated balance sheets as deferred revenues. Contract liabilities greater than one year from the date of the performance obligation are reported on the condensed consolidated balance sheets in other noncurrent liabilities. The Company’s sales commission costs incurred in connection with sales of booth space, registration fees and sponsorship fees at the Company’s trade shows and other events and with sales of advertising for industry publications are generally short term, as sales typically begin up to one year prior to the date of the trade shows and other events. The Company expects the period benefited by each commission to be less than one year , and as a result, the Company expenses sales commissions associated with trade shows, other events and other marketing services as incurred. Sales commissions are reported on the condensed consolidated statements of (loss) income and comprehensive (loss) income as selling, general and administrative expense. Accounts Receivable The Company monitors collections and payments from its customers and maintains an allowance based upon applying an expected credit loss rate to receivables based on the historical loss rate from similar customers adjusted for current conditions, including any specific customer collection issues identified, and forecasts of economic conditions. Delinquent account balances are written off after management has determined that the likelihood of collection is remote. The activities in this account, including the current-period provision for expected credit losses for the three and six months ended June 30, 2023 and 2022 , were not material.

Business Acquisitions

Business Acquisitions	6 Months Ended
	Jun. 30, 2023
Business Combinations [Abstract]
Business Acquisition	4. Business Acquisitions 2023 Acquisition Lodestone Events ("Lodestone") In furtherance of the Company’s strategy to expand into the growing business-to-consumer event space, the Company executed an asset purchase agreement on January 9, 2023 to acquire certain assets and assume certain liabilities of the business known as Lodestone for a total estimated purchase price of $ 10.2 million, which included an initial cash payment of $ 9.5 million and contingent consideration with an estimated fair value of $ 0.7 million. The contingent consideration liability related to the acquisition of Lodestone consists of a potential payment based on Lodestone's average annual EBITDA during the period from January 1, 2025 through December 31, 2026. The payment is expected to be settled in the second quarter of 2027. Lodestone produces the Overland Expo series of vehicle-based, adventure travel consumer shows. The acquisition was financed with cash from operations. The preparation of the valuation required the use of significant assumptions and estimates. Critical estimates included, but were not limited to, future expected cash flows, including projected revenues and expenses, royalty rate and the applicable discount rates. These estimates were based on assumptions that the Company believes to be reasonable, however, actual results may differ from these estimates. External acquisition costs of $ 0.4 million were expensed as incurred and included in selling, general and administrative expenses in the condensed consolidated statements of (loss) income and comprehensive (loss) income. During the three and six months ended June 30, 2023, the acquisition of Lodestone generated revenue of $ 3.2 million and net income of $ 1.1 million and $ 0.8 million, respectively. Goodwill was calculated as the excess of the purchase price over the estimated fair values of acquired assets and intangible assets offset by liabilities acquired, and is primarily attributable to the future economic benefits from synergies expected to arise due to certain cost savings, operating efficiencies and other strategic benefits. Substantially all of the goodwill recorded is expected to be deductible for income tax purposes. Identified intangible assets associated with Lodestone included trade name and customer relationship intangible assets of $ 1.1 million and $ 2.3 million, respectively. The weighted-average amortization period of the trade name intangible assets acquired was 5.0 years. The weighted-average amortization period of the customer relationship intangible assets acquired was 6.0 years. There is no assumed residual value for the acquired trade name and customer relationship intangible assets. The measurement period for the acquisition closed in the second quarter of 2023. The following table summarizes the fair value of the acquired assets and liabilities on the acquisition date: (in millions) January 9, Trade and other receivables $ 1.8 Prepaid expenses and other current assets 0.2 Goodwill 8.4 Intangible assets 3.4 Deferred revenues ( 3.6 ) Purchase price, including working capital adjustment $ 10.2 Supplemental Pro-Forma Information Supplemental information on an unaudited pro-forma basis is reflected as if the 2022 and 2023 acquisitions had occurred at the beginning of 2022, after giving effect to certain pro-forma adjustments primarily related to the amortization of acquired intangible assets and interest expense. The unaudited pro-forma supplemental information is based on estimates and assumptions that the Company believes are reasonable and reflects amortization of intangible assets as a result of the acquisition. The supplemental unaudited pro-forma financial information is presented for comparative purposes only. It is not necessarily indicative of what the Company’s financial position or results of operations actually would have been had the Company completed the acquisition at the dates indicated, nor is it intended to project the future financial position or operating results of the combined Company. Further, the supplemental pro-forma information has not been adjusted for show timing differences or discontinued events. Three Months Ended Six Months Ended 2022 2022 (in millions) (Unaudited) Pro-forma revenues (1) Advertising Week $ 5.3 $ 5.5 Lodestone 2.8 2.8 Emerald revenue 71.4 169.9 Total pro-forma revenues $ 79.5 $ 178.2 Pro-forma net (loss) income Advertising Week $ — $ ( 0.6 ) Bulletin ( 1.1 ) ( 2.2 ) Lodestone 0.6 0.1 Emerald net (loss) income ( 0.7 ) 15.4 Total pro-forma net (loss) income $ ( 1.2 ) $ 12.7 (1) Pro-forma revenues from the Bulletin acquisition were not material to the three and six months ended June 30, 2022.

Property and Equipment

Property and Equipment	6 Months Ended
	Jun. 30, 2023
Property, Plant and Equipment [Abstract]
Property and Equipment	5. Property and Equipment Property and equipment, net, consisted of the following: (in millions) June 30, December 31, Furniture, equipment and other $ 5.1 $ 4.8 Leasehold improvements 1.0 1.0 6.1 5.8 Less: Accumulated depreciation ( 4.2 ) ( 3.6 ) Property and equipment, net $ 1.9 $ 2.2 Depreciation expense related to property and equipment for the three and six months ended June 30, 2023 was $ 0.2 million and $ 0.5 million, respectively. Depreciation expense related to property and equipment for the three and six months ended June 30, 2022 was $ 0.3 million and $ 0.6 million, respectively. Loss on disposal of fixed assets was zero and $ 0.2 million, respectively, for the three and six months ended June 30, 2023 . There was no loss on disposal of fixed assets for the three and six months ended June 30, 2022 .

Intangible Assets and Goodwill

Intangible Assets and Goodwill	6 Months Ended
	Jun. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets and Goodwill	6. Intangible Assets and Goodwill Intangible Assets, Net Intangible assets, net consisted of the following: (in millions) Indefinite- Customer Definite- Acquired Acquired Computer Capitalized Total Gross carrying $ 52.6 $ 365.4 $ 91.1 $ 8.4 $ 2.6 $ 32.3 $ 1.1 $ 553.5 Accumulated — ( 326.2 ) ( 19.9 ) ( 2.9 ) ( 0.8 ) ( 15.6 ) — ( 365.4 ) Net carrying $ 52.6 $ 39.2 $ 71.2 $ 5.5 $ 1.8 $ 16.7 $ 1.1 $ 188.1 Gross carrying $ 52.6 $ 363.1 $ 90.0 $ 8.4 $ 2.6 $ 25.5 $ 2.1 $ 544.3 Accumulated — ( 306.2 ) ( 17.2 ) ( 2.2 ) ( 0.6 ) ( 13.3 ) — ( 339.5 ) Net carrying $ 52.6 $ 56.9 $ 72.8 $ 6.2 $ 2.0 $ 12.2 $ 2.1 $ 204.8 Amortization expense for the three and six months ended June 30, 2023 was $ 12.7 million and $ 25.9 million, respectively. Amortization expense for the three and six months ended June 30, 2022 was $ 13.7 million and $ 27.7 million, respectively. Impairment of Indefinite-Lived Intangible Assets During the three and six months ended June 30, 2023, there were no triggering events or changes in circumstances that would indicate the carrying value of the Company’s indefinite-lived intangible assets was impaired. As such, no quantitative assessment for impairment was required during the first and second quarters of 2023. During the first quarter of 2022, the Company identified an interim impairment trigger for three of its indefinite-lived intangible assets. As a result, the Company performed a quantitative analysis utilizing the "relief from royalty payments" method with assumptions that are considered Level 3 inputs. After performing the interim impairment assessment, the Company recognized an impairment charge of $ 1.6 million related to one of its indefinite-lived trade name intangible assets during the three months ended March 31, 2022. The impairment charge is reported in intangible asset impairment charges on the condensed consolidated statements of (loss) income and comprehensive (loss) income. Indefinite-lived intangible impairment charges in the Design, Creative and Technology reportable segment were $ 1.6 million during the six months ended June 30, 2022. During the three months ended June 30, 2022, there were no triggering events or changes in circumstances that would indicate the carrying value of the Company’s indefinite-lived intangible assets was impaired. As such, no quantitative assessment for impairment was required during the second quarter of 2022. Impairment of Long-Lived Assets Other than Goodwill and Indefinite-Lived Intangible Assets During the three and six months ended June 30, 2023, there were no triggering events or changes in circumstances that would indicate the carrying value of the Company’s long-lived assets other than goodwill are not recoverable. As such, no quantitative assessment for impairment was required during the first and second quarters of 2023. During the first quarter of 2022, the Company identified an interim impairment trigger for two of its definite-lived intangible assets. After performing an interim impairment assessment, the Company determined the carrying values were recoverable. During the three months ended June 30, 2022 , no additional triggering events or changes in circumstances occurred that would indicate the carrying value of the Company's long-lived assets other than goodwill were not recoverable. As such, no quantitative assessment for impairment was required during the second quarter of 2022 and no impairment charges were recorded for definite-lived intangible assets during the three and six months ended June 30, 2022. Goodwill The table below summarizes the changes in the carrying amount of goodwill for each reportable segment: Reportable Segment (in millions) Commerce Design, All Other Total Balance at December 31, 2022 $ 356.1 $ 160.8 $ 28.6 $ 545.5 Acquired goodwill 8.4 — — 8.4 Balance at June 30, 2023 $ 364.5 $ 160.8 $ 28.6 $ 553.9 Impairment of Goodwill During the three and six months ended June 30, 2023, management determined there were no triggering events. As such, no quantitative assessment for impairment was required during the first and second quarters of 2023 . No goodwill impairment charges were recorded during the three and six months ended June 30, 2023. During the first quarter of 2022, the Company changed its operating segments which resulted in a change in reporting units. Due to the change in reporting units, the Company performed a quantitative assessment of the fair value of its prior and new reporting units as of January 31, 2022 using an income approach with assumptions that are considered Level 3 inputs and concluded that the carrying value of one reporting unit exceeded its respective fair value, resulting in a goodwill impairment of $ 5.8 million related to the Design, Creative and Technology segment. The Company also performed a fair value assessment of its new reporting units utilizing similar inputs and, as a result of that assessment, there was $ 0.5 million of goodwill impairment related to one of the Company's new reporting units in the All Other category after the change in reporting units. During the three months ended June 30, 2022 , management determined there was no triggering event and as such, no goodwill impairment charges were recognized during the second quarter of 2022.

