CECO Environmental (CECO) 10-Q 9 May 23 2023 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2023	May 01, 2023
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2023
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q1
Trading Symbol	CECO
Entity Registrant Name	CECO ENVIRONMENTAL CORP.
Entity Central Index Key	0000003197
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Current Reporting Status	Yes
Entity File Number	0-07099
Entity Tax Identification Number	13-2566064
Entity Address, Address Line One	14651 North Dallas Parkway
Entity Address, Address Line Two	Suite 500
Entity Address, City or Town	Dallas
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	75254
City Area Code	214
Local Phone Number	357-6181
Entity Common Stock, Shares Outstanding		34,590,733
Entity Interactive Data Current	Yes
Entity Small Business	true
Entity Emerging Growth Company	false
Document Transition Report	false
Document Quarterly Report	true
Entity Shell Company	false
Title of 12(b) Security	Common Stock, par value $0.01 per share
Security Exchange Name	NASDAQ
Entity Incorporation, State or Country Code	DE

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 41,233	$ 45,522
Restricted cash	971	1,063
Accounts receivable, net	109,889	83,086
Costs and estimated earnings in excess of billings on uncompleted contracts	79,817	71,016
Inventories, net	30,298	26,526
Prepaid expenses and other current assets	11,995	12,174
Prepaid income taxes	1,249	1,271
Total current assets	275,452	240,658
Property, plant and equipment, net	23,879	20,828
Right-of-use assets from operating leases	11,719	11,373
Goodwill	207,788	183,197
Intangible assets – finite life, net	35,414	35,251
Intangible assets – indefinite life	9,536	9,508
Deferred income taxes	821	829
Deferred charges and other assets	2,959	3,077
Total assets	567,568	504,721
Current liabilities:
Current portion of debt	3,854	3,579
Accounts payable and accrued expenses	111,586	107,198
Billings in excess of costs and estimated earnings on uncompleted contracts	51,923	32,716
Notes Payable Current	1,000	0
Income taxes payable	3,190	3,207
Total current liabilities	171,553	146,700
Other liabilities	15,186	15,129
Debt, less current portion	141,415	107,625
Deferred income tax liability, net	8,711	8,666
Operating lease liabilities	8,521	8,453
Total liabilities	345,386	286,573
Commitments and contingencies
Shareholders’ equity:
Preferred stock, $.01 par value; 10,000 shares authorized, none issued	0	0
Common stock, $.01 par value; 100,000,000 shares authorized, 34,556,620 and 34,381,668 shares issued and outstanding at March 31, 2023 andDecember 31, 2022, respectively	346	344
Capital in excess of par value	250,971	250,174
Accumulated loss	(17,320)	(19,298)
Accumulated other comprehensive loss	(17,230)	(17,996)
Total CECO shareholders' equity	216,767	213,224
Non-controlling interest	5,415	4,924
Total shareholders' equity	222,182	218,148
Total liabilities and shareholders' equity	$ 567,568	$ 504,721

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000	10,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	34,556,620	34,381,668
Common Stock, shares outstanding	34,556,620	34,381,668

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Statement [Abstract]
Net sales	$ 112,563	$ 92,436
Cost of sales	77,670	66,008
Gross profit	34,893	26,428
Selling and administrative expenses	27,193	18,652
Amortization and earnout expenses	1,747	1,452
Acquisition and integration expenses	492	1,049
Restructuring expenses	0	73
Income (loss) from operations	5,461	5,202
Other income (expense), net	(574)	(458)
Interest expense	(2,408)	(822)
Income (loss) before income taxes	2,479	3,922
Income tax expense	10	1,112
Net income (loss)	2,469	2,810
Non-controlling interest	(491)	(18)
Net income (loss) attributable to CECO Environmental Corp.	$ 1,978	$ 2,792
Earnings (loss) per share:
Basic	$ 0.06	$ 0.08
Diluted	$ 0.06	$ 0.08
Weighted average number of common shares outstanding:
Basic	34,441,905	35,051,034
Diluted	35,198,668	35,199,201

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 2,469	$ 2,810
Other comprehensive income (loss), net of tax:
Foreign currency translation (loss) gain	766	(531)
Comprehensive income	$ 3,235	$ 2,279

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Capital in Excess of Par Value [Member]	Accumulated Loss [Member]	Accumulated Other Comprehensive Loss [Member]	Noncontrolling Interest [Member]
Beginning Balance at Dec. 31, 2021	$ 205,957	$ 350	$ 252,989	$ (36,715)	$ (12,070)	$ 1,403
Beginning Balance, Shares at Dec. 31, 2021		35,028
Net income	2,810			2,792		18
Restricted stock units issued	(67)		(67)
Restricted stock units issued, Shares		34
Share based compensation earned	953		953
Share based compensation earned, Shares		14
Translation gain (loss)	(531)				(531)
Noncontrolling interest distribution	(900)					(900)
Fair value of noncontrolling interest equity issued (see Note 14)	5,000					5,000
Ending Balance at Mar. 31, 2022	213,222	$ 350	253,875	(33,923)	(12,601)	5,521
Ending Balance, Shares at Mar. 31, 2022		35,076
Beginning Balance at Dec. 31, 2022	218,148	$ 344	250,174	(19,298)	(17,996)	4,924
Beginning Balance, Shares at Dec. 31, 2022		34,382
Net income	2,469			1,978		491
Exercise of stock options	612	$ 1	611
Exercise of stock options, Shares		52
Restricted stock units issued	(621)	$ 1	(622)
Restricted stock units issued, Shares		123
Share based compensation earned	808		808
Translation gain (loss)	$ 766				766
Common stock repurchase and retirement (see Note 8), Shares	0
Ending Balance at Mar. 31, 2023	$ 222,182	$ 346	$ 250,971	$ (17,320)	$ (17,230)	$ 5,415
Ending Balance, Shares at Mar. 31, 2023		34,557

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities:
Net income	$ 2,469	$ 2,810
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization	2,885	2,288
Unrealized foreign currency (gain) loss	(92)	263
Gain on sale of property and equipment	(17)	(7)
Debt discount amortization	91	93
Share-based compensation expense	806	877
Bad debt expense	83	45
Inventory reserve expense	175	213
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	(22,786)	(18,964)
Costs and estimated earnings in excess of billings on uncompleted contracts	(8,418)	1,515
Inventories	(2,191)	(3,316)
Prepaid expense and other current assets	572	(878)
Deferred charges and other assets	(325)	996
Accounts payable and accrued expenses	(1,056)	7,452
Billings in excess of costs and estimated earnings on uncompleted contracts	16,838	7,615
Income taxes payable	(17)	137
Other liabilities	(1,038)	(1,341)
Net cash used in operating activities	(12,021)	(202)
Cash flows from investing activities:
Acquisitions of property and equipment	(2,513)	(665)
Net proceeds from sale of assets	0	7
Net cash paid for acquisition	(24,142)	(19,583)
Net cash used in investing activities	(26,655)	(20,241)
Cash flows from financing activities:
Borrowings on revolving credit lines	54,800	17,800
Repayments on revolving credit lines	(20,000)	(7,200)
Borrowing on long-term debt	0	11,000
Repayments of long-term debt	(826)	(643)
Deferred financing fees paid	0	(130)
Payments on finance leases and financing liability	(225)	(145)
Proceeds from employee stock purchase plan and exercise of stock options	610	77
Noncontrolling interest distributions	0	(900)
Net cash provided by financing activities	34,359	19,859
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(64)	(1,111)
Net decrease in cash, cash equivalents and restricted cash	(4,381)	(1,695)
Cash, cash equivalents and restricted cash at beginning of period	46,585	31,995
Cash, cash equivalents and restricted cash at end of period	42,204	30,300
Cash paid during the period for:
Interest	2,338	812
Income taxes	$ 1,290	$ 390

Basis of Reporting for Consolid

Basis of Reporting for Consolidated Financial Statements	3 Months Ended
	Mar. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Reporting for Consolidated Financial Statements	1. Basis of Reporting for Consolidated Financial Statements The accompanying unaudited condensed consolidated financial statements of CECO Environmental Corp. and its subsidiaries (the “Company,” “CECO,” “we,” “us,” or “our”) have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”). Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) have been condensed or omitted pursuant to those rules and regulations. In the opinion of management, the accompanying unaudited condensed consolidated financial statements of the Company contain all adjustments (consisting only of normal recurring adjustments) necessary to present fairly the financial position as of March 31, 2023 and the results of operations, cash flows and shareholders’ equity for the three months ended March 31, 2023 and 2022. The results of operations for the three months ended March 31, 2023 are not necessarily indicative of the results to be expected for the full year. The balance sheet as of December 31, 2022 has been derived from the audited consolidated financial statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022 as filed with the SEC on March 6, 2023 (the “Form 10-K”). The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. These financial statements and accompanying notes should be read in conjunction with the audited financial statements and the notes thereto included in the Form 10-K. Unless otherwise indicated, all balances within tables are in thousands, except per share amounts.

New Financial Accounting Pronou

New Financial Accounting Pronouncements	3 Months Ended
	Mar. 31, 2023
Accounting Changes and Error Corrections [Abstract]
New Financial Accounting Pronouncements	2. New Financial Accounting Pronouncements Accounting Standards Adopted in Fiscal 2023 On January 1, 2023, the beginning of the Company's fiscal year, the Company adopted Accounting Standards Update ("ASU") 2021-08, Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers, which addresses how an acquirer should recognize and measure revenue contracts acquired in a business combination. The adoption of ASU 2021-08 did not have a material impact on the Company's financial statements. Accounting Standards to be Adopted None.

