Charah Solutions, Inc. 8.50% Se (CHRB) 10-Q 10 Nov 21 2021 Q3 Quarterly report Financial data

Cover

Cover - shares	9 Months Ended
	Sep. 30, 2021	Nov. 01, 2021
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2021
Document Transition Report	false
Entity File Number	001-38523
Entity Registrant Name	CHARAH SOLUTIONS, INC
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	82-4228671
Entity Address, Address Line One	12601 Plantside Drive
Entity Address, City or Town	Louisville
Entity Address, State or Province	KY
Entity Address, Postal Zip Code	40299
City Area Code	502
Local Phone Number	245-1353
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		33,407,806
Entity Central Index Key	0001730346
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Amendment Flag	false
Common Stock
Document Information [Line Items]
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	CHRA
Security Exchange Name	NYSE
Senior Notes
Document Information [Line Items]
Title of 12(b) Security	8.50% Senior Notes due 2026
Trading Symbol	CHRB
Security Exchange Name	NYSE

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 22,400	$ 24,787
Restricted cash	48,653	4,424
Trade accounts receivable, net	44,059	46,609
Receivable from affiliates	0	182
Contract assets	23,511	18,329
Inventory	5,558	5,917
Income tax receivable	29	260
Prepaid expenses and other current assets	7,581	5,287
Total current assets	151,791	105,795
Property and equipment, net	64,387	49,470
Goodwill	62,193	62,193
Intangible assets, net	60,701	61,426
Equity method investments	7	831
Other assets	8,444	1,245
Total assets	347,523	280,960
Current liabilities:
Accounts payable	26,104	15,613
Contract liabilities	14,145	6,295
Capital lease obligations, current portion	5,156	2,199
Notes payable, current maturities	25,533	22,308
Asset retirement obligations, current portion	32,181	2,043
Accrued liabilities	21,723	34,937
Other current liabilities	0	935
Total current liabilities	124,842	84,330
Long-term liabilities:
Deferred tax liabilities	800	368
Contingent payments for acquisitions	1,950	1,950
Asset retirement obligations	17,786	3,116
Line of credit	0	12,003
Capital lease obligations, less current portion	10,587	4,485
Notes payable, less current maturities	135,573	124,969
Other liabilities	1,845	2,000
Total liabilities	293,383	233,221
Commitments and contingencies
Mezzanine equity
Series A Preferred Stock — $0.01 par value; 50 shares authorized, 26 shares issued and outstanding as of September 30, 2021 and December 31, 2020; aggregate liquidation preference of $31,682 and $28,783 as of September 30, 2021 and December 31, 2020, respectively	33,438	27,423
Stockholders’ equity
Retained losses	(95,995)	(88,865)
Common Stock — $0.01 par value; 200,000 shares authorized, 33,408 and 30,077 shares issued and outstanding as of September 30, 2021 and December 31, 2020, respectively	334	300
Additional paid-in capital	116,088	108,471
Total stockholders’ equity	20,427	19,906
Non-controlling interest	275	410
Total equity	20,702	20,316
Total liabilities, mezzanine equity and stockholders’ equity	$ 347,523	$ 280,960

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Series A Preferred Stock, par value (in dollars per share)	$ 0.01	$ 0.01
Series A Preferred Stock, shares authorized (in shares)	50,000	50,000
Series A Preferred Stock, shares issued (in shares)	26,000	26,000
Series A Preferred Stock, shares outstanding (in shares)	26,000	26,000
Series A Preferred Stock, aggregate liquidation preference	$ 31,682	$ 28,783
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	200,000,000	200,000,000
Common stock, shares issued (in shares)	33,408,000	30,077,000
Common stock, shares outstanding (in shares)	33,408,000	30,077,000