Debt

Debt	6 Months Ended
	Jun. 30, 2023
Debt Disclosure [Abstract]
Debt	7. Debt Debt is comprised of the following indebtedness to various lenders: (in millions) June 30, December 31, Extended Term Loan Facility, with 5.10 as of June 30, 2023, 10.20 % at June 30, 2023) due 2026 , net (a) $ 403.1 $ — Amended and Restated Term Loan Facility, with 2.50 as of December 31, 2022 6.57 % at December 31, 2022) due 2024 , net (b) — 413.9 Less: Current maturities 4.2 — Long-term debt, net of debt discount $ 398.9 $ 413.9 (a) The Extended Term Loan Facility (as defined below), scheduled to mature on May 22, 2026 , was recorded net of unamortized discount of $ 10.5 million and net of unamortized deferred financing fees of $ 1.7 million as of June 30, 2023 . The fair market value of the Company’s debt under the Extended Term Loan Facility was $ 404.4 million as of June 30, 2023. (b) The Amended and Restated Term Loan Facility (as defined below) as of December 31, 2022 was recorded net of unamortized discount of $ 0.6 million and net of unamortized deferred financing fees of $ 0.8 million. Term Loan Facility On June 12, 2023, (the “Term Loan Amendment Effective Date”) Emerald X, Inc. (“Emerald X”), a wholly-owned subsidiary of the Company, entered into a Sixth Amendment to its Amended and Restated Credit Agreement (the “Term Loan Amendment”), by and among Emerald X, as Borrower, the guarantors party thereto, the lenders party thereto and Bank of America, N.A., as administrative agent, which amends that certain Amended and Restated Credit Agreement, dated as of May 22, 2017 (as amended from time to time, including by the RCF Amendment referred to below and by the Term Loan Amendment, the “Amended Credit Agreement”). The Term Loan Amendment extended the maturity of the term loans outstanding under the Amended Credit Agreement (such extended term loan facility, the “Extended Term Loan Facility”) from May 22, 2024 to May 22, 2026 . The aggregate outstanding principal amount of the Extended Term Loan Facility was approximately $ 415.3 million as of June 30, 2023 . Of the $ 415.3 million, $ 175.9 million was funded through a non-cash rollover from existing lenders and $ 239.4 million was funded through cash transactions. The Term Loan Amendment replaced the interest rate applicable to the term loans with a rate equal to, at the option of Emerald X, (i) the Term Secured Overnight Financing Rate (“Term SOFR”) plus 5.00 % per annum plus a credit spread adjustment of 0.10 % per annum or (ii) an alternate base rate (“ABR”) plus 4.00 % per annum. Prior to the Term Loan Amendment, the interest rate applicable to the term loans was a rate equal to, at the option of Emerald X (i) LIBOR plus 2.75 % or 2.50 % per annum, depending on Emerald X’s first lien net leverage ratio or (ii) ABR plus 1.75 % or 1.50 % per annum, depending on Emerald X’s first lien net leverage ratio. The effective interest rate at June 30, 2023 and December 31, 2022 was 11.40 % and 6.89 %, respectively. The Term Loan Amendment additionally reset scheduled quarterly payments, each equal to 0.25 % of the original principal amount of the Extended Term Loan Facility. Further, the Term Loan Amendment modified the prepayment provisions so that, upon the occurrence of a repricing transaction, subject to certain specified exceptions, Emerald X will have to pay a prepayment fee of 2 %, in the event of a repricing transaction occurring within the first twelve months after the Term Loan Amendment Effective Date, or 1 %, in the event of a repricing transaction occurring on a date that is between twelve months after the Term Loan Amendment Effective Date and eighteen months after the Term Loan Amendment Effective Date. No prepayment premium is payable for prepayments made after the eighteen month anniversary of the Term Loan Amendment Effective Date. The Extended Term Loan Facility proceeds of $ 415.3 million, net of $ 12.5 million of original issuance discount (“OID”), were used to repay the outstanding principal and interest under the Amended and Restated Term Loan Facility and third party fees of $ 3.5 million. Of the $ 12.5 million of OID paid, $ 2.1 million was recognized as loss on extinguishment of debt and $ 10.4 million will be amortized over the life of the Extended Term Loan Facility using the effective interest method. Of the $ 3.5 million in third party fees, $ 2.1 million was recognized as interest expense and $ 1.4 million will be amortized over the life of the Extended Term Loan Facility using the effective interest method. As of June 30, 2023, there was $ 0.3 million of unpaid debt issuance costs. The loss on extinguishment of debt of $ 2.3 million for the three and six months ended June 30, 2023, included $ 2.1 million of OID related to the Extended Term Loan Facility and $ 0.2 million of previously capitalized OID and debt issuance costs which were allocated to lenders whose balances were extinguished. Revolving Credit Facility On February 2, 2023, Emerald X entered into a Fifth Amendment to its Amended and Restated Credit Agreement (the “RCF Amendment”), by and among Emerald X, as Borrower, the guarantors party thereto, the lenders party thereto and Bank of America, N.A., as administrative agent, which amends the Amended and Restated Credit Agreement, referred to above. The RCF Amendment increased the aggregate amount of all revolving commitments under the Amended Revolving Credit Agreement from $ 100.4 million to $ 110.0 million. The increased revolving commitments have the same terms as the existing revolving commitments. The RCF Amendment does not change any other material terms of the Existing Revolving Credit Agreement. The Company paid $ 0.6 million in financing fees related to the Amended Revolving Credit Agreement during the first quarter of 2023. Emerald X had no borrowings outstanding under its Amended and Restated Revolving Credit Facility as of June 30, 2023 and December 31, 2022 . Emerald X had $ 1.0 million in stand-by letters of credit outstanding under the Amended and Restated Revolving Credit Facility as of June 30, 2023 and December 31, 2022. During the three and six months ended June 30, 2022 , borrowings under the Amended and Restated Revolving Credit Facility were subject to an interest rate equal to LIBOR plus 2.25 % or ABR plus 1.25 %. During the three and six months ended June 30, 2023 , borrowings under the Amended and Restated Revolving Credit Facility were subject to an interest rate equal to Term SOFR plus 2.25 % or ABR plus 1.25 %. Interest Expense Interest expense reported in the condensed consolidated statements of (loss) income and comprehensive (loss) income consists of the following: Three Months Ended Six Months Ended (in millions) 2023 2022 2023 2022 Extended Term Loan Facility $ 2.2 $ — $ 2.2 $ — Amended and Restated Term Loan Facility 6.4 4.3 13.9 7.8 Term Loan Amendment third party fees 2.1 — 2.1 — Non-cash interest for amortization of debt discount 0.5 0.3 0.9 0.6 Revolving credit facility interest and commitment fees 0.2 0.2 0.3 0.3 Total interest expense $ 11.4 $ 4.8 $ 19.4 $ 8.7 Covenants The Amended and Restated Revolving Credit Facility contains a financial covenant requiring Emerald X to comply with a 5.50 to 1.00 Total First Lien Net Secured Leverage Ratio, which is defined as the ratio of Consolidated Total Debt (as defined in the Amended and Restated Senior Secured Credit Facilities) secured on a first lien basis, net of unrestricted cash and cash equivalents to trailing four-quarter Consolidated EBITDA (as defined in the Amended and Restated Senior Secured Credit Facilities). This financial covenant is tested on the last day of each quarter only if the aggregate amount of revolving loans, swingline loans and letters of credit outstanding under the Amended and Restated Revolving Credit Facility (net of up to $ 10.0 million of outstanding letters of credit) exceeds 35 % of the total commitments thereunder. As of June 30, 2023 , the Company was not required to test this financial covenant and Emerald X was in compliance with all covenants under the Amended and Restated Senior Secured Credit Facilities.

Fair Value Measurements and Fin

Fair Value Measurements and Financial Risk	6 Months Ended
	Jun. 30, 2023
Fair Value Disclosures [Abstract]
Fair Value Measurements and Financial Risk	8. Fair Value Measurements and Financial Risk As of June 30, 2023, the Company’s assets and liabilities measured at fair value on a recurring basis are categorized in the table below: (in millions) Total Level 1 Level 2 Level 3 Assets Cash and cash equivalents $ 97.2 $ 97.2 $ — $ — Money market mutual funds (a) 107.5 107.5 — — Total assets at fair value $ 204.7 $ 204.7 $ — $ — Liabilities Market-based share awards liability (b) $ 0.5 $ — $ — $ 0.5 Contingent consideration (b) 8.7 — — 8.7 Total liabilities at fair value $ 9.2 $ — $ — $ 9.2 (a) The Company’s money market mutual funds of $ 107.5 million as of June 30, 2023 are included within cash and cash equivalents in the condensed consolidated balance sheets. The money market mutual funds are traded in active markets and quoted in broker or dealer quotations and are classified as Level 1 assets. The fair value of the Company’s money market mutual funds is based on unadjusted quoted prices on the reporting date. (b) The market-based share awards liability of $ 0.5 million as of June 30, 2023 is included within other noncurrent liabilities in the condensed consolidated balance sheet. The fair value of the Company’s market-based share awards and contingent consideration are derived from valuation techniques in which one or more significant inputs are unobservable, including the Company’s own assumptions. Contingent consideration of $ 0.5 million as of June 30, 2023 is included within contingent consideration in the condensed consolidated balance sheets and contingent consideration of $ 8.2 million is included within other noncurrent liabilities in the condensed consolidated balance sheets. As of December 31, 2022, the Company’s assets and liabilities measured at fair value on a recurring basis are categorized in the table below: (in millions) Total Level 1 Level 2 Level 3 Assets Cash and cash equivalents $ 147.5 $ 147.5 $ — $ — Money market mutual funds (a) 91.6 91.6 — — Total assets at fair value $ 239.1 $ 239.1 $ — $ — Liabilities Market-based share awards liability (b) $ 0.4 $ — $ — $ 0.4 Contingent consideration (b) 12.3 — — 12.3 Total liabilities at fair value $ 12.7 $ — $ — $ 12.7 (a) The Company’s money market mutual funds are based on the closing price of these assets as of the reporting date. The fair value of the Company’s money market mutual funds is based on unadjusted quoted prices on the reporting date. The Company’s money market mutual funds are quoted in an active market and classified as Level 1 assets. (b) The fair value of the Company’s market-based share awards and contingent consideration are derived from valuation techniques in which one or more significant inputs are unobservable, including the Company’s own assumptions. Market-based Share Awards The market-based share awards liability of $ 0.5 million and $ 0.4 million as of June 30, 2023 and December 31, 2022 , respectively, entitles the grantees of these awards the right to receive shares of common stock equal to a maximum cash value of $ 9.8 million, in the aggregate, upon achievement of specified targeted share prices measured over sixty days within a ninety-day trading period. The liability is measured at fair value and is re-measured to an updated fair value at each reporting period. The Company recognizes stock-based compensation expense for awards subject to market-based vesting conditions regardless of whether it becomes probable that these conditions will be achieved. The stock-based compensation expense is included in selling, general and administrative expense in the condensed consolidated statements of (loss) income and comprehensive (loss) income. Refer to Note 10, Stock-Based Compensation , under the heading Market-based Share Awards for unobservable inputs for the market-based share award liability. Contingent Consideration As of December 31, 2022, the Company had $ 12.3 million in contingent consideration liabilities measured at fair value related to the Company’s acquisitions of EDspaces, PlumRiver Technologies ("PlumRiver"), Sue Bryce Education and The Portrait Masters, AV-IQ, Advertising Week, and Bulletin. As of June 30, 2023, the Company had $ 8.7 million in contingent consideration liabilities measured at fair value related to the Company’s acquisitions of AV-IQ, Advertising Week, Bulletin and Lodestone. The contingent consideration liability of $ 8.7 million as of June 30, 2023 consists of liabilities of $ 0.5 million, $ 0.2 million and $ 8.1 million that are expected to be settled in 2024, 2025 and 2027, respectively. Refer to Note 4, Business Acquisitions , for further information related to the contingent consideration of $ 0.7 million related to the acquisition of Lodestone. The contingent consideration paid during the first quarter of 2023 in relation to the Company's acquisition of EDspaces was not material. The Company paid $ 3.7 million in contingent consideration during the second quarter of 2023 in relation to the Company's acquisition of PlumRiver. Contingent consideration liabilities are re-measured to fair value each reporting period. As a result of the Company’s remeasurements during the first and second quarters of 2023 , the Company recorded a $ 0.7 million decrease in fair value of contingent consideration, which is included in selling, general and administrative expense in the condensed consolidated statements of (loss) income and comprehensive (loss) income. The determination of the fair value of the contingent consideration liabilities could change in future periods. Any such changes in fair value will be reported in selling, general and administrative expense in the condensed consolidated statements of (loss) income and comprehensive (loss) income. Financial Risk The Company’s condensed consolidated financial statements reflect estimates and assumptions made by management that affect the reported amount of assets and liabilities.