Accounts Receivable

Accounts Receivable	3 Months Ended
	Mar. 31, 2022
Receivables [Abstract]
Accounts Receivable	3. Accounts Receivable Accounts receivable consisted of the following: (in thousands) March 31, 2023 December 31, 2022 Accounts receivable $ 114,044 $ 87,306 Allowance for doubtful accounts ( 4,155 ) ( 4,220 ) Total accounts receivable, net $ 109,889 $ 83,086 Balances billed but not paid by customers under retainage provisions in contracts within the Condensed Consolidated Balance Sheets amounted to approximately $ 1.5 million and $ 1.6 million at March 31, 2023 and December 31, 2022, respectively. Retainage receivables on contracts in progress are generally collected within a year or two subsequent to contract completion, and are recorded in either "Accounts receivable, net" or "Deferred charges and other assets" within the Condensed Consolidated Balance Sheets depending on timing of expected collection. Provision for credit losses was $ 0.1 million and zero for the three months ended March 31, 2023 and 2022 , respectively.

Inventories

Inventories	3 Months Ended
	Mar. 31, 2023
Inventory Disclosure [Abstract]
Inventories	4. Inventories Inventories consisted of the following: (in thousands) March 31, 2023 December 31, 2022 Raw materials $ 21,661 $ 19,774 Work in process 9,091 7,183 Finished goods 2,466 2,436 Obsolescence allowance ( 2,920 ) ( 2,867 ) Total inventories $ 30,298 $ 26,526 Amounts credited to the allowance for obsolete inventory and charged to cost of sales amounted to $ 0.2 million for each of the three months ended March 31, 2023 and 2022 .

Goodwill and Intangible Assets

Goodwill and Intangible Assets	3 Months Ended
	Mar. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	5. Goodwill and Intangible Assets Goodwill activity for the three months ended March 31, 2023 and the year ended December 31, 2022 was as follows: (in thousands) Three months ended March 31, 2023 Year ended December 31, 2022 Goodwill / Tradename Goodwill Tradename Goodwill Tradename Balance at beginning of period $ 183,197 $ 9,508 $ 161,183 $ 9,629 Acquisitions 24,380 — 23,312 — Foreign currency translation 211 28 ( 1,298 ) ( 121 ) Balance at end of period $ 207,788 $ 9,536 $ 183,197 $ 9,508 Finite life intangible assets consisted of the following: March 31, 2023 December 31, 2022 (in thousands) Cost Accum. Amort. Cost Accum. Amort. Technology $ 14,457 $ 13,799 $ 14,457 $ 13,729 Customer lists 87,151 58,877 85,719 57,540 Tradename 11,934 4,051 11,604 3,768 Foreign currency adjustments ( 1,607 ) ( 206 ) ( 1,864 ) ( 372 ) Total intangible assets – finite life $ 111,935 $ 76,521 $ 109,916 $ 74,665 Finite life intangible asset activity for the three months ended March 31, 2023 and 2022 was as follows: (in thousands) 2023 2022 Intangible assets – finite life, net at beginning of period $ 35,251 $ 25,841 Amortization expense ( 1,690 ) ( 1,431 ) Acquisitions 1,778 — Foreign currency adjustments 75 ( 129 ) Intangible assets – finite life, net at end of period $ 35,414 $ 24,281 Amortization expense of finite life intangible assets was $ 1.7 million and $ 1.4 million for the three months ended March 31, 2023 and 2022, respectively. Amortization over the next five years for finite life intangibles is expected to be $ 5.2 million for the remainder of 2023, $ 6.3 million in 2024, $ 5.2 million in 2025, $ 3.8 million in 2026, and $ 3.6 million in 2027. The Company completes its goodwill and indefinite life intangible asset impairment assessment annually in the fourth quarter, or more often if circumstances require. As a part of its impairment assessment, the Company first qualitatively assesses whether current events or changes in circumstances lead to a determination that it is more likely than not, defined as a likelihood of more than 50 percent, that the fair value of a reporting unit or indefinite life intangible asset is less than its carrying amount. If there is a qualitative determination that the fair value is more likely than not greater than the carrying value, the Company does not quantitatively test for impairment. If this qualitative assessment indicates a more likely than not potential that the asset may be impaired, the estimated fair value is calculated. If the estimated fair value is less than carrying value, an impairment charge is recorded. As of March 31, 2023, the Company reviewed its previous forecasts and assumptions based on its current projections, which are subject to various risks and uncertainties, including projected revenue, projected operational profit, terminal growth rates, and the cost of capital. The Company did not identify any triggering events during the three month period ended March 31, 2023 that would require an interim impairment assessment of goodwill or intangible assets. The Company’s assumptions about future conditions important to its assessment of potential impairment of its goodwill and indefinite life intangible assets are subject to uncertainty, and the Company will continue to monitor these conditions in future periods as new information becomes available, and will update its analysis accordingly.

Accounts Payable and Accrued Ex

Accounts Payable and Accrued Expenses	3 Months Ended
	Mar. 31, 2023
Payables and Accruals [Abstract]
Accounts Payable and Accrued Expenses	6. Accounts Payable and Accrued Expenses Accounts payable and accrued expenses consisted of the following: (in thousands) March 31, 2023 December 31, 2022 Trade accounts payable, including amounts due to subcontractors $ 78,018 $ 73,407 Compensation and related benefits 8,185 9,577 Accrued warranty 3,612 3,691 Contract liability 4,215 4,516 Short-term operating lease liability 3,509 3,228 Other 14,047 12,779 Total accounts payable and accrued expenses $ 111,586 $ 107,198

Senior Debt

Senior Debt	3 Months Ended
	Mar. 31, 2023
Debt Disclosure [Abstract]
Senior Debt	7. Senior Debt Debt consisted of the following: (in thousands) March 31, 2023 December 31, 2022 Outstanding borrowings under the Credit Facility (as defined below) quarterly principal installments of $ 550 through September 2023, 825 through September 2025 and $ 1,100 thereafter with balance due upon maturity in Term loan $ 40,758 $ 41,309 Revolving credit facility 96,100 61,300 Total outstanding borrowings under the Credit Facility 136,858 102,609 Outstanding borrowings under the joint venture term debt 9,680 10,083 Unamortized debt discount ( 1,269 ) ( 1,488 ) Total outstanding borrowings 145,269 111,204 Less: current portion ( 3,854 ) ( 3,579 ) Total debt, less current portion $ 141,415 $ 107,625 Scheduled princ ipal payments under the Credit Facility and joint venture term debt are $ 3.0 million remaining in 2023 , $ 4.9 million in 2024 , $ 5.2 million in 2025 , $ 129.5 million in 2026 , and $ 3.9 million in 2027. Credit Facility As of March 31, 2023 and December 31, 2022, $ 16.5 million and $ 18.9 million of letters of credit were outstanding, respectively. Total unused credit availability, in consideration of borrowing limitations, under the Company’s senior secured term loan and senior secured revolver loan with sub-facilities for letters of credit, swing-line loans and senior secured multi-currency loans (the "Credit Facility") was $ 22.5 million and $ 59.8 million at March 31, 2023 and December 31, 2022, respectively. Revolving loans may be borrowed, repaid and reborrowed until December 17, 2026, at which time all outstanding balances of the Credit Facility must be repaid. At the Company’s option, revolving loans and the term loans accrue interest at a per annum rate based on either the highest of (a) the federal funds rate plus 0.5 %, (b) the Agent’s prime lending rate, (c) Daily Simple SOFR plus the Daily Simple SOFR Adjustment of 0.11448 % plus 1.0%, or (d) 1.0%, plus a margin ranging from 1.75 % to 2.75 % depending on the Company’s Consolidated Leverage Ratio (“Base Rate”), or (d) a one/three/six-month Term SOFR Rate (as defined in the Credit Facility) plus the Term SOFR Adjustment ranging from 0.11 % to 0.43 % p lus 1.75 % to 2.75 % depending on the Company’s Consolidated Leverage Ratio. Interest on swing line loans is the Base Rate. Interest on Base Rate loans is payable quarterly in arrears on the last day of each calendar quarter and at maturity. Interest on Term SOFR rate loans is payable on the last date of each applicable Interest Period (as defined in the agreement), but in no event less than once every three months and at maturity. The weighted average stated interest rate on outstanding borrowings was 7.33 % and 6.75 % at March 31, 2023 and December 31, 2022, respectively. Under the terms of the Credit Facility, the Company is required to maintain certain financial covenants, including the maintenance of a Consolidated Net Leverage Ratio (as defined in the Credit Facility). Through September 30, 2023, the maximum Consolidated Net Leverage Ratio is 3.75 , after which time it will decrease to 3.50 until the end of the term of the Credit Facility. As of March 31, 2023 and December 31, 2022, the Company was in compliance with all related financial and other restrictive covenants under the Credit Facility. Joint Venture Debt On March 7, 2022, the Company's Effox-Flextor-Mader, Inc. joint venture ("EFM JV") entered into a loan agreement secured by the assets of the EFM JV in the aggregate principal amount of $ 11.0 million for the acquisition of General Rubber, LLC ("GRC"). As of March 31, 2023 and December 31, 2022, $ 9.7 million and $ 10.1 million was outstanding under the loan, respectively. Principal will be paid back to the lender monthly with the final installment due by February 27, 2027. Interest is accrued at the per annum rate based on EFM JV's choice of the 1/3/6 month Term SOFR rate plus 3.25%, with a floor rate of 3.75%. Interest is paid monthly on the last day of each month. The interest rate at March 31, 2023 and December 31, 2022 was 8.40 % and 6.60 % , respectively. As of March 31, 2023 and December 31, 2022, the EFM JV was in compliance with all related financial and other restrictive covenants under this loan agreement. This loan balance does not impact the Company’s borrowing capacity or the financial covenants under the Credit Facility. Foreign Debt The Company has a number of bank guarantee facilities and bilateral lines of credit in various foreign countries currently supported by cash, letters of credit or pledged assets and collateral under the Credit Facility. In March 2023, the Company amended the Credit Facility, allowing letters of credit and bank guarantee issuances of up to $ 80.0 million from the bilateral lines of credit secured through pledged assets and collateral under the Credit Facility. As of March 31, 2023 and December 31, 2022, $ 33.2 million and $ 30.4 million in bank guarantees were outstanding, respectively. In addition, a subsidiary of the Company located in the Netherlands has a Euro-denominated bank guarantee agreement secured by local assets under which $ 0.6 million in bank guarantees were outstanding as of March 31, 2023 and December 31, 2022 .