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Revenue	$ 84,161	$ 63,116	$ 199,786	$ 166,697
Cost of sales	(74,712)	(54,782)	(177,832)	(148,262)
Gross profit	9,449	8,334	21,954	18,435
General and administrative expenses	(9,396)	(2,043)	(28,080)	(21,368)
Gain on sales-type lease	0	0	5,568	0
Gains on sales of property and equipment, net	2,998	0	6,241	0
Gain on ARO settlement	1,127	0	1,127	0
Other operating expenses from ERT services	(817)	0	(2,114)	0
Impairment expense	(700)	(6,399)	(827)	(6,399)
Operating income (loss)	2,661	(108)	3,869	(9,332)
Interest expense, net	(3,541)	(3,551)	(10,090)	(10,465)
Loss on extinguishment of debt	(638)	0	(638)	(8,603)
Income from equity method investment	0	625	191	1,247
Loss from continuing operations before income taxes	(1,518)	(3,034)	(6,668)	(27,153)
Income tax expense	203	608	432	608
Net loss from continuing operations, net of tax	(1,721)	(3,642)	(7,100)	(27,761)
Income from discontinued operations, net of tax	0	119	0	6,939
Net loss	(1,721)	(3,523)	(7,100)	(20,822)
Less (loss) income attributable to non-controlling interest	(44)	693	30	1,180
Net loss attributable to Charah Solutions, Inc.	(1,677)	(4,216)	(7,130)	(22,002)
Amounts attributable to Charah Solutions, Inc.
Loss from continuing operations, net of tax and non-controlling interest	(1,677)	(4,335)	(7,130)	(28,941)
Deemed and imputed dividends on Series A Preferred Stock	(148)	(147)	(443)	(314)
Series A Preferred Stock dividends	(1,946)	(877)	(6,161)	(1,846)
Net loss from continuing operations attributable to common stockholders	(3,771)	(5,359)	(13,734)	(31,101)
Income from discontinued operations, net of tax	0	119	0	6,939
Net loss attributable to common stockholders	$ (3,771)	$ (5,240)	$ (13,734)	$ (24,162)
Net loss from continuing operations per common share:
Basic (in dollars per share)	$ (0.12)	$ (0.18)	$ (0.44)	$ (1.04)
Diluted (in dollars per share)	(0.12)	(0.18)	(0.44)	(1.04)
Net income from discontinued operations per common share:
Basic (in dollars per share)	0	0.01	0	0.23
Diluted (in dollars per share)	0	0.01	0	0.23
Net loss attributable to common stockholders per common share:
Basic (in dollars per share)	(0.12)	(0.17)	(0.44)	(0.81)
Diluted (in dollars per share)	$ (0.12)	$ (0.17)	$ (0.44)	$ (0.81)
Weighted-average shares outstanding used in income (loss) per common share:
Basic (in shares)	32,277	29,986	30,955	29,853
Diluted (in shares)	32,277	29,986	30,955	29,853