Stockholder's Equity Deficit an

Stockholder's Equity Deficit and Redeemable Convertible Preferred Stock	6 Months Ended
	Jun. 30, 2023
Temporary Equity And Stockholders Equity Note [Abstract]
Stockholder's Deficit and Redeemable Convertible Preferred Stock	9. Stockholder’s Deficit and Redeemable Convertible Preferred Stock Redeemable Convertible Preferred Stock On June 10, 2020, the Company entered into an investment agreement (the “Investment Agreement”) with Onex Partners V LP (“Onex”), pursuant to which the Company agreed to (i) issue to an affiliate of Onex, in a private placement transaction (the “Initial Private Placement”), 47,058,332 shares of redeemable convertible preferred stock for a purchase price of $ 5.60 per share and (ii) effect a rights offering (“Rights Offering”) to holders of its outstanding common stock of one non-transferable subscription right for each share of the Company’s common stock held, with each right entitling the holder to purchase one share of redeemable convertible preferred stock at the Series A Price per share. Onex agreed to purchase (the “Onex Backstop”) any and all redeemable convertible preferred stock not subscribed for in the Rights Offering by stockholders other than affiliates of Onex at the Series A Price per share. As a result of the Initial Private Placement and the Onex Backstop, the Company sold 69,718,919 shares of redeemable convertible preferred stock to Onex in exchange for $ 373.3 million, net of fees and expenses of $ 17.2 million. As a result of the Rights Offering, the Company issued 1,727,427 shares of redeemable convertible preferred stock in exchange for $ 9.7 million. Liquidation Preference Upon liquidation or dissolution of the Company, the holders of redeemable convertible preferred stock are entitled to receive the greater of (a) the accreted liquidation preference, and (b) the amount the holders of redeemable convertible preferred stock would have received if they had converted their redeemable convertible preferred stock into common stock immediately prior to such liquidation or dissolution. Dividends Each share of redeemable convertible preferred stock will accumulate dividends at a rate per annum equal to 7 % of the accreted liquidation preference, compounding quarterly by adding to the accreted liquidation preference until July 1, 2023 and thereafter, at the Company’s option, paid either in cash or by adding to the accreted liquidation preference. During the three and six months ended June 30, 2023 , the Company recorded accretion of $ 8.4 million and $ 16.7 million, respectively, bringing the aggregate liquidation preference to $ 492.6 million as of June 30, 2023. During the three and six months ended June 30, 2022 , the Company recorded accretion of $ 7.8 million and $ 15.6 million, respectively, bringing the aggregate liquidation preference to $ 459.7 million as of June 30, 2022 . There were no dividends declared or paid in the first and second quarters of 2023 or 2022 . Holders of redeemable convertible preferred stock are also entitled to participate in and receive any dividends declared or paid on the Company’s common stock on an as-converted basis, and no dividends may be paid to holders of common stock unless the aggregate accreted liquidation preference on the redeemable convertible preferred stock has been paid or holders of a majority of the outstanding redeemable convertible preferred stock have consented to such dividends. Conversion Features Shares of the redeemable convertible preferred stock may be converted at the option of the holder into a number of shares of common stock equal to (a) the amount of the accreted liquidation preference, divided by (b) the applicable conversion price. Each share of redeemable convertible preferred stock had an initial liquidation preference of $ 5.60 and were initially convertible into approximately 1.59 shares of common stock, which is equivalent to the initial liquidation preference per share of $ 5.60 divided by the initial conversion price of $ 3.52 per share. The conversion price is subject to customary anti-dilution adjustments upon the occurrence of certain events, including downward adjustment in the event the Company issues securities, subject to exceptions, at a price that is lower than the fair market value of such securities. If, at any time following the third anniversary of the First Closing Date the closing price per share of the Company’s common stock exceeds 175 % of the then-applicable conversion price for at least 20 consecutive trading days, the Company may, at its option, and subject to certain liquidity conditions, cause any or all of the then outstanding shares of redeemable convertible preferred stock to be converted automatically into common stock at the then applicable conversion price. Redemption Features The Company has the right to redeem all, but not less than all, of the redeemable convertible preferred stock on or after June 29, 2026 for a cash purchase price equal to (a) on or after the six-year anniversary thereof, 105 % of the accreted liquidation preference, (b) on or after the seven-year anniversary thereof, 103 % of the accreted liquidation preference or (c) on or after the eight-year anniversary thereof, the accreted liquidation preference. In addition, if there is a change of control transaction involving the Company prior to the six-year anniversary of the First Closing Date, the Company has the right to redeem all, but not less than all, of the redeemable convertible preferred stock for a cash purchase price equal to the accreted liquidation preference plus the net present value of the additional amount by which the accreted liquidation preference would have otherwise increased from the date of such redemption through the sixth anniversary of the closing. If, after the Company ceases to have a controlling stockholder group, there is a change of control transaction involving the Company, holders of redeemable convertible preferred stock may elect to (x) convert their redeemable convertible preferred stock into shares of common stock at the then current conversion price or (y) require the Company to redeem the redeemable convertible preferred stock for cash, at a price per share equal to the then-unpaid accreted liquidation preference. Although only Unaffiliated Directors (as defined below) can be involved in any decisions with respect to the Company’s rights to exercise the redemption features, the holders of the redeemable convertible preferred stock control the majority of the votes through representation on the board of directors. Therefore, the redeemable convertible preferred stock is required to be accreted to its redemption price on the date the redemption option first becomes exercisable. For the three months ended June 30, 2023 and 2022, the Company recorded $ 10.4 million and $ 9.6 million in deemed dividends, respectively, and for the six months ended June 30, 2023 and 2022, the Company recorded $ 20.5 million and $ 18.8 million in deemed dividends, respectively, representing the accretion of the redeemable convertible preferred stock to the redemption value. Voting Rights Certain matters will require the approval of holders of a majority of the redeemable convertible preferred stock, including (i) amendments to the Company’s organizational documents in a manner adverse to the redeemable convertible preferred stock, (ii) the creation or issuance of senior or parity equity securities or (iii) the issuance of any convertible indebtedness, other class of redeemable convertible preferred stock or other equity securities in each case with rights to payments or distributions in which the redeemable convertible preferred stock would not participate on a pro-rata, as-converted basis. In addition, for so long as the redeemable convertible preferred stock represents more than 30 % of the outstanding common stock on an as-converted basis, without the approval of a majority of the directors elected by the holders of the redeemable convertible preferred stock, the Company may not (i) incur new indebtedness to the extent certain financial metrics are not satisfied, (ii) redeem or repurchase any equity securities junior to the redeemable convertible preferred stock, (iii) enter into any agreement for the acquisition or disposition of assets or businesses involving a purchase price in excess of $ 100 million, (iv) hire or terminate the chief executive officer of the Company or (v) make a voluntary filing for bankruptcy or commence a dissolution of the Company. For so long as the redeemable convertible preferred stock represents a minimum percentage of the outstanding shares of common stock on an as-converted basis as set forth in the Certificate of Designations relating to the redeemable convertible preferred stock, the holders of the redeemable convertible preferred stock shall have the right to appoint up to five members of the Company’s Board of Directors (the “Board”). All decisions of the Company’s Board with respect to the exercise or waiver of the Company’s rights relating to the redeemable convertible preferred stock shall be determined by a majority of the Company’s directors that are not employees of the Company or affiliated with Onex (“Unaffiliated Directors”), or a committee of Unaffiliated Directors. As part of the transactions contemplated by the Investment Agreement, the Company and Onex entered into a Registration Rights Agreement whereby Onex is entitled to certain demand and piggyback registration rights in respect of the redeemable convertible preferred stock and the shares of common stock issuable upon conversion thereof. Dividends There were no dividends paid or declared during the first or second quarters of 2023 and 2022. Share Repurchases October 2020 Share Repurchase Program (“October 2020 Share Repurchase Program”) In October 2020, the Company’s Board authorized and approved a $ 20.0 million share repurchase program. Under the terms of the October 2020 Share Repurchase Program, the Company may, from time to time, purchase shares of its common stock for an aggregate purchase price not to exceed $ 20.0 million through December 31, 2021, subject to early termination or extension by the Board. In October 2021, the Company’s Board approved the extension and expansion of the October 2020 Share Repurchase Program, which allowed for the repurchase of an additional $ 20.0 million of the Company's common stock through December 31, 2022. The Company repurchased 982,622 shares and 1,238,206 shares for $ 3.4 million and $ 4.3 million during the three and six months ended June 30, 2022, respectively, under this repurchase program. October 2022 Share Repurchase Program Extension and Expansion On October 26, 2022, the Company's Board approved an extension and expansion of its share repurchase program, which allows for the repurchase of $ 20.0 million of the Company's common stock through December 31, 2023, subject to early termination or extension by the Board. The Company repurchased zero shares and 5,064,140 shares for $ 16.9 million during the three and six months ended June 30, 2023 , respectively, under this repurchase program. There was $ 3.0 million remaining available for share repurchases under the October 2022 Share Repurchase Program as of June 30, 2023 . The share repurchase program may be suspended or discontinued at any time without notice.

Stock-Based Compensation

Stock-Based Compensation	6 Months Ended
	Jun. 30, 2023
Share-Based Payment Arrangement [Abstract]
Stock-Based Compensation	10. Stock-Based Compensation The Company recognizes cumulative stock-based compensation expense for the portion of the awards for which the service period is probable of being satisfied. Stock-based compensation expense is included in selling, general and administrative expense in the condensed consolidated statements of (loss) income and comprehensive (loss) income. The related deferred tax benefit for stock-based compensation recognized was $ 0.5 million and $ 1.0 million for the three and six months ended June 30, 2023 , respectively. The related deferred tax benefit for stock-based compensation recognized was $ 0.4 million and $ 1.0 million for the three and six months ended June 30, 2022, respectively. 2019 Employee Stock Purchase Plan (the “ESPP”) In January 2019, the Board approved the ESPP, which was approved by the Company’s stockholders in May 2019. The ESPP requires that participating employees must be employed for at least 20 hours per week, have completed at least 6 months of service, and have compensation (as defined in the ESPP) not greater than $ 150,000 in the 12-month period before the enrollment date to be eligible to participate in the ESPP. Under the ESPP, eligible employees will receive a 10 % discount from the lesser of the closing price on the first day of the offering period and the closing price on the purchase date. The Company reserved 500,000 shares of its common stock for issuance under the ESPP. The ESPP expense recognized by the Company was no t material for the three and six months ended June 30, 2023 and 2022. Stock Options The Company recognized stock-based compensation expense relating to stock option activity of $ 1.6 million and $ 3.1 million for the three and six months ended June 30, 2023 , respectively. The Company recognized stock-based compensation expense relating to stock option activity of $ 0.9 million and $ 2.2 million for the three and six months ended June 30, 2022, respectively. Stock option activity for the six months ended June 30, 2023, was as follows: Weighted-Average Number of Exercise Price Remaining (thousands) (years) Outstanding at December 31, 2022 14,555 $ 7.90 7.1 Granted 7,146 3.81 Exercised ( 1 ) 2.87 Forfeited/Expired ( 845 ) 10.67 Outstanding at June 30, 2023 20,855 $ 6.39 7.8 Exercisable at June 30, 2023 6,657 $ 9.22 6.0 There was a total of $ 16.1 million unrecognized stock-based compensation expense at June 30, 2023 related to unvested stock options expected to be recognized over a weighted-average period of 3.04 years. Restricted Stock Units (“RSUs”) The Company grants RSUs that contain service conditions to certain executives and employees. The Company recognizes cumulative stock-based compensation expense for the portion of the awards for which the service period is probable of being satisfied. Stock-based compensation expense relating to RSU activity recognized in the three and six months ended June 30, 2023 was $ 0.2 million and $ 0.7 million, respectively. Stock-based compensation expense relating to RSU activity recognized in the three and six months ended June 30, 2022 was $ 0.6 million and $ 1.4 million, respectively. There was a total of $ 1.4 million of unrecognized stock-based compensation expense at June 30, 2023 related to unvested RSUs expected to be recognized over a weighted-average period of 1.7 years. RSU activity for the six months ended June 30, 2023, was as follows: (share data in thousands, except per share data) Number of Weighted Unvested balance, December 31, 2022 878 $ 6.87 Granted 115 3.93 Forfeited ( 13 ) 10.08 Vested ( 416 ) 7.03 Unvested balance, June 30, 2023 564 $ 6.06 Market-based Share Awards In January 2020, the Company granted performance-based market condition share awards to one senior executive under the 2017 Omnibus Equity Plan, which entitle this employee the right to receive shares of common stock equal to a maximum value of $ 4.9 million in the aggregate, upon achievement of specified targeted share prices measured over sixty days within a ninety-day trading period. In June 2019, the Company granted performance-based market condition share awards to one senior executive under the 2017 Omnibus Equity Plan, which entitle this employee the right to receive shares of common stock equal to a maximum value of $ 4.9 million, in the aggregate, upon achievement of specified targeted share prices measured over sixty days within a ninety-day trading period. As of June 30, 2023 , all outstanding performance-based market condition share awards remain unvested with an estimated weighted average conversion threshold of $ 21.08 per share, which would result in an estimated 78,041 shares of common stock to be issued upon vesting. Each of the estimated 78,041 shares of common stock have a weighted-average grant date fair value of $ 24.77 per share. As of June 30, 2023 and December 31, 2022, the liability for these awards was $ 0.5 million and $ 0.4 million, respectively, and is reported on the condensed consolidated balance sheets in other noncurrent liabilities. The fair value of performance-based market condition share awards is estimated on the grant date using a risk-neutral Monte Carlo simulation model. The grant date fair value of the remaining outstanding awards granted in 2019 was $ 0.8 million. The grant date fair value of the 2020 awards was $ 1.1 million. The Company recognized stock-based compensation expense relating to performance-based market condition share awards of $ 0.1 million for the three and six months ended June 30, 2023 . The Company recognized stock-based compensation expense relating to performance-based market condition share awards of $ 0.1 million for the three and six months ended June 30, 2022. The assumptions used in determining the fair value for the performance-based market condition share awards outstanding at June 30, 2023 were as follows: June 30, Expected volatility 63.4 % Dividend yield 0.0 % Risk-free interest rate 4.0 % Weighted-average expected term (in years) 6.8 The weighted-average expected term of the Company’s performance-based market condition share awards is the weighted-average of the derived service periods for the share awards.

Earnings Per Share

Earnings Per Share	6 Months Ended
	Jun. 30, 2023
Earnings Per Share [Abstract]
Earnings Per Share	11. Earnings Per Share Basic earnings per share is computed using the weighted-average number of common shares outstanding during the period. Diluted earnings per share is computed using the weighted-average number of common shares outstanding during the period, plus the dilutive effect of outstanding options, using the treasury stock method and the average market price of the Company's common stock during the applicable period. Certain shares related to some of the Company's outstanding employee share awards were excluded from the computation of diluted earnings per share because they were antidilutive in the periods presented but could be dilutive in the future. Performance-based market condition share awards are considered contingently issuable shares, which would be included in the denominator for earnings per share if the applicable market conditions have been achieved, and the inclusion of any performance-based market condition share awards is dilutive for the respective reporting periods. For both the three and six months ended June 30, 2023 and 2022, unvested performance-based market condition share awards were excluded from the calculation of diluted earnings per share because the market conditions had not been met. There were 71,402,907 7 % Series A Redeemable Convertible Participating Preferred Stock shares outstanding which were convertible into 139,939,471 shares of common stock at June 30, 2023. These preferred stock shares were anti-dilutive for the three and six months ended June 30, 2023 and are therefore excluded from the diluted loss per common share calculation. The details of the computation of basic and diluted earnings per common share are as follows: Three Months Ended Six Months Ended (dollars in millions, share data in thousands except earnings per share) 2023 2022 2023 2022 Net (loss) income and comprehensive (loss) income $ ( 8.1 ) $ ( 0.7 ) $ ( 1.0 ) $ 15.4 Accretion to redemption value of redeemable ( 10.4 ) ( 9.6 ) ( 20.5 ) ( 18.8 ) Net loss and comprehensive loss $ ( 18.5 ) $ ( 10.3 ) $ ( 21.5 ) $ ( 3.4 ) Weighted average common shares outstanding 62,868 69,816 65,048 70,007 Basic loss per share $ ( 0.29 ) $ ( 0.15 ) $ ( 0.33 ) $ ( 0.05 ) Net loss and comprehensive loss $ ( 18.5 ) $ ( 10.3 ) $ ( 21.5 ) $ ( 3.4 ) Diluted weighted average common shares 62,868 69,816 65,048 70,007 Diluted loss per share $ ( 0.29 ) $ ( 0.15 ) $ ( 0.33 ) $ ( 0.05 ) Anti-dilutive employee share awards excluded 20,847 15,261 20,847 15,219

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2023
Income Tax Disclosure [Abstract]
Income Taxes	12. Income Taxes The Company determines its interim income tax provision by applying the estimated effective income tax rate expected to be applicable for the full fiscal year to the income before income taxes for the period. In determining the full year effective tax rate estimate, the Company does not include the estimated impact of unusual and/or infrequent items, which may cause significant variations in the expected relationship between income tax expense (benefit) and pre-tax income (loss). Significant judgment is exercised in determining the income tax provision due to transactions, credits and estimates where the ultimate tax determination is uncertain. The Company’s U.S. federal statutory corporate income tax rate was 21 % as of June 30, 2023. For the three and six months ended June 30, 2023, the Company recorded a benefit from income taxes of $ 4.4 million and $ 1.7 million , respectively, which resulted in an effective tax rate of 35.2 % and 63.0 % , respectively. The differences between the U.S. federal statutory and effective tax rates before discrete items are primarily attributable to changes in valuation allowances, nondeductible officer compensation and other book to tax differences. For the three and six months ended June 30, 2022, the Company recorded a provision for income taxes of $ 2.9 million and $ 2.1 million , respectively, which resulted in an effective tax rate of 131.8 % and 12.0 % , respectively. Liabilities for unrecognized tax benefits and associated interest and penalties were zero as of June 30, 2023 and December 31, 2022 .