Earnings per Share

Earnings per Share	3 Months Ended
	Mar. 31, 2023
Earnings Per Share [Abstract]
Earnings per Share	8. Earnings per Share The computational components of basic and diluted earnings per share for the three months ended March 31, 2023 and 2022 are as follows: 2023 2022 (in thousands) (for basic and diluted earnings per share) Net income attributable to CECO Environmental Corp. $ 1,978 $ 2,792 Denominator Basic weighted-average shares outstanding 34,442 35,051 Common stock equivalents arising from stock options and restricted stock awards 757 148 Diluted weighted-average shares outstanding 35,199 35,199 Options and restricted stock units included in the computation of diluted earnings per share are calculated using the treasury stock method. For the three months ended March 31, 2023 and 2022, zero and 2.1 million, respectively, of outstanding options and restricted stock units were excluded from the computation of diluted earnings per share due to their having an anti-dilutive effect. Once a restricted stock unit vests, it is included in the computation of weighted average shares outstanding for purposes of basic and diluted earnings per share. Common Stock Repurchase On May 10, 2022, the Company's Board of Directors authorized a share repurchase program under which the Company may purchase up to $ 20.0 million of its outstanding shares of common stock through April 30, 2025. The authorization permits the Company to repurchase shares in the open market, through accelerated share repurchases, block trades, Rule 10b5-1 trading plans or through privately negotiated transactions in accordance with applicable laws, rules and regulations. During the three months ended March 31, 2023 , the Company repurchased zero shares under the program.

Share-Based Compensation

Share-Based Compensation	3 Months Ended
	Mar. 31, 2023
Share-Based Payment Arrangement [Abstract]
Share-Based Compensation	9. Share-Based Compensation The Company accounts for share-based compensation in accordance with Accounting Standards Codification (“ASC”) Topic 718, “Compensation – Stock Compensation,” which requires the Company to recognize compensation expense for share-based awards, measured at the fair value of the awards at the grant date. The Company recognized $ 0.8 million and $ 0.9 million of share-based compensation related expense during the three months ended March 31, 2023 and 2022, respectively. The Company granted approximately 340,000 and 600,000 restricted stock units during the three months ended March 31, 2023 and 2022, respectively. There were 0.1 million and zero options exercised during the three months ended March 31, 2023 and 2022, respectively. The Company received $ 0.6 million and zero in cash from employees and directors exercising options during the three months ended March 31, 2023 and 2022, respectively. The intrinsic value of options exercised during the three months ended March 31, 2023 and 2022 was $ 0.2 million and zero , respectively.

Pension and Employee Benefit Pl

Pension and Employee Benefit Plans	3 Months Ended
	Mar. 31, 2023
Retirement Benefits [Abstract]
Pension and Employee Benefit Plans	10. Pension and Employee Benefit Plans The Company sponsors a non-contributory defined benefit pension plan for certain union employees. The plan is funded in accordance with the funding requirements of the Employee Retirement Income Security Act of 1974. The Company presents the components of net periodic benefit cost (gain) within “Other income (expense), net” on the Condensed Consolidated Statements of Income. Retirement plan expense is based on valuations performed by plan actuaries as of the beginning of each fiscal year. The components of the pension plan expense consisted of the following: Three months ended March 31, (in thousands) 2023 2022 Interest cost $ 318 $ 219 Expected return on plan assets ( 285 ) ( 390 ) Amortization of net actuarial loss 74 66 Net periodic benefit cost (gain) $ 107 $ ( 105 ) The Company made no contributions to its defined benefit plan during the three months ended March 31, 2023 and 2022. For the remainder of 2023, the Company does not expect to make any contributions to fund the pension plan. The unfunded liability of the plan of $ 5.6 million and $ 5.5 million as of March 31, 2023 and December 31, 2022 , respectively, is included in “Other liabilities” on the Condensed Consolidated Balance Sheets.

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2023
Income Tax Disclosure [Abstract]
Income Taxes	11. Income Taxes The Company files income tax returns in various federal, state and local jurisdictions. Tax years from 2018 forward remain open for examination by Federal authorities. Tax years from 2017 forward remain open for all significant s tate and foreign authorities. The Company accounts for uncertain tax positions pursuant to ASC Topic 740, “Income Taxes.” As of March 31, 2023 and December 31, 2022, the liability for uncertain tax positions totaled approximately $ 0.2 million and $ 0.1 million, respectively, which is included in “Other liabilities” on the Condensed Consolidated Balance Sheets. The Company recognizes accrued interest related to uncertain tax positions and penalties, if any, in income tax expense within the Condensed Consolidated Statements of Income. Certain of the Company’s undistributed earnings of our foreign subsidiaries are not permanently reinvested. Since foreign earnings have already been subject to United States income tax in 2017 as a result of the 2017 Tax Cuts and Jobs Act, the Company intends to repatriate foreign-held cash as needed. The Company records deferred income tax attributable to foreign withholding taxes that would become payable should it decide to repatriate cash held in our foreign operations. As of March 31, 2023 and December 31, 2022, the Company recorded deferred income taxes of approximately $ 0.8 million and $ 1.3 million, respectively, on the undistributed earnings of its foreign subsidiaries. Income tax expense was zero and $ 1.1 million for the three months ended March 31, 2023 and 2022, respectively. The effective income tax rate for the three months ended March 31, 2023 was 0.4 % compared with 28.3 % for the three months ended March 31, 2022. The effective income tax rates for the three months ended March 31, 2023 and 2022 differ from the United States federal statutory rate. The Company's effective rate is affected by certain other permanent differences, including state income taxes, non-deductible incentive stock-based compensation and differences in tax rates among jurisdictions in which it operates.

Financial Instruments

Financial Instruments	3 Months Ended
	Mar. 31, 2023
Investments, All Other Investments [Abstract]
Financial Instruments	12. Financial Instruments The Company's financial instruments consist primarily of investments in cash and cash equivalents, receivables and certain other assets, foreign debt and accounts payable, which approximate fair value at March 31, 2023 and December 31, 2022, due to their short-term nature or variable, market-driven interest rates. The fair value of the debt issued under the Credit Facility and joint venture term loan was $ 146.5 million and $ 112.7 million at March 31, 2023 and December 31, 2022, respectively. The fair value was determined considering market conditions, the Company's credit worthiness and the current terms of our debt, which is considered Level 2 on the fair value hierarchy. At March 31, 2023 and December 31, 2022, the Company had cash and cash equivalents of $ 41.2 million and $ 45.5 million, respectively, of which $ 23.9 million and $ 31.7 million, respectively, was held outside of the United States, principally in the Netherlands, United Kingdom, China, and Canada.

Commitments and Contingencies -

Commitments and Contingencies - Legal Matters	3 Months Ended
	Mar. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies - Legal Matters	13. Commitments and Contingencies Asbestos cases The Company's subsidiary, Met-Pro Technologies LLC (“Met-Pro”), beginning in 2002, has been named in asbestos-related lawsuits filed against a large number of industrial companies including, in particular, those in the pump and fluid handling industries. In management’s opinion, the complaints typically have been vague, general and speculative, alleging that Met-Pro, along with the numerous other defendants, sold unidentified asbestos-containing products and engaged in other related actions which caused injuries (including death) and loss to the plaintiffs. Counsel has advised that more recent cases typically allege more serious claims of mesothelioma. The Company’s insurers have hired attorneys who, together with the Company, are vigorously defending these cases. Many cases have been dismissed after the plaintiff fails to produce evidence of exposure to Met-Pro’s products. In those cases, where evidence has been produced, the Company’s experience has been that the exposure levels are low and the Company’s position has been that its products were not a cause of death, injury or loss. The Company has been dismissed from or settled a large number of these cases. Cumulative settlement payments from 2002 through March 31, 2023 for cases involving asbestos-related claims were $ 6.2 m illion which together with all legal fees other than corporate counsel expenses have substantially been paid by the Company’s insurers. The average cost per settled claim, excluding legal fees, was approximately $ 40,000 . Based upon the most recent information available to the Company regarding such claims, there were a total of 268 cases pending against the Company as of March 31, 2023 with Illinois, New York, Pennsylvania and West Virginia having the largest number of cases, as compared with 247 cases that were pending as of December 31, 2022. During the three months ended March 31, 2023, 46 new cases were filed against the Company, and the Company was dismissed from 21 cases and settled four cases. Most of the pending cases have not advanced beyond the early stages of discovery, although a number of cases are on schedules leading to or scheduled for trial. The Company believes that its insurance coverage is adequate for the cases currently pending against the Company and for the foreseeable future, assuming a continuation of the current volume, nature of cases and settlement amounts. However, the Company has no control over the number and nature of cases that are filed against it, nor as to the financial health of its insurers or their position as to coverage. The Company also presently believes that none of the pending cases will have a material adverse impact upon the Company’s results of operations, liquidity or financial condition. Other The Company is also a party to routine contract and employment-related litigation matters, warranty claims and routine audits of state and local tax returns arising in the ordinary course of its business. The final outcome and impact of open matters, and related claims and investigations that may be brought in the future, are subject to many variables, and cannot be predicted. In accordance with ASC 450, “Contingencies,” and related guidance, the Company records accruals for estimated losses relating to claims and lawsuits when available information indicates that a loss is probable and the amount of the loss, or range of loss, can be reasonably estimated. The Company expenses legal costs as they are incurred. The Company is not aware of any pending claims or assessments, other than as described above, which may have a material adverse impact on its liquidity, financial position, results of operations, or cash flows.