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Total	Common Stock	Additional Paid-In Capital	Retained Losses	Non-Controlling Interest
Beginning balance (in shares) at Dec. 31, 2019	0
Beginning balance at Dec. 31, 2019	$ 0
Mezzanine Equity
Issuance of Series A Preferred Stock, net of issuance costs (in shares)	26,000
Issuance of Series A Preferred Stock, net of issuance costs	$ 24,253
Deemed and imputed dividends on Series A Preferred Stock	$ 1,283
Ending balance (in shares) at Sep. 30, 2020	26,000
Ending balance at Sep. 30, 2020	$ 25,536
Balance beginning of period (in shares) at Dec. 31, 2019			29,622,835
Balance beginning of period at Dec. 31, 2019	53,273	$ 52,481	$ 296	$ 85,187	$ (33,002)	$ 792
Permanent Equity
Net (loss) income	(20,822)	(22,002)			(22,002)	1,180
Issuance of common stock	0
Distributions	(1,036)					(1,036)
Share-based compensation expense	2,084	2,084		2,084
Shares issued under share-based compensation plans (in shares)			426,852
Shares issued under share-based compensation plans	0		$ 4	(4)
Taxes paid related to net settlement of shares (in shares)			(63,924)
Taxes paid related to net settlement of shares	(137)	(137)		(137)
Deemed and imputed dividends on Series A Preferred Stock	(314)	(314)		(314)
Series A Preferred Stock dividends	(1,846)	(1,846)		(1,846)
Balance end of period (in shares) at Sep. 30, 2020			29,985,763
Balance end of period at Sep. 30, 2020	$ 31,202	30,266	$ 300	84,970	(55,004)	936
Beginning balance (in shares) at Jun. 30, 2020	26,000
Beginning balance at Jun. 30, 2020	$ 24,549
Mezzanine Equity
Issuance of Series A Preferred Stock, net of issuance costs	(10)
Deemed and imputed dividends on Series A Preferred Stock	$ 997
Ending balance (in shares) at Sep. 30, 2020	26,000
Ending balance at Sep. 30, 2020	$ 25,536
Balance beginning of period (in shares) at Jun. 30, 2020			29,985,763
Balance beginning of period at Jun. 30, 2020	35,462	34,892	$ 300	85,380	(50,788)	570
Permanent Equity
Net (loss) income	(3,523)	(4,216)			(4,216)	693
Issuance of common stock	0
Distributions	(327)					(327)
Share-based compensation expense	614	614		614
Shares issued under share-based compensation plans	0
Taxes paid related to net settlement of shares	0
Deemed and imputed dividends on Series A Preferred Stock	(147)	(147)		(147)
Series A Preferred Stock dividends	(877)	(877)		(877)
Balance end of period (in shares) at Sep. 30, 2020			29,985,763
Balance end of period at Sep. 30, 2020	$ 31,202	30,266	$ 300	84,970	(55,004)	936
Beginning balance (in shares) at Dec. 31, 2020	26,000
Beginning balance at Dec. 31, 2020	$ 27,423
Mezzanine Equity
Deemed and imputed dividends on Series A Preferred Stock	443
Series A Preferred Stock dividends	$ 5,572
Ending balance (in shares) at Sep. 30, 2021	26,000
Ending balance at Sep. 30, 2021	$ 33,438
Balance beginning of period (in shares) at Dec. 31, 2020	30,077,000		30,077,018
Balance beginning of period at Dec. 31, 2020	$ 20,316	19,906	$ 300	108,471	(88,865)	410
Permanent Equity
Net (loss) income	(7,100)	(7,130)			(7,130)	30
Issuance of common stock (in shares)			2,888,889
Issuance of common stock	13,000	13,000	$ 29	12,971
Distributions	(165)					(165)
Share-based compensation expense	1,767	1,767		1,767
Shares issued under share-based compensation plans (in shares)			535,417
Shares issued under share-based compensation plans	0		$ 6	(6)
Taxes paid related to net settlement of shares (in shares)			(93,518)
Taxes paid related to net settlement of shares	(512)	(512)	$ (1)	(511)
Deemed and imputed dividends on Series A Preferred Stock	(443)	(443)		(443)
Series A Preferred Stock dividends	$ (6,161)	(6,161)		(6,161)
Balance end of period (in shares) at Sep. 30, 2021	33,408,000		33,407,806
Balance end of period at Sep. 30, 2021	$ 20,702	20,427	$ 334	116,088	(95,995)	275
Beginning balance (in shares) at Jun. 30, 2021	26,000
Beginning balance at Jun. 30, 2021	$ 31,141
Mezzanine Equity
Deemed and imputed dividends on Series A Preferred Stock	148
Series A Preferred Stock dividends	$ 2,149
Ending balance (in shares) at Sep. 30, 2021	26,000
Ending balance at Sep. 30, 2021	$ 33,438
Balance beginning of period (in shares) at Jun. 30, 2021			30,518,917
Balance beginning of period at Jun. 30, 2021	10,748	10,429	$ 305	104,442	(94,318)	319
Permanent Equity
Net (loss) income	(1,721)	(1,677)			(1,677)	(44)
Issuance of common stock (in shares)			2,888,889
Issuance of common stock	13,000	13,000	$ 29	12,971
Distributions	0
Share-based compensation expense	769	769		769
Shares issued under share-based compensation plans	0
Taxes paid related to net settlement of shares	0
Deemed and imputed dividends on Series A Preferred Stock	(148)	(148)		(148)
Series A Preferred Stock dividends	$ (1,946)	(1,946)		(1,946)
Balance end of period (in shares) at Sep. 30, 2021	33,408,000		33,407,806
Balance end of period at Sep. 30, 2021	$ 20,702	$ 20,427	$ 334	$ 116,088	$ (95,995)	$ 275