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	13. Commitments and Contingencies Leases and Other Contractual Arrangements The Company has entered into operating leases and other contractual obligations to secure real estate facilities, equipment and trade show venues. These agreements are not unilaterally cancelable by the Company, are legally enforceable and specify fixed or minimum amounts or quantities of goods or services at fixed or minimum prices. Legal Proceedings and Contingencies The Company is subject to litigation and other claims in the ordinary course of business. In the opinion of management, there are no claims, commitments or guarantees pending to which the Company is party that would have a material adverse effect on the condensed consolidated financial statements.

Accounts Payable and Other Curr

Accounts Payable and Other Current Liabilities	6 Months Ended
	Jun. 30, 2023
Payables and Accruals [Abstract]
Accounts Payable and Other Current Liabilities	14. Accounts Payable and Other Current Liabilities Accounts payable and other current liabilities consisted of the following: (in millions) June 30, December 31, Trade payables $ 18.6 $ 20.4 Other current liabilities 8.5 14.7 Accrued event costs 15.0 11.7 Accrued personnel costs 8.1 11.3 Total accounts payable and other $ 50.2 $ 58.1

Segment Information

Segment Information	6 Months Ended
	Jun. 30, 2023
Segment Reporting [Abstract]
Segment Information	15. Segment Information The Company routinely evaluates whether its operating and reportable segments continue to reflect the way the Chief Executive Officer, who is considered the Company’s Chief Operating Decision Maker ("CODM"), evaluates the business. The determination is based on: (1) how the Company’s CODM evaluates the performance of the business, including resource allocation decisions, and (2) whether discrete financial information for each operating segment is available. The Company considers its Chief Executive Officer to be its CODM. The CODM evaluates performance based on the results of seven executive brand portfolios, which represent the Company’s seven operating segments. The brands managed by the Company’s segment managers do not necessarily align with specific industry sectors. Due to economic similarities and the nature of services, fulfillment processes of those services and types of customers, five operating segments are aggregated into two reportable segments, the Commerce and the Design, Creative, and Technology reportable segments. In addition, two operating segments did not meet the quantitative thresholds of a reportable segment and did not meet the aggregation criteria set forth in ASC Topic 280, Segment Reporting . Therefore, results for these operating segments are included in the rows labeled "All Other" in the tables below for all periods presented. Six of the executive portfolios generate revenues through the production of trade show events, including booth space sales, registration fees and sponsorship fees. In addition, these six segments generate revenues from marketing activities, including digital and print media. The seventh operating segment generates revenues from Emerald’s software-as-a-service platform. Operating segment performance is evaluated by the Company’s CODM based on Adjusted EBITDA, a non-GAAP measure, defined as EBITDA exclusive of general corporate expenses, stock-based compensation expense, impairments and other items. These adjustments are primarily related to items that are managed on a consolidated basis at the corporate level. The exclusion of such charges from each segment is consistent with how the CODM evaluates segment performance. The following table presents a reconciliation of reportable segment revenues, other income, net, and Adjusted EBITDA to net (loss) income: Three Months Ended Six Months Ended (in millions) 2023 2022 2023 2022 Revenues Commerce $ 21.1 $ 19.4 $ 91.2 $ 76.0 Design, Creative, and Technology 59.5 47.6 106.1 85.1 All Other 5.9 4.4 11.5 8.8 Total revenues $ 86.5 $ 71.4 $ 208.8 $ 169.9 Other income, net Commerce $ — $ 4.5 $ — $ 5.6 Design, Creative, and Technology — 3.4 — 25.3 All Other — 0.2 — 0.9 Total other income, net $ — $ 8.1 $ — $ 31.8 Adjusted EBITDA Commerce $ 6.5 $ 10.2 $ 45.9 $ 42.0 Design, Creative, and Technology 23.0 21.9 36.1 54.5 All Other ( 1.0 ) ( 2.9 ) ( 1.9 ) ( 5.2 ) Subtotal Adjusted EBITDA $ 28.5 $ 29.2 $ 80.1 $ 91.3 General corporate and other expenses $ ( 13.9 ) $ ( 13.6 ) $ ( 29.0 ) $ ( 26.4 ) Interest expense, net ( 9.1 ) ( 4.6 ) ( 16.0 ) ( 8.5 ) Loss on extinguishment of debt ( 2.3 ) — ( 2.3 ) — Goodwill impairment charge — — — ( 6.3 ) Intangible asset impairment charge — — — ( 1.6 ) Depreciation and amortization expense ( 12.9 ) ( 14.0 ) ( 26.4 ) ( 28.3 ) Stock-based compensation expense ( 1.9 ) ( 1.6 ) ( 4.0 ) ( 3.7 ) Deferred revenue adjustment — ( 0.2 ) — ( 0.4 ) Other items ( 0.9 ) 7.0 ( 5.1 ) 1.4 (Loss) income before income taxes $ ( 12.5 ) $ 2.2 $ ( 2.7 ) $ 17.5 The Company’s CODM does not receive information with a measure of total assets or capital expenditures for each operating segment as this information is not used for the evaluation of executive brand portfolio performance as the Company’s operations are not capital intensive. Capital expenditure information is provided to the CODM on a consolidated basis. Therefore, the Company has not provided asset and capital expenditure information by reportable segment. Intersegment revenues were immaterial for the three months ended June 30, 2023 and 2022. For the three months ended June 30, 2023 and 2022 , substantially all revenues were derived from transactions in the United States.

Related Party Transactions

Related Party Transactions	6 Months Ended
	Jun. 30, 2023
Related Party Transactions [Abstract]
Related Party Transactions	16. Related Party Transactions Investment funds affiliated with Onex Corporation owned approximately 90.7 % of the Company’s common stock on an as-converted basis as of June 30, 2023 . Affiliates of Onex Corporation held a 48.0 % ownership position in ASM Global (“ASM”), including SMG Food & Beverage, LLC, a wholly-owned subsidiary of ASM, which the Company has contracted with for catering services at certain of the Company’s trade shows and events, and a 96.0 % ownership position in Convex Group Ltd. (“Convex”), which is one of the insurers in the syndicate that provides the Company’s insurance coverage. Additionally, certain of the Company’s future tradeshows and other events may be held at facilities managed by ASM. During three and six months ended June 30, 2023, two and six shows were staged at ASM-managed venues, respectively. During three and six months ended June 30, 2022 , two and six shows were staged at ASM-managed venues, respectively. The Company paid to ASM aggregate fees, inclusive of certain concessions, equal to $ 0.4 million and $ 0.7 million during the three and six months ended June 30, 2023 , respectively. The Company paid to ASM aggregate fees, inclusive of certain concessions, equal to $ 0.5 million and $ 0.8 million during the three and six months ended June 30, 2022 , respectively. The Company had $ 0.1 million and zero fees due to ASM as of June 30, 2023 and December 31, 2022 , respectively. The Company made payments of $ 0.2 million to Convex during the three and six months ended June 30, 2023 . The Company made payments of $ 0.2 million and $ 0.5 million to Convex during the three and six months ended June 30, 2022 , respectively. The Company had no accounts payable due to Convex as of June 30, 2023 and December 31, 2022 , respectively.

Basis of Presentation (Policies

Basis of Presentation (Policies)	6 Months Ended
	Jun. 30, 2023
Accounting Policies [Abstract]
Basis of Presentation	1. Basis of Presentation The unaudited condensed consolidated financial statements include the operations of Emerald Holding, Inc. (the “Company” or “Emerald”) and its wholly-owned subsidiaries. These unaudited condensed consolidated financial statements are presented in conformity with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X of the SEC for Interim Reporting. All intercompany transactions, accounts and profits/losses, if any, have been eliminated in the unaudited condensed consolidated financial statements. In the opinion of management, all recurring adjustments considered necessary for a fair statement of results for the interim period have been included. These unaudited condensed consolidated financial statements do not include all disclosures required by GAAP, therefore, these unaudited condensed consolidated financial statements should be read in conjunction with the more detailed audited consolidated financial statements for the year ended December 31, 2022. The December 31, 2022 condensed consolidated balance sheet was derived from the Company’s audited consolidated financial statements for the year ended December 31, 2022. Certain reclassifications have been made to prior year amounts to conform to the current year's presentation. The results for the three and six months ended June 30, 2023 are not necessarily indicative of results to be expected for a full year, any other interim periods or any future year or period.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements There have been no new accounting pronouncements that are expected to have a significant impact on the Company’s condensed consolidated financial statements or notes thereto.
Revenue Recognition and Deferred Revenue	Revenue Recognition and Deferred Revenue Revenue is recognized as the customer receives the benefit of the promised services and performance obligations are satisfied. Revenue is recognized at an amount that reflects the consideration the Company expects to receive in exchange for those services. Customers generally receive the benefit of the Company’s services upon the staging of each trade show or conference event and over the subscription period for access to the Company’s subscription software and services. Fees are typically invoiced and collected in full prior to the trade show or event. A significant portion of the Company’s annual revenue is generated from the production of trade shows and conferences (collectively, “trade shows”), including booth space sales, registration fees and sponsorship fees. The Company recognizes revenue in the period the trade show occurs. Trade show and other events revenues represented approximately 86.4 % and 83.8 % of total revenues for the three months ended June 30, 2023 and 2022, respectively. Trade show and other events revenues represented approximately 89.1 % and 86.8 % of total revenues for the six months ended June 30, 2023 and 2022, respectively. Deferred revenues generally consist of booth space sales, registration fees and sponsorship fees that are invoiced prior to a trade show, as well as upfront payments for software subscription fees, professional services and implementation fees for the Company’s subscription software and services. Current deferred revenues were $ 162.4 million as of June 30, 2023 and are reported as deferred revenues on the condensed consolidated balance sheets. Long-term deferred revenues as of June 30, 2023 were $ 1.2 million and are reported as other noncurrent liabilities on the condensed consolidated balance sheets. Current and long-term deferred revenues as of December 31, 2022 were $ 151.2 million and $ 1.4 million, respectively. During the three and six months ended June 30, 2023 , the Company recognized revenues of $ 72.6 million and $ 182.6 million, respectively, from amounts included in deferred revenue at the beginning of the respective period. During the three and six months ended June 30, 2022 , the Company recognized revenues of $ 59.3 million and $ 144.0 million, respectively, from amounts included in deferred revenue at the beginning of the respective period. The accounts receivable and deferred revenue balances related to cancelled events are classified as cancelled event liabilities in the condensed consolidated balance sheets as the total amount represents balances which are expected to be refunded to customers. As of June 30, 2023, cancelled event liabilities of $ 2.7 million represents $ 0.7 million of deferred revenues for cancelled trade shows and $ 2.0 million of related accounts receivable credits reclassified to cancelled event liabilities in the condensed consolidated balance sheets. As of December 31, 2022, cancelled event liabilities of $ 3.3 million represented $ 0.8 million of deferred revenues for cancelled trade shows and $ 2.5 million of related accounts receivable credits reclassified to cancelled event liabilities in the condensed consolidated balance sheets. Performance Obligations For the Company’s trade shows and other events, sales are deferred and recognized when performance obligations under the terms of a contract with the Company’s customers are satisfied, which is typically at the completion of a show or event. Revenue is measured as the amount of consideration the Company expects to receive upon completion of its performance obligations. For the Company’s subscription software and services, the Company may enter into contracts with customers that may include multiple performance obligations, which are generally capable of being distinct. Fees associated with implementation and related professional services are deferred and recognized over the expected customer life, which is four years . Subscription revenue is recognized over the term of the contract. The Company’s contracts associated with the subscription software and services are typically three-year terms with one-year renewals following the initial three-year term. For the Company’s other marketing services, revenues are deferred and recognized when performance obligations under the terms of a contract with the Company’s customers are satisfied. This generally occurs in the period in which the publications are issued. Revenue is measured as the amount of consideration the Company expects to receive upon completion of its performance obligations. The Company applies a practical expedient which allows the exclusion of disclosure information regarding remaining performance obligations if the performance obligation is part of a contract that has an expected duration of one year or less. The Company’s performance obligations greater than one year are immaterial. Disaggregation of Revenue The Company’s primary sources of revenue are from trade shows, other events, subscription software and services and other marketing services. The following table represents revenues disaggregated by type: Reportable Segment Commerce Design, All Other Total Three Months Ended June 30, 2023 (in millions) Trade shows $ 16.2 $ 37.7 $ 1.2 $ 55.1 Other events 3.6 16.0 — 19.6 Subscription software and services — 0.6 4.7 5.3 Other marketing services 1.3 5.2 — 6.5 Total revenues $ 21.1 $ 59.5 $ 5.9 $ 86.5 Three Months Ended June 30, 2022 Trade shows $ 17.7 $ 31.9 $ 0.9 $ 50.5 Other events — 9.3 — 9.3 Subscription software and services — 0.8 3.5 4.3 Other marketing services 1.7 5.6 — 7.3 Total revenues $ 19.4 $ 47.6 $ 4.4 $ 71.4 Six Months Ended June 30, 2023 Trade shows $ 84.3 $ 65.6 $ 2.3 $ 152.2 Other events 3.8 30.0 — 33.8 Subscription software and services 0.1 1.2 9.2 10.5 Other marketing services 3.0 9.3 — 12.3 Total revenues $ 91.2 $ 106.1 $ 11.5 $ 208.8 Six Months Ended June 30, 2022 Trade shows $ 71.8 $ 55.4 $ 1.9 $ 129.1 Other events 0.5 17.9 — 18.4 Subscription software and services — 1.6 6.9 8.5 Other marketing services 3.7 10.2 — 13.9 Total revenues $ 76.0 $ 85.1 $ 8.8 $ 169.9 Contract Balances The Company’s contract assets are primarily sales commissions incurred in connection with the Company’s subscription software and services, which are expensed over the expected customer relationship period. As of June 30, 2023, the Company does not have material contract assets. Contract liabilities generally consist of booth space sales, registration fees, sponsorship fees that are collected prior to the trade show or other event and subscription revenue, implementation fees and professional services associated with the Company’s subscription software and services. Contract liabilities less than one year from the date of the performance obligation are reported on the condensed consolidated balance sheets as deferred revenues. Contract liabilities greater than one year from the date of the performance obligation are reported on the condensed consolidated balance sheets in other noncurrent liabilities. The Company’s sales commission costs incurred in connection with sales of booth space, registration fees and sponsorship fees at the Company’s trade shows and other events and with sales of advertising for industry publications are generally short term, as sales typically begin up to one year prior to the date of the trade shows and other events. The Company expects the period benefited by each commission to be less than one year , and as a result, the Company expenses sales commissions associated with trade shows, other events and other marketing services as incurred. Sales commissions are reported on the condensed consolidated statements of (loss) income and comprehensive (loss) income as selling, general and administrative expense. Accounts Receivable The Company monitors collections and payments from its customers and maintains an allowance based upon applying an expected credit loss rate to receivables based on the historical loss rate from similar customers adjusted for current conditions, including any specific customer collection issues identified, and forecasts of economic conditions. Delinquent account balances are written off after management has determined that the likelihood of collection is remote. The activities in this account, including the current-period provision for expected credit losses for the three and six months ended June 30, 2023 and 2022 , were not material.