Acquisitions and Joint Ventures

Acquisitions and Joint Ventures	3 Months Ended
	Mar. 31, 2023
Business Combinations [Abstract]
Acquisitions and Joint Ventures	14. Acquisitions and Joint Ventures Malvar Engineering Limited On January 10, 2023, the Company acquired 100 % of the equity interests of Malvar Engineering Limited, including its subsidiaries Arkanum Management Limited and Wakefield Acoustics Limited (collectively, "Wakefield"), for $ 4.1 million in cash, which was financed with a draw on the Company’s revolving credit facility, and $ 0.4 million of deferred cash consideration . As additional consideration, the former owners are entitled to earn-out payments based upon specified financial results through July 31, 2023. Based on projections at the acquisition date, the Company estimated the fair value of the earn-out to be $ 0.6 million. As of March 31, 2023, the earnout liability recorded in “Accounts payable and accrued expenses” on the Condensed Consolidated Balance Sheets is $ 0.6 million. Wakefield is a producer of industrial engineered noise control solutions, including custom acoustical gen-set packages, ambient air baffles, acoustical louvres, and skid enclosures, primarily serving server farms for data centers, standby and emergency power generation, oil and gas, petrochemical, commercial construction, infrastructure, and general manufacturing industries. This acquisition advances the Company's position within the industrial silencing and noise attenuation market by adding a range of solutions and access to new geographic markets within the Engineered Systems segment. The following table summarizes the fair values of the assets acquired and liabilities assumed at the date of closing. (in thousands) Current assets $ 3,240 Property and equipment 635 Intangible - finite life 1,778 Goodwill 4,779 Total assets acquired 10,432 Current liabilities assumed ( 4,860 ) Deferred income tax liability ( 444 ) Net assets acquired $ 5,128 The Company acquired customer lists and tradename intangible assets valued at $ 1.5 million and $ 0.3 million, respectively. These assets were determined to have useful lives of 10 years. During the three months ended March 31, 2023 , Wakefield accounted for $ 2.5 million in revenue and $ 0.1 million of net income included in the Company’s results. Transcend Solutions On March 31, 2023, the Company acquired 100 % of the equity interests of Transcend Solutions, LLC ("Transcend") for $ 22.4 million, including $ 20.0 million in cash, which was financed with a draw on the Company’s revolving credit facility, $ 2.4 million of deferred cash consideration, consisting of $ 0.4 million of holdback payable within one year and $ 2.0 million of notes payable due in equal installments over two years . Transcend is a process filtration solution design and manufacturing company with applications in hydrocarbon and chemical processing. This acquisition improves the Company's short-cycle and long-cycle mix and expands the Company's reach into midstream oil and gas, liquified natural gas, hydrocarbon processing, and chemical processing applications within the Engineered Systems segment. The following table summarizes the fair values of the assets acquired and liabilities assumed at the date of closing. (in thousands) Current assets (including cash of $ 52 ) $ 2,614 Property and equipment 1,153 Goodwill 19,601 Other assets 231 Total assets acquired 23,599 Current liabilities assumed ( 1,203 ) Net assets acquired $ 22,396 General Rubber LLC On March 7, 2022, the Company, through the EFM JV, acquired 100 % of the equity interests of General Rubber LLC ("GRC") for $ 19.7 million in cash, which was financed with a combination of a draw on the Company's revolving credit facility and issuance of term debt by the EFM JV. As additional consideration, the former owners of GRC were issued 10 % of the equity interest in the EFM JV, resulting in the Company holding 63 % of the equity in the joint venture. The fair value ascribed to the equity interest of the former owners of GRC was approximately $ 4.1 million. As of March 31, 2023, there were $ 15.2 million in current assets, $ 27.4 million in long-lived assets, and $ 30.1 million in total liabilities related to the EFM JV included in the Condensed Consolidated Balance Sheets. For the three months ended March 31, 2023, the EFM JV accounted for $ 9.4 million in revenue included in the Company's results. GRC engineers and manufactures non-metallic expansion joints and flow control products including rubber expansion joints, ducting expansion joints, and industrial pinch and duck bill valves, serving the industrial water and wastewater markets. The acquisition diversifies and expands the EFM JV product offerings within the Engineered Systems segment. The following table summarizes the fair values of the assets acquired and liabilities assumed at the date of closing. (in thousands) Current assets (including cash of $ 137 ) $ 4,963 Property and equipment 459 Goodwill 11,120 Intangible - finite life 8,380 Total assets acquired 24,922 Current liabilities assumed ( 714 ) Deferred income tax liability ( 388 ) Net assets acquired $ 23,820 The Company acquired customer lists and tradename intangible assets valued at $ 7.7 million and $ 0.7 million, respectively. These assets were determined to have useful lives of 10 years. During the three months ended March 31, 2022, GRC accounted for $ 0.7 million in revenue and $ 0.3 million of net income included in the Company’s results. Compass Water Solutions, Inc. On May 3, 2022, the Company acquired 100 % of the equity interests of Compass Water Solutions, Inc. ("Compass") for $ 9.0 million in cash, which was financed with a draw on the Company’s revolving credit facility, and $ 2.0 million in notes payable to the former owners over two years. As additional consideration, the former owners are entitled to earn-out payments based upon a multiple of specified financial results through April 30, 2023. Based on projections at the acquisition date, the Company estimated the fair value of the earn-out to be $ 1.4 million. As of March 31, 2023, the earnout liability recorded in “Accounts payable and accrued expenses” on the Condensed Consolidated Balance Sheets is $ 1.2 million. Compass is a leading global supplier of membrane-based industrial water and wastewater treatment systems that help customers achieve regulatory compliance of water discharge at the lowest lifecycle cost. The acquisition diversifies and expands the Company's industrial water product offerings within the Engineered Systems segment. The following table summarizes the fair values of the assets acquired and liabilities assumed at the date of closing . (in thousands) Current assets (including cash of $ 334 ) $ 4,796 Property and equipment 101 Goodwill 4,848 Intangible - finite life 4,900 Total assets acquired 14,645 Current liabilities assumed ( 623 ) Deferred income tax liability ( 1,627 ) Net assets acquired $ 12,395 The Company acquired customer lists and tradename intangible assets valued at $ 4.4 million and $ 0.5 million, respectively. These assets were determined to have useful lives of 10 years. Western Air Ducts Ltd. On June 22, 2022, the Company acquired 100 % of the equity interests of Western Air Ducts Limited for $ 10.7 million in cash, which was financed with a draw on the Company’s revolving credit facility, and deferred cash consideration of $ 0.8 million payable in one year. Western Air Ducts is a leading European supplier of dust and fume extraction solutions, providing consultation, design, manufacturing, installation, and service. The acquisition diversifies and expands the Company's industrial air product offerings within the Industrial Process Solutions segment. The following table summarizes the fair values of the assets acquired and liabilities assumed at the date of closing. (in thousands) Current assets (including cash of $ 1,557 ) $ 2,711 Property and equipment 188 Goodwill 7,344 Intangible - finite life 3,158 Total assets acquired 13,401 Current liabilities assumed ( 1,127 ) Deferred income tax liability ( 824 ) Net assets acquired $ 11,450 The Company acquired customer lists and tradename intangible assets valued at $ 2.8 million and $ 0.4 million, respectively. These assets were determined to have useful lives of 10 years. DS21 Co., Ltd. On September 19, 2022, the Company acquired 100 % of the equity interests of DS21 Co., Ltd. ("DS21") for $ 9.2 million, including $ 8.9 million in cash, which was financed with a draw on the Company’s revolving credit facility, and deferred cash consideration of $ 0.3 million payable in one year. DS21 is a South Korean-based design and manufacturing firm specializing in innovative water and wastewater treatment solutions. The addition of DS21 advances the Company's leadership position in niche oily water and produced water treatment, demineralization water treatment and ultra-pure water supply applications within the Company's Engineered Systems segment. The following table summarizes the fair values of the assets acquired and liabilities assumed at the date of closing. (in thousands) Current assets (including cash of $ 1,453 ) $ 5,099 Property and equipment 4,112 Intangible - finite life 422 Deferred income taxes 557 Other assets 169 Total assets acquired 10,359 Current liabilities assumed ( 1,008 ) Other liabilities ( 113 ) Net assets acquired $ 9,238 The Company acquired customer lists and tradename intangible assets valued at $ 0.1 million and $ 0.3 million, respectively. These assets were determined to have useful lives of 10 years. The Company has finalized the valuation of assets acquired and liabilities assumed related to the acquisition of GRC. The approximate fair values of the assets acquired and liabilities assumed related to the remaining acquisitions are based on preliminary estimates and assumptions. These preliminary estimates and assumptions could change significantly during the purchase price measurement period as the Company finalizes the valuation of assets acquired and liabilities assumed. These changes could result in material variances between the Company's future financial results, including variances in the estimated purchase price, fair values recorded and expenses associated with these items. Goodwill recognized represents value the Company expects to be created by combining the various operations of the acquired businesses with the Company’s operations, including the expansion into markets within existing business segments, access to new customers and potential cost savings and synergies. Goodwill related to this acquisition is not deductible for tax purposes. The following unaudited pro forma financial information represents the Company’s results of operations as if these acquisitions had occurred at the beginning of the fiscal year prior to the acquisition: Three months ended March 31, (in thousands, except per share data) 2023 2022 Net sales $ 116,116 $ 103,015 Net income attributable to CECO Environmental Corp. $ 2,021 $ 2,662 Earnings per share: Basic $ 0.06 $ 0.08 Diluted $ 0.06 $ 0.08 The pro forma results have been prepared for informational purposes only and include adjustments to amortize acquired intangible assets with finite life, reflect additional interest expense on debt used to fund the acquisition, and to record the income tax consequences of the pro forma adjustments. These pro forma results do not purport to be indicative of the results of operations that would have occurred had the purchase been made as of the beginning of the periods presented or of the results of operations that may occur in the future.

Business Segment Information

Business Segment Information	3 Months Ended
	Mar. 31, 2023
Segment Reporting [Abstract]
Business Segment Information	15. Business Segment Information The Company’s operations are organized and reviewed by management along with its solutions or end markets that the segment serves and presented in two reportable segments. The results of the segments are reviewed through the “Income from operations” line on the Condensed Consolidated Statements of Income . The Company’s reportable segments are organized as groups of similar products and services, as described as follows: Engineered Systems segment: The Engineered Systems segment serves the power generation, hydrocarbon processing, water/wastewater treatment, oily water separation and treatment, marine and naval vessels, and midstream oil & gas sectors. We are a key part of helping meet the global demand for environmental and equipment protection solutions with our highly engineered platforms including emissions control, fluid bed cyclones, thermal acoustics, separation & filtration, and dampers & expansion joints. Industrial Process Solutions segment: The Industrial Process Solutions segment serves the broad industrial sector with solutions for air pollution and contamination control, fluid handling, and process filtration in applications such as aluminum beverage can production, automobile production, food and beverage processing, semiconductor fabrication, electronics production, steel and aluminum mill processing, wood manufacturing, desalination, and aquaculture markets. For Industrial Air applications, we assist companies maintain clean and safe operations for employees, reduce energy consumption, minimize waste for customers, and meet regulatory standards for toxic emissions, fumes, volatile organic compounds, and odor elimination through our platforms including duct fabrication & installation, industrial air, and fluid handling. The financial segment information is as follows: Three months ended March 31, (in thousands) 2023 2022 Net sales (less intra-, inter-segment sales) Engineered Systems segment $ 74,454 $ 56,975 Industrial Process Solutions segment 38,109 35,461 Total net sales $ 112,563 $ 92,436 Three months ended March 31, (in thousands) 2023 2022 Income from operations Engineered Systems segment $ 9,805 $ 6,470 Industrial Process Solutions segment 5,546 4,139 Corporate and Other (1) ( 9,890 ) ( 5,407 ) Total income from operations $ 5,461 $ 5,202 (1) Includes corporate compensation, professional services, information technology, and other general and administrative corporate expenses. Three months ended March 31, (in thousands) 2023 2022 Property and equipment additions Engineered Systems segment $ 244 $ 5 Industrial Process Solutions segment 1,399 73 Corporate and Other 870 587 Total property and equipment additions $ 2,513 $ 665 Three months ended March 31, (in thousands) 2023 2022 Depreciation and amortization Engineered Systems segment $ 1,212 $ 895 Industrial Process Solutions segment 1,158 1,050 Corporate and Other 515 343 Total depreciation and amortization $ 2,885 $ 2,288 (in thousands) March 31, 2023 December 31, 2022 Identifiable assets Engineered Systems segment $ 394,204 $ 332,820 Industrial Process Solutions segment 153,647 150,458 Corporate and Other (2) 19,717 21,443 Total identifiable assets $ 567,568 $ 504,721 (2) Corporate and Other assets consist primarily of cash and income tax related assets. (in thousands) March 31, 2023 December 31, 2022 Goodwill Engineered Systems segment $ 139,159 $ 114,746 Industrial Process Solutions segment 68,629 68,451 Total goodwill $ 207,788 $ 183,197 Intra-segment and Inter-segment Revenues The Company has multiple divisions that sell to each other within segments (intra-segment sales) and between segments (inter-segment sales), as follows: Three months ended March 31, 2023 Less Inter-Segment Sales (in thousands) Total Intra- Industrial Process Solutions Engineered Systems Net Sales to Net sales Engineered Systems segment $ 76,089 $ ( 1,538 ) $ ( 97 ) $ — $ 74,454 Industrial Process Solutions segment 39,042 ( 835 ) — ( 98 ) 38,109 Total net sales $ 115,131 $ ( 2,373 ) $ ( 97 ) $ ( 98 ) $ 112,563 Three months ended March 31, 2022 Less Inter-Segment Sales (in thousands) Total Intra- Industrial Process Solutions Engineered Systems Net Sales to Net sales Engineered Systems segment $ 61,600 $ ( 4,558 ) $ ( 67 ) $ — $ 56,975 Industrial Process Solutions segment 37,142 ( 1,625 ) — ( 56 ) 35,461 Total net sales $ 98,742 $ ( 6,183 ) $ ( 67 ) $ ( 56 ) $ 92,436

New Financial Accounting Pron_2

New Financial Accounting Pronouncements (Policies)	3 Months Ended
	Mar. 31, 2023
Accounting Changes and Error Corrections [Abstract]
Accounting Standards Adopted in Fiscal 2023	Accounting Standards Adopted in Fiscal 2023 On January 1, 2023, the beginning of the Company's fiscal year, the Company adopted Accounting Standards Update ("ASU") 2021-08, Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers, which addresses how an acquirer should recognize and measure revenue contracts acquired in a business combination. The adoption of ASU 2021-08 did not have a material impact on the Company's financial statements.
Accounting Standards to be Adopted	Accounting Standards to be Adopted None.

Accounts Receivable (Tables)

Accounts Receivable (Tables)	3 Months Ended
	Mar. 31, 2023
Receivables [Abstract]
Summary of Accounts Receivable	Accounts receivable consisted of the following: (in thousands) March 31, 2023 December 31, 2022 Accounts receivable $ 114,044 $ 87,306 Allowance for doubtful accounts ( 4,155 ) ( 4,220 ) Total accounts receivable, net $ 109,889 $ 83,086

Inventories (Tables)

Inventories (Tables)	3 Months Ended
	Mar. 31, 2023
Inventory Disclosure [Abstract]
Summary of Inventories	Inventories consisted of the following: (in thousands) March 31, 2023 December 31, 2022 Raw materials $ 21,661 $ 19,774 Work in process 9,091 7,183 Finished goods 2,466 2,436 Obsolescence allowance ( 2,920 ) ( 2,867 ) Total inventories $ 30,298 $ 26,526

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill / Tradename	Goodwill activity for the three months ended March 31, 2023 and the year ended December 31, 2022 was as follows: (in thousands) Three months ended March 31, 2023 Year ended December 31, 2022 Goodwill / Tradename Goodwill Tradename Goodwill Tradename Balance at beginning of period $ 183,197 $ 9,508 $ 161,183 $ 9,629 Acquisitions 24,380 — 23,312 — Foreign currency translation 211 28 ( 1,298 ) ( 121 ) Balance at end of period $ 207,788 $ 9,536 $ 183,197 $ 9,508
Intangible Assets - Finite Life	Finite life intangible assets consisted of the following: March 31, 2023 December 31, 2022 (in thousands) Cost Accum. Amort. Cost Accum. Amort. Technology $ 14,457 $ 13,799 $ 14,457 $ 13,729 Customer lists 87,151 58,877 85,719 57,540 Tradename 11,934 4,051 11,604 3,768 Foreign currency adjustments ( 1,607 ) ( 206 ) ( 1,864 ) ( 372 ) Total intangible assets – finite life $ 111,935 $ 76,521 $ 109,916 $ 74,665
Summary of Finite Lived Intangible Assets Activities	Finite life intangible asset activity for the three months ended March 31, 2023 and 2022 was as follows: (in thousands) 2023 2022 Intangible assets – finite life, net at beginning of period $ 35,251 $ 25,841 Amortization expense ( 1,690 ) ( 1,431 ) Acquisitions 1,778 — Foreign currency adjustments 75 ( 129 ) Intangible assets – finite life, net at end of period $ 35,414 $ 24,281

Accounts Payable and Accrued _2

Accounts Payable and Accrued Expenses (Tables)	3 Months Ended
	Mar. 31, 2023
Payables and Accruals [Abstract]
Summary of Accounts Payable and Accrued Expenses	Accounts payable and accrued expenses consisted of the following: (in thousands) March 31, 2023 December 31, 2022 Trade accounts payable, including amounts due to subcontractors $ 78,018 $ 73,407 Compensation and related benefits 8,185 9,577 Accrued warranty 3,612 3,691 Contract liability 4,215 4,516 Short-term operating lease liability 3,509 3,228 Other 14,047 12,779 Total accounts payable and accrued expenses $ 111,586 $ 107,198

Senior Debt (Tables)

Senior Debt (Tables)	3 Months Ended
	Mar. 31, 2023
Debt Disclosure [Abstract]
Summary of Debt	Debt consisted of the following: (in thousands) March 31, 2023 December 31, 2022 Outstanding borrowings under the Credit Facility (as defined below) quarterly principal installments of $ 550 through September 2023, 825 through September 2025 and $ 1,100 thereafter with balance due upon maturity in Term loan $ 40,758 $ 41,309 Revolving credit facility 96,100 61,300 Total outstanding borrowings under the Credit Facility 136,858 102,609 Outstanding borrowings under the joint venture term debt 9,680 10,083 Unamortized debt discount ( 1,269 ) ( 1,488 ) Total outstanding borrowings 145,269 111,204 Less: current portion ( 3,854 ) ( 3,579 ) Total debt, less current portion $ 141,415 $ 107,625

Earnings per Share (Tables)

Earnings per Share (Tables)	3 Months Ended
	Mar. 31, 2023
Earnings Per Share [Abstract]
Number of Shares Outstanding for Calculation of Earnings Per Share	The computational components of basic and diluted earnings per share for the three months ended March 31, 2023 and 2022 are as follows: 2023 2022 (in thousands) (for basic and diluted earnings per share) Net income attributable to CECO Environmental Corp. $ 1,978 $ 2,792 Denominator Basic weighted-average shares outstanding 34,442 35,051 Common stock equivalents arising from stock options and restricted stock awards 757 148 Diluted weighted-average shares outstanding 35,199 35,199

Pension and Employee Benefit _2

Pension and Employee Benefit Plans (Tables)	3 Months Ended
	Mar. 31, 2023
Retirement Benefits [Abstract]
Components of Pension and Employee Benefit Expenses	Retirement plan expense is based on valuations performed by plan actuaries as of the beginning of each fiscal year. The components of the pension plan expense consisted of the following: Three months ended March 31, (in thousands) 2023 2022 Interest cost $ 318 $ 219 Expected return on plan assets ( 285 ) ( 390 ) Amortization of net actuarial loss 74 66 Net periodic benefit cost (gain) $ 107 $ ( 105 )