Revenues (Tables)

Revenues (Tables)	6 Months Ended
	Jun. 30, 2023
Revenue from Contract with Customer [Abstract]
Summary of Revenues Disaggregated	The following table represents revenues disaggregated by type: Reportable Segment Commerce Design, All Other Total Three Months Ended June 30, 2023 (in millions) Trade shows $ 16.2 $ 37.7 $ 1.2 $ 55.1 Other events 3.6 16.0 — 19.6 Subscription software and services — 0.6 4.7 5.3 Other marketing services 1.3 5.2 — 6.5 Total revenues $ 21.1 $ 59.5 $ 5.9 $ 86.5 Three Months Ended June 30, 2022 Trade shows $ 17.7 $ 31.9 $ 0.9 $ 50.5 Other events — 9.3 — 9.3 Subscription software and services — 0.8 3.5 4.3 Other marketing services 1.7 5.6 — 7.3 Total revenues $ 19.4 $ 47.6 $ 4.4 $ 71.4 Six Months Ended June 30, 2023 Trade shows $ 84.3 $ 65.6 $ 2.3 $ 152.2 Other events 3.8 30.0 — 33.8 Subscription software and services 0.1 1.2 9.2 10.5 Other marketing services 3.0 9.3 — 12.3 Total revenues $ 91.2 $ 106.1 $ 11.5 $ 208.8 Six Months Ended June 30, 2022 Trade shows $ 71.8 $ 55.4 $ 1.9 $ 129.1 Other events 0.5 17.9 — 18.4 Subscription software and services — 1.6 6.9 8.5 Other marketing services 3.7 10.2 — 13.9 Total revenues $ 76.0 $ 85.1 $ 8.8 $ 169.9

Business Acquisitions (Tables)

Business Acquisitions (Tables)	6 Months Ended
	Jun. 30, 2023
Schedule of Supplemental Pro-Forma Information	Supplemental information on an unaudited pro-forma basis is reflected as if the 2022 and 2023 acquisitions had occurred at the beginning of 2022, after giving effect to certain pro-forma adjustments primarily related to the amortization of acquired intangible assets and interest expense. The unaudited pro-forma supplemental information is based on estimates and assumptions that the Company believes are reasonable and reflects amortization of intangible assets as a result of the acquisition. The supplemental unaudited pro-forma financial information is presented for comparative purposes only. It is not necessarily indicative of what the Company’s financial position or results of operations actually would have been had the Company completed the acquisition at the dates indicated, nor is it intended to project the future financial position or operating results of the combined Company. Further, the supplemental pro-forma information has not been adjusted for show timing differences or discontinued events. Three Months Ended Six Months Ended 2022 2022 (in millions) (Unaudited) Pro-forma revenues (1) Advertising Week $ 5.3 $ 5.5 Lodestone 2.8 2.8 Emerald revenue 71.4 169.9 Total pro-forma revenues $ 79.5 $ 178.2 Pro-forma net (loss) income Advertising Week $ — $ ( 0.6 ) Bulletin ( 1.1 ) ( 2.2 ) Lodestone 0.6 0.1 Emerald net (loss) income ( 0.7 ) 15.4 Total pro-forma net (loss) income $ ( 1.2 ) $ 12.7 (1) Pro-forma revenues from the Bulletin acquisition were not material to the three and six months ended June 30, 2022.
Lodestone [Member]
Summary of Purchase Price Allocation and Measurement Period Adjustment	The following table summarizes the fair value of the acquired assets and liabilities on the acquisition date: (in millions) January 9, Trade and other receivables $ 1.8 Prepaid expenses and other current assets 0.2 Goodwill 8.4 Intangible assets 3.4 Deferred revenues ( 3.6 ) Purchase price, including working capital adjustment $ 10.2

Property and Equipment (Tables)

Property and Equipment (Tables)	6 Months Ended
	Jun. 30, 2023
Property, Plant and Equipment [Abstract]
Summary of Property and Equipment, Net	Property and equipment, net, consisted of the following: (in millions) June 30, December 31, Furniture, equipment and other $ 5.1 $ 4.8 Leasehold improvements 1.0 1.0 6.1 5.8 Less: Accumulated depreciation ( 4.2 ) ( 3.6 ) Property and equipment, net $ 1.9 $ 2.2

Intangible Assets and Goodwill

Intangible Assets and Goodwill (Tables)	6 Months Ended
	Jun. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Intangible Assets, Net	Intangible assets, net consisted of the following: (in millions) Indefinite- Customer Definite- Acquired Acquired Computer Capitalized Total Gross carrying $ 52.6 $ 365.4 $ 91.1 $ 8.4 $ 2.6 $ 32.3 $ 1.1 $ 553.5 Accumulated — ( 326.2 ) ( 19.9 ) ( 2.9 ) ( 0.8 ) ( 15.6 ) — ( 365.4 ) Net carrying $ 52.6 $ 39.2 $ 71.2 $ 5.5 $ 1.8 $ 16.7 $ 1.1 $ 188.1 Gross carrying $ 52.6 $ 363.1 $ 90.0 $ 8.4 $ 2.6 $ 25.5 $ 2.1 $ 544.3 Accumulated — ( 306.2 ) ( 17.2 ) ( 2.2 ) ( 0.6 ) ( 13.3 ) — ( 339.5 ) Net carrying $ 52.6 $ 56.9 $ 72.8 $ 6.2 $ 2.0 $ 12.2 $ 2.1 $ 204.8
Schedule of Changes in Carrying Amount of Goodwill	The table below summarizes the changes in the carrying amount of goodwill for each reportable segment: Reportable Segment (in millions) Commerce Design, All Other Total Balance at December 31, 2022 $ 356.1 $ 160.8 $ 28.6 $ 545.5 Acquired goodwill 8.4 — — 8.4 Balance at June 30, 2023 $ 364.5 $ 160.8 $ 28.6 $ 553.9

Debt (Tables)

Debt (Tables)	6 Months Ended
	Jun. 30, 2023
Debt Disclosure [Abstract]
Summary of Long-Term Debt	Debt is comprised of the following indebtedness to various lenders: (in millions) June 30, December 31, Extended Term Loan Facility, with 5.10 as of June 30, 2023, 10.20 % at June 30, 2023) due 2026 , net (a) $ 403.1 $ — Amended and Restated Term Loan Facility, with 2.50 as of December 31, 2022 6.57 % at December 31, 2022) due 2024 , net (b) — 413.9 Less: Current maturities 4.2 — Long-term debt, net of debt discount $ 398.9 $ 413.9 (a) The Extended Term Loan Facility (as defined below), scheduled to mature on May 22, 2026 , was recorded net of unamortized discount of $ 10.5 million and net of unamortized deferred financing fees of $ 1.7 million as of June 30, 2023 . The fair market value of the Company’s debt under the Extended Term Loan Facility was $ 404.4 million as of June 30, 2023. (b) The Amended and Restated Term Loan Facility (as defined below) as of December 31, 2022 was recorded net of unamortized discount of $ 0.6 million and net of unamortized deferred financing fees of $ 0.8 million.
Summary of Interest Expense	Interest expense reported in the condensed consolidated statements of (loss) income and comprehensive (loss) income consists of the following: Three Months Ended Six Months Ended (in millions) 2023 2022 2023 2022 Extended Term Loan Facility $ 2.2 $ — $ 2.2 $ — Amended and Restated Term Loan Facility 6.4 4.3 13.9 7.8 Term Loan Amendment third party fees 2.1 — 2.1 — Non-cash interest for amortization of debt discount 0.5 0.3 0.9 0.6 Revolving credit facility interest and commitment fees 0.2 0.2 0.3 0.3 Total interest expense $ 11.4 $ 4.8 $ 19.4 $ 8.7

Fair Value Measurements and F_2

Fair Value Measurements and Financial Risk (Tables)	6 Months Ended
	Jun. 30, 2023
Fair Value Disclosures [Abstract]
Financial Assets and Liabilities Measured at Fair Value on Recurring Basis	As of June 30, 2023, the Company’s assets and liabilities measured at fair value on a recurring basis are categorized in the table below: (in millions) Total Level 1 Level 2 Level 3 Assets Cash and cash equivalents $ 97.2 $ 97.2 $ — $ — Money market mutual funds (a) 107.5 107.5 — — Total assets at fair value $ 204.7 $ 204.7 $ — $ — Liabilities Market-based share awards liability (b) $ 0.5 $ — $ — $ 0.5 Contingent consideration (b) 8.7 — — 8.7 Total liabilities at fair value $ 9.2 $ — $ — $ 9.2 (a) The Company’s money market mutual funds of $ 107.5 million as of June 30, 2023 are included within cash and cash equivalents in the condensed consolidated balance sheets. The money market mutual funds are traded in active markets and quoted in broker or dealer quotations and are classified as Level 1 assets. The fair value of the Company’s money market mutual funds is based on unadjusted quoted prices on the reporting date. (b) The market-based share awards liability of $ 0.5 million as of June 30, 2023 is included within other noncurrent liabilities in the condensed consolidated balance sheet. The fair value of the Company’s market-based share awards and contingent consideration are derived from valuation techniques in which one or more significant inputs are unobservable, including the Company’s own assumptions. Contingent consideration of $ 0.5 million as of June 30, 2023 is included within contingent consideration in the condensed consolidated balance sheets and contingent consideration of $ 8.2 million is included within other noncurrent liabilities in the condensed consolidated balance sheets. As of December 31, 2022, the Company’s assets and liabilities measured at fair value on a recurring basis are categorized in the table below: (in millions) Total Level 1 Level 2 Level 3 Assets Cash and cash equivalents $ 147.5 $ 147.5 $ — $ — Money market mutual funds (a) 91.6 91.6 — — Total assets at fair value $ 239.1 $ 239.1 $ — $ — Liabilities Market-based share awards liability (b) $ 0.4 $ — $ — $ 0.4 Contingent consideration (b) 12.3 — — 12.3 Total liabilities at fair value $ 12.7 $ — $ — $ 12.7 (a) The Company’s money market mutual funds are based on the closing price of these assets as of the reporting date. The fair value of the Company’s money market mutual funds is based on unadjusted quoted prices on the reporting date. The Company’s money market mutual funds are quoted in an active market and classified as Level 1 assets. (b) The fair value of the Company’s market-based share awards and contingent consideration are derived from valuation techniques in which one or more significant inputs are unobservable, including the Company’s own assumptions.