Acquisitions and Joint Ventur_2

Acquisitions and Joint Ventures (Tables)	3 Months Ended
	Mar. 31, 2023
Schedule of Unaudited Pro Forma Financial Information	The following unaudited pro forma financial information represents the Company’s results of operations as if these acquisitions had occurred at the beginning of the fiscal year prior to the acquisition: Three months ended March 31, (in thousands, except per share data) 2023 2022 Net sales $ 116,116 $ 103,015 Net income attributable to CECO Environmental Corp. $ 2,021 $ 2,662 Earnings per share: Basic $ 0.06 $ 0.08 Diluted $ 0.06 $ 0.08
General Rubber LLC [Member]
Schedule of Estimated Fair Values of Assets Acquired and Liabilities Assumed	The following table summarizes the fair values of the assets acquired and liabilities assumed at the date of closing. (in thousands) Current assets (including cash of $ 137 ) $ 4,963 Property and equipment 459 Goodwill 11,120 Intangible - finite life 8,380 Total assets acquired 24,922 Current liabilities assumed ( 714 ) Deferred income tax liability ( 388 ) Net assets acquired $ 23,820
Compass Water Solutions, Inc [Member]
Schedule of Estimated Fair Values of Assets Acquired and Liabilities Assumed	The following table summarizes the fair values of the assets acquired and liabilities assumed at the date of closing . (in thousands) Current assets (including cash of $ 334 ) $ 4,796 Property and equipment 101 Goodwill 4,848 Intangible - finite life 4,900 Total assets acquired 14,645 Current liabilities assumed ( 623 ) Deferred income tax liability ( 1,627 ) Net assets acquired $ 12,395
Malvar Engineering Limited [Member]
Schedule of Estimated Fair Values of Assets Acquired and Liabilities Assumed	The following table summarizes the fair values of the assets acquired and liabilities assumed at the date of closing. (in thousands) Current assets $ 3,240 Property and equipment 635 Intangible - finite life 1,778 Goodwill 4,779 Total assets acquired 10,432 Current liabilities assumed ( 4,860 ) Deferred income tax liability ( 444 ) Net assets acquired $ 5,128
Western Air Ducts Ltd [Member]
Schedule of Estimated Fair Values of Assets Acquired and Liabilities Assumed	The following table summarizes the fair values of the assets acquired and liabilities assumed at the date of closing. (in thousands) Current assets (including cash of $ 1,557 ) $ 2,711 Property and equipment 188 Goodwill 7,344 Intangible - finite life 3,158 Total assets acquired 13,401 Current liabilities assumed ( 1,127 ) Deferred income tax liability ( 824 ) Net assets acquired $ 11,450
Transcend Solution [Member]
Schedule of Estimated Fair Values of Assets Acquired and Liabilities Assumed	The following table summarizes the fair values of the assets acquired and liabilities assumed at the date of closing. (in thousands) Current assets (including cash of $ 52 ) $ 2,614 Property and equipment 1,153 Goodwill 19,601 Other assets 231 Total assets acquired 23,599 Current liabilities assumed ( 1,203 ) Net assets acquired $ 22,396
DS21 Co., Ltd.
Schedule of Estimated Fair Values of Assets Acquired and Liabilities Assumed	The following table summarizes the fair values of the assets acquired and liabilities assumed at the date of closing. (in thousands) Current assets (including cash of $ 1,453 ) $ 5,099 Property and equipment 4,112 Intangible - finite life 422 Deferred income taxes 557 Other assets 169 Total assets acquired 10,359 Current liabilities assumed ( 1,008 ) Other liabilities ( 113 ) Net assets acquired $ 9,238

Business Segment Information (T

Business Segment Information (Tables)	3 Months Ended
	Mar. 31, 2023
Segment Reporting [Abstract]
Net Sales and Income from Operation by Business Segment	The financial segment information is as follows: Three months ended March 31, (in thousands) 2023 2022 Net sales (less intra-, inter-segment sales) Engineered Systems segment $ 74,454 $ 56,975 Industrial Process Solutions segment 38,109 35,461 Total net sales $ 112,563 $ 92,436 Three months ended March 31, (in thousands) 2023 2022 Income from operations Engineered Systems segment $ 9,805 $ 6,470 Industrial Process Solutions segment 5,546 4,139 Corporate and Other (1) ( 9,890 ) ( 5,407 ) Total income from operations $ 5,461 $ 5,202 Includes corporate compensation, professional services, information technology, and other general and administrative corporate expenses.
Property and Equipment Additions, Depreciation and Amortization and Identifiable Assets	Three months ended March 31, (in thousands) 2023 2022 Property and equipment additions Engineered Systems segment $ 244 $ 5 Industrial Process Solutions segment 1,399 73 Corporate and Other 870 587 Total property and equipment additions $ 2,513 $ 665 Three months ended March 31, (in thousands) 2023 2022 Depreciation and amortization Engineered Systems segment $ 1,212 $ 895 Industrial Process Solutions segment 1,158 1,050 Corporate and Other 515 343 Total depreciation and amortization $ 2,885 $ 2,288 (in thousands) March 31, 2023 December 31, 2022 Identifiable assets Engineered Systems segment $ 394,204 $ 332,820 Industrial Process Solutions segment 153,647 150,458 Corporate and Other (2) 19,717 21,443 Total identifiable assets $ 567,568 $ 504,721 (2) Corporate and Other assets consist primarily of cash and income tax related assets.
Goodwill	(in thousands) March 31, 2023 December 31, 2022 Goodwill Engineered Systems segment $ 139,159 $ 114,746 Industrial Process Solutions segment 68,629 68,451 Total goodwill $ 207,788 $ 183,197
Intra-Segment and Inter-Segment Revenues	The Company has multiple divisions that sell to each other within segments (intra-segment sales) and between segments (inter-segment sales), as follows: Three months ended March 31, 2023 Less Inter-Segment Sales (in thousands) Total Intra- Industrial Process Solutions Engineered Systems Net Sales to Net sales Engineered Systems segment $ 76,089 $ ( 1,538 ) $ ( 97 ) $ — $ 74,454 Industrial Process Solutions segment 39,042 ( 835 ) — ( 98 ) 38,109 Total net sales $ 115,131 $ ( 2,373 ) $ ( 97 ) $ ( 98 ) $ 112,563 Three months ended March 31, 2022 Less Inter-Segment Sales (in thousands) Total Intra- Industrial Process Solutions Engineered Systems Net Sales to Net sales Engineered Systems segment $ 61,600 $ ( 4,558 ) $ ( 67 ) $ — $ 56,975 Industrial Process Solutions segment 37,142 ( 1,625 ) — ( 56 ) 35,461 Total net sales $ 98,742 $ ( 6,183 ) $ ( 67 ) $ ( 56 ) $ 92,436

Accounts Receivable - Summary o

Accounts Receivable - Summary of Accounts Receivable (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	$ 114,044	$ 87,306
Allowance for doubtful accounts	(4,155)	(4,220)
Total accounts receivable, net	$ 109,889	$ 83,086

Accounts Receivable - Additiona

Accounts Receivable - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Receivables [Abstract]
Amount billed but not received under retainage provisions in contracts	$ 1,500		$ 1,600
Provision for credit losses	$ 100	$ 0

Inventories - Summary of Invent

Inventories - Summary of Inventories (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Inventory, Net [Abstract]
Raw materials	$ 21,661	$ 19,774
Work in process	9,091	7,183
Finished goods	2,466	2,436
Obsolescence allowance	(2,920)	(2,867)
Total inventories	$ 30,298	$ 26,526

Inventories - Additional Inform

Inventories - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Inventory Disclosure [Abstract]
Amounts credited to the allowance for obsolete inventory	$ 0.2	$ 0.2

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets - Goodwill / Tradename (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill, beginning balance	$ 183,197	$ 161,183
Goodwill, Acquisitions	24,380	23,312
Goodwill, foreign currency translation	211	(1,298)
Goodwill, ending balance	207,788	183,197
Tradename, beginning balance	9,508	9,629
Tradename, Acquisitions	0	0
Tradename, foreign currency translation	28	(121)
Tradename, ending balance	$ 9,536	$ 9,508

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets - Intangible Assets - Finite Life (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Cost	$ 111,935	$ 109,916
Accumulated Amortization	76,521	74,665
Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	14,457	14,457
Accumulated Amortization	13,799	13,729
Customer Lists [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	87,151	85,719
Accumulated Amortization	58,877	57,540
Tradename [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	11,934	11,604
Accumulated Amortization	4,051	3,768
Foreign Currency Adjustments [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	(1,607)	(1,864)
Accumulated Amortization	$ (206)	$ (372)

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets - Finite Lived Intangible Assets Amortization Expense (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible assets – finite life, net at beginning of period	$ 35,251	$ 25,841
Amortization expense	(1,690)	(1,431)
Acquisition	1,778
Foreign currency adjustments	75	(129)
Intangible assets – finite life, net at end of period	$ 35,414	$ 24,281

Goodwill and Intangible Asset_5

Goodwill and Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Schedule Of Goodwill And Other Intangible Assets [Line Items]
Amortization expense of finite life intangible assets	$ 1,690	$ 1,431
Amortization expense of finite life intangibles for 2023	5,200
Amortization expense of finite life intangibles for 2027	6,300
Amortization expense of finite life intangibles for 2024	5,200
Amortization expense of finite life intangibles for 2025	3,800
Amortization expense of finite life intangibles for 2026	$ 3,600

Accounts Payable and Accrued _3

Accounts Payable and Accrued Expenses - Summary of Accounts Payable and Accrued Expenses (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Payables and Accruals [Abstract]
Trade accounts payable, including amounts due to subcontractors	$ 78,018	$ 73,407
Compensation and related benefits	8,185	9,577
Accrued warranty	3,612	3,691
Contract liability	4,215	4,516
Short-term lease liability	3,509	3,228
Other	14,047	12,779
Total accounts payable and accrued expenses	$ 111,586	$ 107,198

Senior Debt - Summary of Debt (

Senior Debt - Summary of Debt (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Total outstanding borrowings under the Credit Facility	$ 145,269	$ 111,204
Less: current portion	(3,854)	(3,579)
Debt, less current portion	141,415	107,625
Term Loan [Member]
Debt Instrument [Line Items]
Total outstanding borrowings under the Credit Facility	40,758	41,309
Revolving Credit Loan [Member]
Debt Instrument [Line Items]
Revolving credit facility	96,100	61,300
Senior Debt [Member]
Debt Instrument [Line Items]
Total outstanding borrowings under the Credit Facility	136,858	102,609
Line Of Credit [Member]
Debt Instrument [Line Items]
Outstanding borrowing under the joint venture term debt	9,680	10,083
Term Debt [Member]
Debt Instrument [Line Items]
Unamortized debt discount	$ (1,269)	$ (1,488)

Senior Debt - Summary of Debt_2

Senior Debt - Summary of Debt (Parenthetical) (Detail) - Term Loan [Member] $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($)
Debt Instrument [Line Items]
Frequency of periodic payment	quarterly
Debt Instrument, Redemption, Through September 2025 [Member]
Debt Instrument [Line Items]
Outstanding borrowings, quarterly principal installments payable amount	$ 825
Debt Instrument, Redemption, Through June 2023 [Member]
Debt Instrument [Line Items]
Outstanding borrowings, quarterly principal installments payable amount	550
Debt Instrument, Redemption, Thereafter [Member]
Debt Instrument [Line Items]
Outstanding borrowings, quarterly principal installments payable amount	$ 1,100

Senior Debt - Additional Inform

Senior Debt - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Mar. 07, 2022
Line Of Credit Facility [Line Items]
Credit facility principal payments 2023	$ 3
Credit facility principal payments 2024	4.9
Credit facility principal payments 2025	5.2
Credit facility principal payments 2026	129.5
Credit facility principal payments 2027	$ 3.9
Weighted average interest rate on outstanding borrowings	7.33%	6.75%
Maximum consolidated leverage ratio	3.75%	3.50%
EFM JV [Member]
Line Of Credit Facility [Line Items]
Weighted average interest rate on outstanding borrowings	8.40%	6.60%
Credit Agreement [Member]
Line Of Credit Facility [Line Items]
Unused credit availability under credit facility	$ 22.5	$ 59.8
Credit Agreement [Member] | EFM JV [Member]
Line Of Credit Facility [Line Items]
Secured Debt			$ 11
Federal Funds Rate [Member]
Line Of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.50%
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Line Of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.11448%
Minimum [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Line Of Credit Facility [Line Items]
Maximum consolidated leverage ratio	1.75%
Minimum [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Credit Agreement [Member]
Line Of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.11%
Minimum [Member] | Base Rate [Member]
Line Of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.75%
Maximum [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Line Of Credit Facility [Line Items]
Maximum consolidated leverage ratio	2.75%
Maximum [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Credit Agreement [Member]
Line Of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.43%
Maximum [Member] | Base Rate [Member]
Line Of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	2.75%
Letters of Credit [Member]
Line Of Credit Facility [Line Items]
Aggregate principal amount outstanding under the credit facilities	$ 16.5	18.9
Letters of Credit [Member] | EFM JV [Member]
Line Of Credit Facility [Line Items]
Aggregate principal amount outstanding under the credit facilities	9.7	10.1
Bank Guarantees [Member]
Line Of Credit Facility [Line Items]
Bank guarantee issuance under bilateral lines and collateral	80
Bank guarantee agreement outstanding amount	33.2	30.4
Netherlands Facility [Member] | Euro-Denominated Bank Guarantee [Member]
Line Of Credit Facility [Line Items]
Bank guarantee agreement outstanding amount	$ 0.6	$ 0.6

Earnings per Share - Number of

Earnings per Share - Number of Shares Outstanding for Calculation of Earnings Per Share (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Earnings Per Share [Abstract]
Net loss attributable to CECO Environmental Corp.	$ 1,978	$ 2,792
Denominator
Basic weighted-average shares outstanding	34,441,905	35,051,034
Common stock equivalents arising from stock options and restricted stock awards	757,000	148,000
Diluted weighted-average shares outstanding	35,198,668	35,199,201

Earnings per Share - Additional

Earnings per Share - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	May 10, 2022
Earnings And Dividends Per Share [Abstract]
Anti-dilutive options and restricted stock units outstanding	0	2,100,000
Purchase of outstanding shares of common stock			$ 20
Repurchase of common stock (in shares)	0

Share-Based Compensation - Addi

Share-Based Compensation - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Recognized share-based compensation awards	$ 0.8	$ 0.9
Non-Employee Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash received from employee stock option exercised	$ 0.6	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	100,000	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value	$ 0.2	$ 0
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted stock awards granted	340,000	600,000

Pension and Employee Benefit _3

Pension and Employee Benefit Plans - Components of Pension and Employee Benefit Expenses (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost (gain)	$ 107	$ (105)
Health Care Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	318	219
Expected return on plan assets	285	390
Amortization of net actuarial loss	$ (74)	$ (66)

Pension and Employee Benefit _4

Pension and Employee Benefit Plans - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Retirement Benefits [Abstract]
Defined benefit plan contributions	$ 0	$ 0
Unfunded liability plans	$ 5,600		$ 5,500

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Income Taxes [Line Items]
Liability for uncertain tax positions	$ 200	$ 100
Income tax expense	$ 10		$ 1,112
Effective income tax rate	0.40%		28.30%
Foreign Subsidiaries [Member]
Income Taxes [Line Items]
Deferred income taxes on undistributed earnings	$ 800	$ 1,300
Federal Authorities [Member]
Income Taxes [Line Items]
Open tax years	2018
State and Foreign Authorities [Member]
Income Taxes [Line Items]
Open tax years	2017

Financial Instruments - Additio

Financial Instruments - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Fair Value Of Financial Instruments [Line Items]
Cash and cash equivalents	$ 41,233	$ 45,522
Cash held outside United States, principally in Netherlands, United Kingdom, China, and Canada	23,900	31,700
Credit Facility [Member]
Fair Value Of Financial Instruments [Line Items]
Fair value of debt issued	$ 146,500	$ 112,700

Commitments and Contingencies_2

Commitments and Contingencies - Legal Matters - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2023 USD ($)	Dec. 31, 2022 Case
Commitments and Contingencies Disclosure [Abstract]
Cumulative settlement payments for cases involving asbestos-related claims	$ 6,200,000
Average cost per settled claim excluding legal fees	$ 40,000
Number of claims pending | Case		247
Assessment regarding Loss contingency impact Description	not aware of any pending claims or assessments, other than as described above, which may have a material adverse impact on its liquidity, financial position, results of operations, or cash flows.

Acquisitions and Joint Ventur_3

Acquisitions and Joint Ventures - Additional Information (Detail) - USD ($)		3 Months Ended
	Mar. 07, 2022	Mar. 31, 2023	Mar. 31, 2022	Jan. 10, 2023	Dec. 31, 2022	Sep. 19, 2022	Jun. 22, 2022	May 03, 2022
Business Acquisition Contingent Consideration [Line Items]
Assets Current		$ 275,452,000			$ 240,658,000
Liabilities		345,386,000			$ 286,573,000
Pre tax loss		2,479,000	$ 3,922,000
Malvar Engineering Limited [Member]
Business Acquisition Contingent Consideration [Line Items]
Acquisition of equity				100%
Contingent consideration				$ 4,100,000
Earn out, Fair value				600,000
Accounts payable and accrued expenses				600,000
Deferred cash consideration				400,000
Net revenue		100,000
Net assets acquired				$ 5,128,000
Revenues		2,500,000
Malvar Engineering Limited [Member] | Customer Lists [Member]
Business Acquisition Contingent Consideration [Line Items]
Acquired intangible assets		1,500,000
Malvar Engineering Limited [Member] | Tradename [Member]
Business Acquisition Contingent Consideration [Line Items]
Acquired intangible assets		$ 300,000
Malvar Engineering Limited [Member] | Customer Lists and Tradename [Member]
Business Acquisition Contingent Consideration [Line Items]
Intangible assets, Useful Life		10 years
Transcend Solution [Member]
Business Acquisition Contingent Consideration [Line Items]
Acquisition of equity		100%
Contingent consideration		$ 20,000,000
Holdback Payble		400,000
Notes Payable		2,000,000
Deferred cash consideration		22,400,000
Net assets acquired		22,396,000
Transcend Solution [Member] | Revolving Credit Facility [Member]
Business Acquisition Contingent Consideration [Line Items]
Deferred cash consideration		2,400,000
General Rubber LLC [Member]
Business Acquisition Contingent Consideration [Line Items]
Gain (Loss) on Sales of Loans, Net		116,116,000	103,015,000
Net revenue			300
Net assets acquired	$ 23,820,000
Revenues			$ 700,000
General Rubber LLC [Member] | Other Non Investees [Member]
Business Acquisition Contingent Consideration [Line Items]
Percentage of equity method investment in joint venture	63%
General Rubber LLC [Member] | Customer Lists [Member]
Business Acquisition Contingent Consideration [Line Items]
Acquired intangible assets		7,700,000
General Rubber LLC [Member] | Tradename [Member]
Business Acquisition Contingent Consideration [Line Items]
Acquired intangible assets		$ 700,000
General Rubber LLC [Member] | Customer Lists and Tradename [Member]
Business Acquisition Contingent Consideration [Line Items]
Intangible assets, Useful Life		10 years
Compass Water Solutions, Inc [Member]
Business Acquisition Contingent Consideration [Line Items]
Acquisition of equity								100%
Contingent consideration								$ 9,000,000
Notes Payable								2,000,000
Earn out, Fair value								1,400,000
Accounts payable and accrued expenses								1,200,000
Net assets acquired								$ 12,395,000
Compass Water Solutions, Inc [Member] | Customer Lists [Member]
Business Acquisition Contingent Consideration [Line Items]
Acquired intangible assets		$ 4,400,000
Compass Water Solutions, Inc [Member] | Tradename [Member]
Business Acquisition Contingent Consideration [Line Items]
Acquired intangible assets		$ 500,000
Compass Water Solutions, Inc [Member] | Customer Lists and Tradename [Member]
Business Acquisition Contingent Consideration [Line Items]
Intangible assets, Useful Life		10 years
Western Air Ducts Ltd [Member]
Business Acquisition Contingent Consideration [Line Items]
Acquisition of equity							100%
Contingent consideration							$ 10,700,000
Deferred cash consideration							800,000
Net assets acquired							$ 11,450,000
Western Air Ducts Ltd [Member] | Customer Lists [Member]
Business Acquisition Contingent Consideration [Line Items]
Acquired intangible assets		$ 2,800,000
Western Air Ducts Ltd [Member] | Tradename [Member]
Business Acquisition Contingent Consideration [Line Items]
Acquired intangible assets		$ 400,000
Western Air Ducts Ltd [Member] | Customer Lists and Tradename [Member]
Business Acquisition Contingent Consideration [Line Items]
Intangible assets, Useful Life		10 years
DS21 Co., Ltd.
Business Acquisition Contingent Consideration [Line Items]
Acquisition of equity						100%
Contingent consideration						$ 8,900,000
Deferred cash consideration						9,200,000
Net assets acquired						9,238,000
DS21 Co., Ltd. | Revolving Credit Facility [Member]
Business Acquisition Contingent Consideration [Line Items]
Deferred cash consideration						$ 300,000
DS21 Co., Ltd. | Customer Lists [Member]
Business Acquisition Contingent Consideration [Line Items]
Acquired intangible assets		$ 100,000
DS21 Co., Ltd. | Tradename [Member]
Business Acquisition Contingent Consideration [Line Items]
Acquired intangible assets		$ 300,000
DS21 Co., Ltd. | Customer Lists and Tradename [Member]
Business Acquisition Contingent Consideration [Line Items]
Intangible assets, Useful Life		10 years
Joint Venture Agreement [Member]
Business Acquisition Contingent Consideration [Line Items]
Acquisition of equity	100%
Contingent consideration	$ 19,700,000
Fair value	$ 4,100,000
Percentage of equity hold in joint venture	10%
Assets Current		$ 15,200,000
Noncurrent Assets		27,400,000
Liabilities		30,100,000
Revenues		$ 9,400,000