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2023
Share-Based Payment Arrangement [Abstract]
Schedule of Stock Option Activity	Stock option activity for the six months ended June 30, 2023, was as follows: Weighted-Average Number of Exercise Price Remaining (thousands) (years) Outstanding at December 31, 2022 14,555 $ 7.90 7.1 Granted 7,146 3.81 Exercised ( 1 ) 2.87 Forfeited/Expired ( 845 ) 10.67 Outstanding at June 30, 2023 20,855 $ 6.39 7.8 Exercisable at June 30, 2023 6,657 $ 9.22 6.0
Schedule of Restricted Stock Units Activity	RSU activity for the six months ended June 30, 2023, was as follows: (share data in thousands, except per share data) Number of Weighted Unvested balance, December 31, 2022 878 $ 6.87 Granted 115 3.93 Forfeited ( 13 ) 10.08 Vested ( 416 ) 7.03 Unvested balance, June 30, 2023 564 $ 6.06
Schedule of Assumptions Used in Determining Fair Value Performance-based Market Condition Share Awards Outstanding	The assumptions used in determining the fair value for the performance-based market condition share awards outstanding at June 30, 2023 were as follows: June 30, Expected volatility 63.4 % Dividend yield 0.0 % Risk-free interest rate 4.0 % Weighted-average expected term (in years) 6.8

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2023
Earnings Per Share [Abstract]
Computation of Basic and Diluted Earnings Per Common Share	The details of the computation of basic and diluted earnings per common share are as follows: Three Months Ended Six Months Ended (dollars in millions, share data in thousands except earnings per share) 2023 2022 2023 2022 Net (loss) income and comprehensive (loss) income $ ( 8.1 ) $ ( 0.7 ) $ ( 1.0 ) $ 15.4 Accretion to redemption value of redeemable ( 10.4 ) ( 9.6 ) ( 20.5 ) ( 18.8 ) Net loss and comprehensive loss $ ( 18.5 ) $ ( 10.3 ) $ ( 21.5 ) $ ( 3.4 ) Weighted average common shares outstanding 62,868 69,816 65,048 70,007 Basic loss per share $ ( 0.29 ) $ ( 0.15 ) $ ( 0.33 ) $ ( 0.05 ) Net loss and comprehensive loss $ ( 18.5 ) $ ( 10.3 ) $ ( 21.5 ) $ ( 3.4 ) Diluted weighted average common shares 62,868 69,816 65,048 70,007 Diluted loss per share $ ( 0.29 ) $ ( 0.15 ) $ ( 0.33 ) $ ( 0.05 ) Anti-dilutive employee share awards excluded 20,847 15,261 20,847 15,219

Accounts Payable and Other Cu_2

Accounts Payable and Other Current Liabilities (Tables)	6 Months Ended
	Jun. 30, 2023
Payables and Accruals [Abstract]
Schedule of Accounts Payable and Other Current Liabilities	Accounts payable and other current liabilities consisted of the following: (in millions) June 30, December 31, Trade payables $ 18.6 $ 20.4 Other current liabilities 8.5 14.7 Accrued event costs 15.0 11.7 Accrued personnel costs 8.1 11.3 Total accounts payable and other $ 50.2 $ 58.1

Segment Information (Tables)

Segment Information (Tables)	6 Months Ended
	Jun. 30, 2023
Segment Reporting [Abstract]
Reconciliation of Reportable Segment Revenues, Other Income, Net, and Adjusted EBITDA to Net (Loss) Income	The following table presents a reconciliation of reportable segment revenues, other income, net, and Adjusted EBITDA to net (loss) income: Three Months Ended Six Months Ended (in millions) 2023 2022 2023 2022 Revenues Commerce $ 21.1 $ 19.4 $ 91.2 $ 76.0 Design, Creative, and Technology 59.5 47.6 106.1 85.1 All Other 5.9 4.4 11.5 8.8 Total revenues $ 86.5 $ 71.4 $ 208.8 $ 169.9 Other income, net Commerce $ — $ 4.5 $ — $ 5.6 Design, Creative, and Technology — 3.4 — 25.3 All Other — 0.2 — 0.9 Total other income, net $ — $ 8.1 $ — $ 31.8 Adjusted EBITDA Commerce $ 6.5 $ 10.2 $ 45.9 $ 42.0 Design, Creative, and Technology 23.0 21.9 36.1 54.5 All Other ( 1.0 ) ( 2.9 ) ( 1.9 ) ( 5.2 ) Subtotal Adjusted EBITDA $ 28.5 $ 29.2 $ 80.1 $ 91.3 General corporate and other expenses $ ( 13.9 ) $ ( 13.6 ) $ ( 29.0 ) $ ( 26.4 ) Interest expense, net ( 9.1 ) ( 4.6 ) ( 16.0 ) ( 8.5 ) Loss on extinguishment of debt ( 2.3 ) — ( 2.3 ) — Goodwill impairment charge — — — ( 6.3 ) Intangible asset impairment charge — — — ( 1.6 ) Depreciation and amortization expense ( 12.9 ) ( 14.0 ) ( 26.4 ) ( 28.3 ) Stock-based compensation expense ( 1.9 ) ( 1.6 ) ( 4.0 ) ( 3.7 ) Deferred revenue adjustment — ( 0.2 ) — ( 0.4 ) Other items ( 0.9 ) 7.0 ( 5.1 ) 1.4 (Loss) income before income taxes $ ( 12.5 ) $ 2.2 $ ( 2.7 ) $ 17.5

Revenues - Additional Informati

Revenues - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Revenue From Contract With Customer [Line Items]
Current deferred revenues	$ 162.4		$ 162.4		$ 151.2
Revenue recognized	72.6	$ 59.3	182.6	$ 144
Cancelled event liabilities	2.7		$ 2.7		3.3
Maximum [Member]
Revenue From Contract With Customer [Line Items]
Contracts with customers sales beginning period			1 year
Contracts with customers commission benefited expected period			1 year
Other Noncurrent Liabilities [Member]
Revenue From Contract With Customer [Line Items]
Long-term deferred revenues	$ 1.2		$ 1.2		1.4
Trade Show and Other Events [Member] | Sales Revenue, Net [Member] | Customer Concentration Risk [Member]
Revenue From Contract With Customer [Line Items]
Concentration risk, percentage	86.40%	83.80%	89.10%	86.80%
Trade Shows [Member] | COVID-19 [Member]
Revenue From Contract With Customer [Line Items]
Current deferred revenues	$ 0.7		$ 0.7		0.8
Accounts receivable credits reclassified to cancelled event liabilities	$ 2		$ 2		$ 2.5

Revenues - Additional Informa_2

Revenues - Additional Information (Detail 1) - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2023-07-01	6 Months Ended
	Jun. 30, 2023
Maximum [Member]
Revenue From Contract With Customer [Line Items]
Revenue recognition of remaining performance obligations original expected period	1 year
Implementation Fees and Professional Services [Member]
Revenue From Contract With Customer [Line Items]
Revenue recognition of remaining performance obligations original expected period	4 years
Subscription Software and Services [Member]
Revenue From Contract With Customer [Line Items]
Revenue recognition of remaining performance obligations original expected period	3 years
Revenue recognition of remaining performance obligations expected renewal period	1 year

Revenues - Summary of Revenues

Revenues - Summary of Revenues Disaggregated (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation Of Revenue [Line Items]
Revenues	$ 86.5	$ 71.4	$ 208.8	$ 169.9
Trade Shows [Member]
Disaggregation Of Revenue [Line Items]
Revenues	55.1	50.5	152.2	129.1
Other Events [Member]
Disaggregation Of Revenue [Line Items]
Revenues	19.6	9.3	33.8	18.4
Subscription Software and Services [Member]
Disaggregation Of Revenue [Line Items]
Revenues	5.3	4.3	10.5	8.5
Other Marketing Services [Member]
Disaggregation Of Revenue [Line Items]
Revenues	6.5	7.3	12.3	13.9
Commerce [Member]
Disaggregation Of Revenue [Line Items]
Revenues	21.1	19.4	91.2	76
Commerce [Member] | Trade Shows [Member]
Disaggregation Of Revenue [Line Items]
Revenues	16.2	17.7	84.3	71.8
Commerce [Member] | Other Events [Member]
Disaggregation Of Revenue [Line Items]
Revenues	3.6		3.8	0.5
Commerce [Member] | Subscription Software and Services [Member]
Disaggregation Of Revenue [Line Items]
Revenues			0.1
Commerce [Member] | Other Marketing Services [Member]
Disaggregation Of Revenue [Line Items]
Revenues	1.3	1.7	3	3.7
Design, Creative and Technology [Member]
Disaggregation Of Revenue [Line Items]
Revenues	59.5	47.6	106.1	85.1
Design, Creative and Technology [Member] | Trade Shows [Member]
Disaggregation Of Revenue [Line Items]
Revenues	37.7	31.9	65.6	55.4
Design, Creative and Technology [Member] | Other Events [Member]
Disaggregation Of Revenue [Line Items]
Revenues	16	9.3	30	17.9
Design, Creative and Technology [Member] | Subscription Software and Services [Member]
Disaggregation Of Revenue [Line Items]
Revenues	0.6	0.8	1.2	1.6
Design, Creative and Technology [Member] | Other Marketing Services [Member]
Disaggregation Of Revenue [Line Items]
Revenues	5.2	5.6	9.3	10.2
All Other [Member]
Disaggregation Of Revenue [Line Items]
Revenues	5.9	4.4	11.5	8.8
All Other [Member] | Trade Shows [Member]
Disaggregation Of Revenue [Line Items]
Revenues	1.2	0.9	2.3	1.9
All Other [Member] | Subscription Software and Services [Member]
Disaggregation Of Revenue [Line Items]
Revenues	$ 4.7	$ 3.5	$ 9.2	$ 6.9

Business Acquisitions - Additio

Business Acquisitions - Additional Information (Detail) - USD ($) $ in Millions		3 Months Ended	6 Months Ended
	Jan. 09, 2023	Jun. 30, 2023	Jun. 30, 2023	Dec. 31, 2022
Business Acquisition [Line Items]
Contingent consideration on purchase price		$ 8.7	$ 8.7	$ 12.3
Lodestone [Member]
Business Acquisition [Line Items]
Purchase price	$ 10.2
Business acquisition, initial cash payment	9.5
Revenues		3.2	3.2
Net income		$ 1.1	$ 0.8
Intangible assets	3.4
Lodestone [Member] | Selling, General and Administrative Expenses [Member]
Business Acquisition [Line Items]
Acquisition costs incurred	0.4
Lodestone [Member] | Trade Names [Member]
Business Acquisition [Line Items]
Intangible assets	$ 1.1
Weighted-average amortization period	5 years
Assumed residual value	$ 0
Lodestone [Member] | Customer Relationship Intangibles [Member]
Business Acquisition [Line Items]
Intangible assets	$ 2.3
Weighted-average amortization period	6 years
Assumed residual value	$ 0
Lodestone [Member] | Estimated Fair Value [Member]
Business Acquisition [Line Items]
Contingent consideration on purchase price	$ 0.7

Business Acquisitions - Summary

Business Acquisitions - Summary of Purchase Price Allocation and Measurement Period Adjustment (Detail) - USD ($) $ in Millions	Jun. 30, 2023	Jan. 09, 2023	Dec. 31, 2022
Business Acquisition [Line Items]
Goodwill	$ 553.9		$ 545.5
Lodestone [Member]
Business Acquisition [Line Items]
Trade and other receivables		$ 1.8
Prepaid expenses and other current assets		0.2
Goodwill		8.4
Intangible assets		3.4
Deferred revenues		(3.6)
Purchase price, including working capital adjustment		$ 10.2

Business Acquisitions - Schedul

Business Acquisitions - Schedule of Supplemental Pro-Forma Information (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2022
Business Acquisition [Line Items]
Total pro-forma revenues	$ 79.5	$ 178.2
Total pro-forma net (loss) income	(1.2)	12.7
Advertising Week [Member]
Business Acquisition [Line Items]
Total pro-forma revenues	5.3	5.5
Total pro-forma net (loss) income		(0.6)
Emerald Revenue [Member]
Business Acquisition [Line Items]
Total pro-forma revenues	71.4	169.9
Bulletin Inc [Member]
Business Acquisition [Line Items]
Total pro-forma net (loss) income	(1.1)	(2.2)
Lodestone [Member]
Business Acquisition [Line Items]
Total pro-forma revenues	2.8	2.8
Total pro-forma net (loss) income	0.6	0.1
Emerald net (loss) income [Member]
Business Acquisition [Line Items]
Total pro-forma net (loss) income	$ (0.7)	$ 15.4

Property and Equipment - Summar

Property and Equipment - Summary of Property and Equipment, Net (Detail) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 6.1	$ 5.8
Less: Accumulated depreciation	(4.2)	(3.6)
Property and equipment, net	1.9	2.2
Furniture, Equipment and Other [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	5.1	4.8
Leasehold Improvements [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 1	$ 1

Property and Equipment - Additi

Property and Equipment - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Property, Plant and Equipment [Abstract]
Depreciation expense related to property and equipment	$ 200,000	$ 300,000	$ 500,000	$ 600,000
Loss on disposal of fixed assets	$ 0	$ 0	$ 200,000	$ 0

Intangible Assets and Goodwil_2

Intangible Assets and Goodwill - Summary of Intangible Assets, Net (Detail) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Schedule Of Intangible Assets Excluding Goodwill [Line Items]
Gross carrying amount	$ 553.5	$ 544.3
Accumulated amortization	(365.4)	(339.5)
Net carrying amount	188.1	204.8
Trade Names [Member]
Schedule Of Intangible Assets Excluding Goodwill [Line Items]
Gross carrying amount	52.6	52.6
Net carrying amount	52.6	52.6
Customer Relationship Intangibles [Member]
Schedule Of Intangible Assets Excluding Goodwill [Line Items]
Gross carrying amount	365.4	363.1
Accumulated amortization	(326.2)	(306.2)
Net carrying amount	39.2	56.9
Trade Names [Member]
Schedule Of Intangible Assets Excluding Goodwill [Line Items]
Gross carrying amount	91.1	90
Accumulated amortization	(19.9)	(17.2)
Net carrying amount	71.2	72.8
Acquired Technology [Member]
Schedule Of Intangible Assets Excluding Goodwill [Line Items]
Gross carrying amount	8.4	8.4
Accumulated amortization	(2.9)	(2.2)
Net carrying amount	5.5	6.2
Acquired Content [Member]
Schedule Of Intangible Assets Excluding Goodwill [Line Items]
Gross carrying amount	2.6	2.6
Accumulated amortization	(0.8)	(0.6)
Net carrying amount	1.8	2
Computer Software [Member]
Schedule Of Intangible Assets Excluding Goodwill [Line Items]
Gross carrying amount	32.3	25.5
Accumulated amortization	(15.6)	(13.3)
Net carrying amount	16.7	12.2
Capitalized Software in Progress [Member]
Schedule Of Intangible Assets Excluding Goodwill [Line Items]
Gross carrying amount	1.1	2.1
Net carrying amount	$ 1.1	$ 2.1

Intangible Assets and Goodwil_3

Intangible Assets and Goodwill - Additional Information (Detail)	3 Months Ended			6 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($) Segment	Jun. 30, 2023 USD ($) Segment	Jun. 30, 2022 USD ($)
Schedule Of Intangible Assets Excluding Goodwill [Line Items]
Amortization expense	$ 12,700,000	$ 13,700,000		$ 25,900,000	$ 27,700,000
Impairment of indefinite-lived intangible assets					1,600,000
Number of reporting units | Segment				1
Impairment of definite-lived intangible assets		0			0
Goodwill impairment charge	$ 0	$ 0		$ 0	6,300,000
Trade Names [Member]
Schedule Of Intangible Assets Excluding Goodwill [Line Items]
Impairment of indefinite-lived intangible assets			$ 1,600,000
New Reporting Unit [Member]
Schedule Of Intangible Assets Excluding Goodwill [Line Items]
Number of reporting units | Segment			1
Design, Creative and Technology [Member]
Schedule Of Intangible Assets Excluding Goodwill [Line Items]
Goodwill impairment charge			$ 5,800,000
Design, Creative and Technology [Member] | Trade Names [Member]
Schedule Of Intangible Assets Excluding Goodwill [Line Items]
Impairment of indefinite-lived intangible assets					$ 1,600,000
All Other [Member] | New Reporting Unit [Member]
Schedule Of Intangible Assets Excluding Goodwill [Line Items]
Goodwill impairment charge			$ 500,000

Intangible Assets and Goodwil_4

Intangible Assets and Goodwill - Schedule of Changes in Carrying Amount of Goodwill (Detail) - USD ($)	3 Months Ended			6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Goodwill [Line Items]
Goodwill, balance				$ 545,500,000
Acquired goodwill				8,400,000
Impairments	$ 0	$ 0		0	$ (6,300,000)
Goodwill, balance	553,900,000			553,900,000
Commerce [Member]
Goodwill [Line Items]
Goodwill, balance				356,100,000
Acquired goodwill				8,400,000
Goodwill, balance	364,500,000			364,500,000
Design, Creative and Technology [Member]
Goodwill [Line Items]
Goodwill, balance				160,800,000
Impairments			$ (5,800,000)
Goodwill, balance	160,800,000			160,800,000
All Other [Member]
Goodwill [Line Items]
Goodwill, balance				28,600,000
Goodwill, balance	$ 28,600,000			$ 28,600,000

Debt - Summary of Long-Term Deb

Debt - Summary of Long-Term Debt (Detail) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Long-term debt, net of debt discount and deferred financing fees	$ 398.9	$ 413.9
Less: Current maturities	4.2
Extended Term Loan Facility [Member]
Debt Instrument [Line Items]
Less: Current maturities	4.2
Secured debt	$ 403.1
Amended and Restated Term Loan Facility [Member]
Debt Instrument [Line Items]
Secured debt		$ 413.9

Debt - Summary of Long-Term D_2

Debt - Summary of Long-Term Debt (Parenthetical) (Detail) - USD ($) $ in Millions		6 Months Ended	12 Months Ended
	Jun. 12, 2023	Jun. 30, 2023	Dec. 31, 2022
Extended Term Loan Facility [Member]
Debt Instrument [Line Items]
Actual interest rate		10.20%
Maturity year		2026
Debt maturity date	May 22, 2026	May 22, 2026
Unamortized discount		$ 10.5
Unamortized deferred financing fees		1.7
Fair market value		$ 404.4
Extended Term Loan Facility [Member] | SOFR [Member]
Debt Instrument [Line Items]
Basis spread		5%
Basis spread including credit spread adjustment		5.10%
Amended and Restated Term Loan Facility [Member]
Debt Instrument [Line Items]
Actual interest rate			6.57%
Maturity year			2024
Debt maturity date	May 22, 2024
Unamortized discount			$ 0.6
Unamortized deferred financing fees			$ 0.8
Amended and Restated Term Loan Facility [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Basis spread			2.50%

Debt - Term Loan Facility - Add

Debt - Term Loan Facility - Additional Information (Detail) - USD ($) $ in Millions		3 Months Ended	6 Months Ended	12 Months Ended	67 Months Ended
	Jun. 12, 2023	Jun. 30, 2023	Jun. 30, 2023	Dec. 31, 2022	Jun. 11, 2023
Debt Instrument [Line Items]
Original issuance discount			$ 12.5
Loss on extinguishment of debt		$ 2.3	$ 2.3
Extended Term Loan Facility [Member]
Debt Instrument [Line Items]
Debt maturity date	May 22, 2026		May 22, 2026
Interest rate		11.40%	11.40%
Borrowings outstanding		$ 415.3	$ 415.3
Prepayment fee percentage for repricing transaction occurring within Twelve months	2%
Prepayment fee percentage for repricing transaction occurring between Twelve and Eighteen months	1%
Debt Issuance Cost		1.7	1.7
Unpaid debt issuance costs		0.3	0.3
Quarterly installment percentage of principal amount outstanding	0.25%
Net proceeds from loan	$ 415.3
Original issuance discount	12.5
Third party fees	3.5
Capitalized debt issuance costs			1.4
Loss on extinguishment of debt		2.3	2.3
Amortization of original issuance discount related to loss on extinguishment of debt			10.4
Extended Term Loan Facility [Member] | Interest Expense [Member]
Debt Instrument [Line Items]
Third party fees			2.1
Extended Term Loan Facility [Member] | Loss on Extinguishment of Debt [Member]
Debt Instrument [Line Items]
Original issuance discount		2.1	$ 2.1
Extended Term Loan Facility [Member] | SOFR [Member]
Debt Instrument [Line Items]
Basis spread			5%
Credit spread adjustment			0.10%
Extended Term Loan Facility [Member] | ABR [Member]
Debt Instrument [Line Items]
Basis spread			4%
Extended Term Loan Facility [Member] | Funded Through Non-cash Rollover from Existing Lenders [Member]
Debt Instrument [Line Items]
Net proceeds from loan	175.9
Extended Term Loan Facility [Member] | Funded Through Cash Transactions [Member]
Debt Instrument [Line Items]
Net proceeds from loan	$ 239.4
Amended and Restated Term Loan Facility [Member]
Debt Instrument [Line Items]
Debt maturity date	May 22, 2024
Interest rate				6.89%
Debt Issuance Cost				$ 0.8
Amended and Restated Term Loan Facility [Member] | Loss on Extinguishment of Debt [Member]
Debt Instrument [Line Items]
Previously capitalized OID and debt issuance costs		$ 0.2	$ 0.2
Amended and Restated Term Loan Facility [Member] | ABR [Member] | Maximum [Member]
Debt Instrument [Line Items]
Basis spread					1.75%
Amended and Restated Term Loan Facility [Member] | ABR [Member] | Minimum [Member]
Debt Instrument [Line Items]
Basis spread					1.50%
Amended and Restated Term Loan Facility [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Basis spread				2.50%
Amended and Restated Term Loan Facility [Member] | LIBOR [Member] | Maximum [Member]
Debt Instrument [Line Items]
Basis spread					2.75%
Amended and Restated Term Loan Facility [Member] | LIBOR [Member] | Minimum [Member]
Debt Instrument [Line Items]
Basis spread					2.50%

Debt - Revolving Credit Facilit

Debt - Revolving Credit Facility - Additional Information (Detail) - Amended and Restated Revolving Credit Facility [Member] - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Mar. 31, 2023	Feb. 02, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Secured debt						$ 110,000,000	$ 100,400,000
Financing fees					$ 600,000
Borrowings outstanding	$ 0		$ 0				0
Stand-by letters of credit	$ 1,000,000		$ 1,000,000				$ 1,000,000
LIBOR [Member]
Debt Instrument [Line Items]
Basis spread		2.25%		2.25%
SOFR [Member]
Debt Instrument [Line Items]
Basis spread	2.25%		2.25%
ABR [Member]
Debt Instrument [Line Items]
Basis spread	1.25%	1.25%	1.25%	1.25%

Debt - Summary of Interest Expe

Debt - Summary of Interest Expense (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Debt Instrument [Line Items]
Non-cash interest for amortization of debt discount and debt issuance costs	$ 0.5	$ 0.3	$ 0.9	$ 0.6
Total interest expense	11.4	4.8	19.4	8.7
Extended Term Loan Facility [Member]
Debt Instrument [Line Items]
Interest expense on term loan	2.2		2.2
Amended and Restated Term Loan Facility [Member]
Debt Instrument [Line Items]
Interest expense on term loan	6.4	4.3	13.9	7.8
Term Loan Amendment Third Party Fees [Member]
Debt Instrument [Line Items]
Interest expense on term loan	2.1		2.1
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Revolving credit facility interest and commitment fees	$ 0.2	$ 0.2	$ 0.3	$ 0.3

Debt - Covenants - Additional I

Debt - Covenants - Additional Information (Detail) - Amended and Restated Revolving Credit Facility [Member] $ in Millions	6 Months Ended
	Jun. 30, 2023 USD ($)
Debt Instrument [Line Items]
Leverage ratio	550%
Letters of credit outstanding amount	$ 10
Percentage of amount outstanding exceeds total commitment for testing of financial covenant	35%

Fair Value Measurements and F_3

Fair Value Measurements and Financial Risk - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Assets
Total assets at fair value	$ 204.7	$ 239.1
Liabilities
Market-based share awards liability	0.5	0.4
Contingent consideration	8.7	12.3
Total liabilities at fair value	9.2	12.7
Cash and Cash Equivalents [Member]
Assets
Cash and cash equivalents	97.2	147.5
Money Market Mutual Funds [Member]
Assets
Cash and cash equivalents	107.5	91.6
Fair Value Measurements Recurring [Member] | Level 1 [Member]
Assets
Total assets at fair value	204.7	239.1
Fair Value Measurements Recurring [Member] | Level 3 [Member]
Liabilities
Market-based share awards liability	0.5	0.4
Contingent consideration	8.7	12.3
Total liabilities at fair value	9.2	12.7
Fair Value Measurements Recurring [Member] | Cash and Cash Equivalents [Member] | Level 1 [Member]
Assets
Cash and cash equivalents	97.2	147.5
Fair Value Measurements Recurring [Member] | Money Market Mutual Funds [Member] | Level 1 [Member]
Assets
Cash and cash equivalents	$ 107.5	$ 91.6

Fair Value Measurements and F_4

Fair Value Measurements and Financial Risk - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Parenthetical) (Detail) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Money market mutual funds	$ 107.5
Market-based share awards liability	0.5	$ 0.4
Contingent consideration	0.5
Other Noncurrent Liabilities [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Market-based share awards liability	0.5
Contingent consideration	$ 8.2

Fair Value Measurements and F_5

Fair Value Measurements and Financial Risk - Additional Information (Detail) - USD ($)	3 Months Ended	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Jan. 09, 2023	Dec. 31, 2022
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Market-based share awards liability	$ 500,000	$ 500,000			$ 400,000
Contingent consideration on purchase price	8,700,000	8,700,000			12,300,000
Selling, General and Administrative Expenses [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Business combination increase (decrease) in fair value of contingent consideration liability	(700,000)	(700,000)	$ (700,000)
EDspaces, PlumRiver Technologies ("PlumRiver"), Sue Bryce Education and The Portrait Masters, AV-IQ, Advertising Week, and Bulletin [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Contingent consideration on purchase price					12,300,000
AV-IQ, Advertising Week, Bulletin and Lodestone [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Contingent consideration on purchase price	8,700,000	8,700,000
Plum River [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Remeasurement adjustments	3,700,000
Lodestone [Member] | Estimated Fair Value [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Contingent consideration on purchase price				$ 700,000
Expected to be Settled in 2024 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Contingent consideration on purchase price	500,000	500,000
Expected to be Settled in 2025 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Contingent consideration on purchase price	200,000	200,000
Expected to be Settled in 2027 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Contingent consideration on purchase price	8,100,000	8,100,000
Market-based Share Awards [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Market-based share awards liability	$ 500,000	500,000			$ 400,000
Employee right to receive restricted stock equal to maximum cash price		$ 9,800,000