Acquisitions and Joint Ventur_4

Acquisitions and Joint Ventures - Schedule of Estimated Fair Values of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Jan. 10, 2023	Dec. 31, 2022	Sep. 19, 2022	Jun. 22, 2022	May 03, 2022	Mar. 07, 2022	Dec. 31, 2021
Business Acquisition [Line Items]
Goodwill	$ 207,788		$ 183,197					$ 161,183
General Rubber LLC [Member]
Business Acquisition [Line Items]
Current assets							$ 4,963
Property and equipment							459
Intangible - finite life							8,380
Goodwill							11,120
Total assets acquired							24,922
Current liabilities assumed							(714)
Deferred income tax liability							(388)
Net assets acquired							$ 23,820
Compass Water Solutions, Inc [Member]
Business Acquisition [Line Items]
Current assets						$ 4,796
Property and equipment						101
Intangible - finite life						4,900
Goodwill						4,848
Total assets acquired						14,645
Current liabilities assumed						(623)
Deferred income tax liability						(1,627)
Net assets acquired						$ 12,395
Western Air Ducts Ltd [Member]
Business Acquisition [Line Items]
Current assets					$ 2,711
Property and equipment					188
Intangible - finite life					3,158
Goodwill					7,344
Total assets acquired					13,401
Current liabilities assumed					(1,127)
Deferred income tax liability					(824)
Net assets acquired					$ 11,450
Transcend Solution [Member]
Business Acquisition [Line Items]
Current assets	2,614
Property and equipment	1,153
Goodwill	19,601
Other Assets	231
Total assets acquired	23,599
Current liabilities assumed	(1,203)
Net assets acquired	$ 22,396
DS21 Co., Ltd.
Business Acquisition [Line Items]
Current assets				$ 5,099
Property and equipment				4,112
Intangible - finite life				422
Deferred income tax asset				557
Other Assets				169
Total assets acquired				10,359
Current liabilities assumed				(1,008)
Other liabilities				(113)
Net assets acquired				$ 9,238
Malvar Engineering Limited [Member]
Business Acquisition [Line Items]
Current assets		$ 3,240
Property and equipment		635
Intangible - finite life		1,778
Goodwill		4,779
Total assets acquired		10,432
Current liabilities assumed		(4,860)
Deferred income tax liability		(444)
Net assets acquired		$ 5,128

Acquisitions and Joint Ventur_5

Acquisitions and Joint Ventures - Schedule of Estimated Fair Values of Assets Acquired and Liabilities Assumed (Parenthetical) (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Sep. 19, 2022	Jun. 22, 2022	May 03, 2022	Mar. 07, 2022
General Rubber LLC [Member]
Business Acquisition [Line Items]
Cash, Current assets					$ 137
Transcend Solution [Member]
Business Acquisition [Line Items]
Cash, Current assets	$ 52
Compass Water Solutions, Inc [Member]
Business Acquisition [Line Items]
Cash, Current assets				$ 334
Western Air Ducts Ltd [Member]
Business Acquisition [Line Items]
Cash, Current assets			$ 1,557
DS21 Co., Ltd.
Business Acquisition [Line Items]
Cash, Current assets		$ 1,453

Acquisitions and Joint Ventur_6

Acquisitions and Joint Ventures - Schedule of Unaudited Pro Forma Financial Information (Details) - General Rubber LLC [Member] - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Business Acquisition [Line Items]
Net sales	$ 116,116	$ 103,015
Net income attributable to CECO Environmental Corp.	$ 2,021	$ 2,662
Earnings (loss) per share:
Basic	$ 0.06	$ 0.08
Diluted	$ 0.06	$ 0.08

Business Segment Information -

Business Segment Information - Net Sales and Income from Operation by Business Segment (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Segment Reporting Information [Line Items]
Net sales		$ 112,563	$ 92,436
Income from operations		5,461	5,202
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Income from operations	[1]	(9,890)	(5,407)
Engineered Systems Segment [Member]
Segment Reporting Information [Line Items]
Net sales		74,454	56,975
Income from operations		9,805	6,470
Industrial Process Solutions Segment [Member]
Segment Reporting Information [Line Items]
Net sales		38,109	35,461
Income from operations		$ 5,546	$ 4,139
[1] Includes corporate compensation, professional services, information technology, and other general and administrative corporate expenses.

Business Segment Information _2

Business Segment Information - Property and Equipment Additions, Depreciation and Amortization and Identifiable Assets (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Segment Reporting Information [Line Items]
Property and equipment additions		$ 2,513	$ 665
Depreciation and amortization		2,885	2,288
Identifiable assets		567,568		$ 504,721
Engineered Systems Segment [Member]
Segment Reporting Information [Line Items]
Property and equipment additions		244	5
Depreciation and amortization		1,212	895
Identifiable assets		394,204		332,820
Industrial Process Solutions Segment [Member]
Segment Reporting Information [Line Items]
Property and equipment additions		1,399	73
Depreciation and amortization		1,158	1,050
Identifiable assets		153,647		150,458
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Property and equipment additions		870	587
Depreciation and amortization		515	$ 343
Identifiable assets	[1]	$ 19,717		$ 21,443
[1] Corporate and Other assets consist primarily of cash and income tax related assets.

Business Segment Information _3

Business Segment Information - Goodwill (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Goodwill	$ 207,788	$ 183,197	$ 161,183
Engineered Systems Segment [Member]
Segment Reporting Information [Line Items]
Goodwill	139,159	114,746
Industrial Process Solutions Segment [Member]
Segment Reporting Information [Line Items]
Goodwill	$ 68,629	$ 68,451

Business Segment Information _4

Business Segment Information - Intra-Segment and Inter-Segment Revenues (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Segment Reporting Information [Line Items]
Net sales	$ 112,563	$ 92,436
Engineered Systems Segment [Member]
Segment Reporting Information [Line Items]
Net sales	74,454	56,975
Industrial Process Solutions Segment [Member]
Segment Reporting Information [Line Items]
Net sales	38,109	35,461
Intra-Segment Sales [Member]
Segment Reporting Information [Line Items]
Net sales	(2,373)	(6,183)
Intra-Segment Sales [Member] | Engineered Systems Segment [Member]
Segment Reporting Information [Line Items]
Net sales	(1,538)	(4,558)
Intra-Segment Sales [Member] | Industrial Process Solutions Segment [Member]
Segment Reporting Information [Line Items]
Net sales	(835)	(1,625)
Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	115,131	98,742
Operating Segments [Member] | Engineered Systems Segment [Member]
Segment Reporting Information [Line Items]
Net sales	76,089	61,600
Operating Segments [Member] | Industrial Process Solutions Segment [Member]
Segment Reporting Information [Line Items]
Net sales	39,042	37,142
Inter-Segment Elimination [Member] | Industrial Inter-Segment Sales [Member]
Segment Reporting Information [Line Items]
Net sales	(97)	(67)
Inter-Segment Elimination [Member] | Energy Inter-Segment Sales [Member]
Segment Reporting Information [Line Items]
Net sales	(98)	(56)
Inter-Segment Elimination [Member] | Engineered Systems Segment [Member] | Industrial Inter-Segment Sales [Member]
Segment Reporting Information [Line Items]
Net sales	(97)	(67)
Inter-Segment Elimination [Member] | Industrial Process Solutions Segment [Member] | Energy Inter-Segment Sales [Member]
Segment Reporting Information [Line Items]
Net sales	$ (98)	$ (56)