Stockholder's Deficit and Redee

Stockholder's Deficit and Redeemable Convertible Preferred Stock - Additional Information (Detail) - USD ($)			1 Months Ended	2 Months Ended		3 Months Ended				6 Months Ended
	Jul. 24, 2020	Jun. 10, 2020	Oct. 31, 2020	Aug. 13, 2020	Aug. 13, 2020	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022	Oct. 26, 2022	Oct. 31, 2021
Temporary Equity And Shareholders Equity [Line Items]
Dividends paid or declared						$ 0	$ 0	$ 0	$ 0
Repurchase of common stock								3,300,000		$ 16,900,000	$ 4,300,000
October 2020 Share Repurchase Program [Member]
Temporary Equity And Shareholders Equity [Line Items]
Stock repurchase program, authorized amount			$ 20,000,000										$ 20,000,000
Repurchase of common stock								$ 3,400,000			$ 4,300,000
Repurchase of common stock, shares								982,622			1,238,206
October 2022 Share Repurchase Program [Member]
Temporary Equity And Shareholders Equity [Line Items]
Stock repurchase program, authorized amount												$ 20,000,000
Repurchase of common stock						$ 16,900,000				$ 16,900,000
Repurchase of common stock, shares						0				5,064,140
Stock repurchase program, remaining authorized repurchase amount						$ 3,000,000				$ 3,000,000
Maximum [Member] | October 2020 Share Repurchase Program [Member]
Temporary Equity And Shareholders Equity [Line Items]
Repurchase of common stock			$ 20,000,000
Redeemable Convertible Preferred Stock [Member]
Temporary Equity And Shareholders Equity [Line Items]
Dividends payable to common stock						$ 0	$ 0	$ 0	$ 0	$ 0
Consecutive trading days										20 days
Right to redeem preferred stock threshold period										6 years
Preferred stock as percentage on outstanding common stock on an as-converted basis										30%
Redeemable Convertible Preferred Stock [Member] | After Six-Year Anniversary Thereof [Member]
Temporary Equity And Shareholders Equity [Line Items]
Percentage of accreted liquidation preference										105%
Redeemable Convertible Preferred Stock [Member] | After Seven-Year Anniversary Thereof [Member]
Temporary Equity And Shareholders Equity [Line Items]
Percentage of accreted liquidation preference										103%
Redeemable Convertible Preferred Stock [Member] | Minimum [Member]
Temporary Equity And Shareholders Equity [Line Items]
Percentage of trading price per share of common stock after third anniversary						175%				175%
Threshold purchase price for acquisition or disposition of assets										$ 100,000,000
Initial Private Placement [Member] | Onex Partners V LP [Member] | Redeemable Convertible Preferred Stock [Member]
Temporary Equity And Shareholders Equity [Line Items]
Shares issued		47,058,332
Aggregate purchase price per share		$ 5.6
Preferred stock accretion rate per annum							7%
Preferred stock, accretion						$ 8,400,000		7,800,000		16,700,000	$ 15,600,000
Preferred stock, aggregate liquidation preference						$ 492,600,000		459,700,000		$ 492,600,000	459,700,000
Preferred stock initial liquidation preference						$ 5.6				$ 5.6
Redeemable convertible preferred stock conversion										1.59
Initial conversion price per share										$ 3.52
Preferred stock, accretion of deemed dividend						$ 10,400,000		$ 9,600,000		$ 20,500,000	$ 18,800,000
Rights Offering [Member] | Onex Partners V LP [Member] | Redeemable Convertible Preferred Stock [Member]
Temporary Equity And Shareholders Equity [Line Items]
Shares issued	1,727,427			69,718,919
Proceeds from issuance of preferred stock	$ 9,700,000				$ 373,300,000
Fees and estimated expenses					$ 17,200,000

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Detail)		1 Months Ended		3 Months Ended			6 Months Ended
	Jan. 31, 2019 USD ($) Hours shares	Jan. 31, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2023 USD ($) $ / shares shares	Jun. 30, 2022 USD ($)	Mar. 31, 2019 USD ($)	Jun. 30, 2023 USD ($) $ / shares shares	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)	Mar. 31, 2020 USD ($)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Deferred tax benefit for stock-based compensation				$ 500,000	$ 400,000		$ 1,000,000	$ 1,000,000
Market-based share awards liability				500,000			500,000		$ 400,000
Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense				1,600,000	900,000		3,100,000	2,200,000
Unrecognized stock-based compensation expense				16,100,000			$ 16,100,000
Unrecognized stock-based compensation expense weighted average period of recognition							3 years 14 days
Restricted Stock Units ("RSUs") [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense				200,000	600,000		$ 700,000	1,400,000
Unrecognized stock-based compensation expense				1,400,000			$ 1,400,000
Unrecognized stock-based compensation expense weighted average period of recognition							1 year 8 months 12 days
Estimated shares of common stock granted | shares							115,000
Weighted-average grant date fair value | $ / shares							$ 3.93
Market-based Share Awards [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense				$ 100,000	100,000		$ 100,000	100,000
Employee right to receive restricted stock equal to maximum price		$ 4,900,000	$ 4,900,000
Estimated weighted average conversion threshold | $ / shares				$ 21.08			$ 21.08
Estimated shares of common stock issue upon conversion | shares				78,041			78,041
Estimated shares of common stock granted | shares							78,041
Weighted-average grant date fair value | $ / shares							$ 24.77
Market-based share awards liability				$ 500,000			$ 500,000		$ 400,000
Fair value at grant date						$ 800,000
Fair value of awards										$ 1,100,000
2019 Employee Stock Purchase Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of discount received	10
Common stock, reserved for issuance | shares	500,000
Stock-based compensation expense				$ 0	$ 0		$ 0	$ 0
2019 Employee Stock Purchase Plan [Member] | Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of hours per week worked by employees for eligible | Hours	20
Number of months of service to be completed for eligible	6 months
2019 Employee Stock Purchase Plan [Member] | Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Amount of compensation	$ 150,000

Stock-Based Compensation - Sche

Stock-Based Compensation - Schedule of Stock Option Activity (Detail) - $ / shares shares in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2023	Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]
Number of Options Outstanding, Beginning Balance	14,555
Number of Options, Granted	7,146
Number of Options, Exercised	1
Number of Options, Forfeited/Expired	(845)
Number of Options Outstanding, Ending Balance	20,855	14,555
Number of Options, Exercisable	6,657
Weighted-Average Exercise Price per Option Outstanding, Beginning Balance	$ 7.9
Weighted-Average Exercise Price per Option, Granted	3.81
Weighted-Average Exercise Price per Option, Exercised	2.87
Weighted-Average Exercise Price per Option, Forfeited/Expired	10.67
Weighted-Average Exercise Price per Option Outstanding, Ending Balance	6.39	$ 7.9
Weighted-Average Exercise Price per Option, Exercisable	$ 9.22
Weighted-Average Remaining Contractual Term, Outstanding Balance	7 years 9 months 18 days	7 years 1 month 6 days
Weighted-Average Remaining Contractual Term, Exercisable	6 years

Stock-Based Compensation - Sc_2

Stock-Based Compensation - Schedule of Restricted Stock Units Activity (Detail) - Restricted Stock Units ("RSUs") [Member] shares in Thousands	6 Months Ended
	Jun. 30, 2023 $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of RSUs Unvested, Beginning Balance | shares	878
Number of RSUs, Granted | shares	115
Number of RSUs, Forfeited | shares	(13)
Number of RSUs, Vested | shares	(416)
Number of RSUs Unvested, Ending Balance | shares	564
Weighted Average Grant Date Fair Value per Share Unvested, Beginning Balance | $ / shares	$ 6.87
Weighted Average Grant Date Fair Value per Share, Granted | $ / shares	3.93
Weighted Average Grant Date Fair Value per Share, Forfeited | $ / shares	10.08
Weighted Average Grant Date Fair Value per Share, Vested | $ / shares	7.03
Weighted Average Grant Date Fair Value per Share Unvested, Ending Balance | $ / shares	$ 6.06

Stock-Based Compensation - Sc_3

Stock-Based Compensation - Schedule of Assumptions Used in Determining Fair Value Performance-based Market Condition Share Awards Outstanding (Detail) - Market-based Share Awards [Member]	6 Months Ended
	Jun. 30, 2023
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected volatility	63.40%
Dividend yield	0%
Risk-free interest rate	4%
Weighted-average expected term (in years)	6 years 9 months 18 days

Earnings Per Share - Additional

Earnings Per Share - Additional Information (Detail) - 7% Series A Redeemable Convertible Participating Preferred Stock [Member]	6 Months Ended
	Jun. 30, 2023 shares
Earnings Per Share [Line Items]
Preferred stock, shares outstanding	71,402,907
Convertible preferred stock, converted to common stock	139,939,471
Convertible preferred stock, percentage	7%

Earnings Per Share - Computatio

Earnings Per Share - Computation of Basic and Diluted Earnings Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Earnings Per Share [Line Items]
Net (loss) income and comprehensive (loss) income attributable to Emerald Holding, Inc.	$ (8.1)	$ (0.7)	$ (1)	$ 15.4
Accretion to redemption value of redeemable convertible preferred stock	(10.4)	(9.6)	(20.5)	(18.8)
Net loss and comprehensive loss attributable to Emerald Holding, Inc. common stockholders	$ (18.5)	$ (10.3)	$ (21.5)	$ (3.4)
Weighted average common shares outstanding	62,868	69,816	65,048	70,007
Basic loss per share	$ (0.29)	$ (0.15)	$ (0.33)	$ (0.05)
Net loss and comprehensive loss attributable to Emerald Holding, Inc.common stockholders	$ (18.5)	$ (10.3)	$ (21.5)	$ (3.4)
Diluted weighted average common shares outstanding	62,868	69,816	65,048	70,007
Diluted loss per share	$ (0.29)	$ (0.15)	$ (0.33)	$ (0.05)
Anti-dilutive employee share awards excluded from diluted earnings per share calculation	20,847	15,261	20,847	15,219
Redeemable Convertible Preferred Stock [Member]
Earnings Per Share [Line Items]
Accretion to redemption value of redeemable convertible preferred stock	$ (10.4)	$ (9.6)	$ (20.5)	$ (18.8)

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Income Tax Disclosure [Abstract]
U.S. Corporate federal income tax rate			21%
(Benefit from) income taxes	$ (4.4)	$ 2.9	$ (1.7)	$ 2.1
Effective income tax rates	35.20%	131.80%	63%	12%
Liabilities for unrecognized tax benefits and associated interest and penalties	$ 0		$ 0		$ 0

Accounts Payable and Other Cu_3

Accounts Payable and Other Current Liabilities - Schedule of Accounts Payable and Other Current Liabilities (Detail) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Payables and Accruals [Abstract]
Trade payables	$ 18.6	$ 20.4
Other current liabilities	8.5	14.7
Accrued event costs	15	11.7
Accrued personnel costs	8.1	11.3
Total accounts payable and other current liabilities	$ 50.2	$ 58.1

Segment Information - Additiona

Segment Information - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2023 Segment BrandPortfolio
Segment Reporting Information [Line Items]
Number of operating segments, aggregated into reportable segments	5
Number of reportable segments	2
Number of additional operating segments that do not meet quantitative thresholds for reporting segment	2
Chief Operating Decision Maker [Member]
Segment Reporting Information [Line Items]
Number of operating segment	7
Number of executive brand portfolios | BrandPortfolio	7

Segment Information - Reconcili

Segment Information - Reconciliation of Reportable Segment Revenues, Other Income and Adjusted EBITDA to Net (loss) Income (Detail) - USD ($)	3 Months Ended			6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenues
Revenues	$ 86,500,000	$ 71,400,000		$ 208,800,000	$ 169,900,000
Other Income, net
Other income, net		8,100,000			31,800,000
Adjusted EBITDA
Subtotal Adjusted EBITDA	28,500,000	29,200,000		80,100,000	91,300,000
General corporate and other expenses	(13,900,000)	(13,600,000)		(29,000,000)	(26,400,000)
Interest expense, net	(9,100,000)	(4,600,000)		(16,000,000)	(8,500,000)
Loss on extinguishment of debt	(2,300,000)			(2,300,000)
Goodwill impairment charge	0	0		0	(6,300,000)
Intangible asset impairment charge					(1,600,000)
Depreciation and amortization expense	(12,900,000)	(14,000,000)		(26,400,000)	(28,300,000)
Stock-based compensation expense	(1,900,000)	(1,600,000)		(3,900,000)	(3,700,000)
Deferred revenue adjustment		(200,000)			(400,000)
Other items	(900,000)	7,000,000		(5,100,000)	1,400,000
(Loss) income before income taxes	(12,500,000)	2,200,000		(2,700,000)	17,500,000
Commerce [Member]
Revenues
Revenues	21,100,000	19,400,000		91,200,000	76,000,000
Other Income, net
Other income, net		4,500,000			5,600,000
Adjusted EBITDA
Subtotal Adjusted EBITDA	6,500,000	10,200,000		45,900,000	42,000,000
Design, Creative and Technology [Member]
Revenues
Revenues	59,500,000	47,600,000		106,100,000	85,100,000
Other Income, net
Other income, net		3,400,000			25,300,000
Adjusted EBITDA
Subtotal Adjusted EBITDA	23,000,000	21,900,000		36,100,000	54,500,000
Goodwill impairment charge			$ (5,800,000)
All Other [Member]
Revenues
Revenues	5,900,000	4,400,000		11,500,000	8,800,000
Other Income, net
Other income, net		200,000			900,000
Adjusted EBITDA
Subtotal Adjusted EBITDA	$ (1,000,000)	$ (2,900,000)		$ (1,900,000)	$ (5,200,000)

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Onex Corporation [Member] | As Converted Common Stock [Member]
Related Party Transaction [Line Items]
Related parties, ownership percentage	90.70%		90.70%
ASM Global [Member] | Related Party [Member]
Related Party Transaction [Line Items]
Other liabilities	$ 0.1		$ 0.1		$ 0
ASM Global [Member] | Onex Corporation [Member]
Related Party Transaction [Line Items]
Related parties, ownership percentage	48%		48%
ASM Global [Member] | Cost Of Revenues [Member]
Related Party Transaction [Line Items]
Cost of services facilities and catering	$ 0.4	$ 0.5	$ 0.7	$ 0.8
Convex Group Ltd [Member]
Related Party Transaction [Line Items]
Other liabilities	$ 0		$ 0		$ 0
Convex Group Ltd [Member] | Onex Corporation [Member]
Related Party Transaction [Line Items]
Related parties, ownership percentage	96%		96%
Convex Group Ltd [Member] | Cost Of Revenues [Member]
Related Party Transaction [Line Items]
Selling, general and administrative expense insurance	$ 0.2	$ 0.2	$ 0.2	$ 0.5