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities:
Net loss	$ (7,100)	$ (20,822)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	18,578	13,196
Loss on extinguishment of debt	638	8,603
Paid-in-kind interest on long-term debt	2,844	3,093
Impairment expense	827	6,399
Amortization of debt issuance costs	590	396
Deferred income taxes	432	608
Gain on sales-type lease	(5,568)	0
(Gains) losses on sales of property and equipment	(7,638)	581
Income from equity method investment	(191)	(1,247)
Distributions received from equity method investment	0	1,230
Non-cash shared-based compensation	1,767	2,084
Gain on interest rate swap	(190)	(95)
Interest rate swap settlement	(745)	0
Gain on ARO settlement	(1,127)	0
Interest accreted on contingent payments for acquisition	0	143
Increase (decrease) in cash due to changes in:
Trade accounts receivable	5,288	(15,852)
Contract assets and liabilities	2,667	14,904
Inventory	(147)	5,477
Accounts payable	9,471	(3,740)
Asset retirement obligation	(4,654)	(7,905)
Other assets and liabilities	(13,714)	3,846
Net cash provided by operating activities	2,028	10,899
Cash flows from investing activities:
Proceeds from the sales of property and equipment	10,114	698
Purchases of property and equipment	(7,024)	(3,556)
Cash and restricted cash received from ERT transaction	34,900	0
Payments of working capital adjustment and other items for the sale of subsidiary	(7,367)	0
Distributions received from equity method investment	1,015	0
Net cash provided by (used in) investing activities	31,638	(2,858)
Cash flows from financing activities:
Net (payments) proceeds on the line of credit	(12,003)	6,667
Proceeds from long-term debt	156,301	18,353
Principal payments on long-term debt	(134,613)	(21,479)
Payments of debt issuance costs	(10,912)	(1,623)
Principal payments on capital lease obligations	(2,920)	0
Taxes paid related to net settlement of shares	(512)	(137)
Net proceeds from issuance of convertible Series A Preferred Stock	0	24,253
Proceeds from issuance of common stock	13,000	0
Distributions to non-controlling interest	(165)	(1,036)
Net cash provided by financing activities	8,176	24,998
Net increase in cash, cash equivalents and restricted cash	41,842	33,039
Cash, cash equivalents and restricted cash, beginning of period	29,211	6,128
Cash, cash equivalents and restricted cash, end of period	71,053	39,167
Supplemental disclosures of cash flow information:
Cash paid during the period for interest	5,386	10,349
Cash paid during the period for taxes	831	779
Supplemental disclosures and non-cash investing and financing transactions:
Gross proceeds from the line of credit	73,817	90,326
Gross payments on the line of credit	(85,820)	(83,659)
Sale of structural fill asset through a sales-type lease	6,000	0
Proceeds from the sale of equipment in accounts receivable, net	1,252	0
Series A Preferred Stock dividends payable included in accrued expenses	1,946	877
Deemed and imputed dividends on Series A Preferred Stock	443	0
Equipment acquired through capital leases	11,980	0
Changes in property and equipment included in accounts payables and accrued expenses	205	676
Sale of equipment through the issuance of a note receivable	0	1,450
Debt issuance costs included in accounts payable and accrued expenses	1,019	0
Cash and cash equivalents	22,400	30,006
Restricted cash	48,653	9,161
Total cash and cash equivalents	$ 71,053	$ 39,167

Nature of Business and Basis of

Nature of Business and Basis of Presentation	9 Months Ended
	Sep. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Business and Basis of Presentation	Nature of Business and Basis of Presentation Organization Charah Solutions, Inc. and subsidiaries (“Charah Solutions,” the “Company,” “we,” “us,” or “our”) was formed as a Delaware corporation in January 2018 and did not conduct any material business operations before the transactions described below other than certain activities related to its initial public offering, which was completed on June 18, 2018 (the “IPO”). Charah Solutions is a holding company, the sole material assets of which consist of membership interests in Charah Management LLC, a Delaware limited liability company (“Charah Management”). Through the Company’s ownership of Charah Management, the Company owns the outstanding equity interests in Charah, LLC, a Kentucky limited liability company (“Charah”), the subsidiary through which Charah Solutions operates its businesses. Description of Business Operations The Company is a leading national service provider of mission-critical environmental services and byproduct sales to the power generation industry, enabling our customers to address challenges related to the remediation of coal ash ponds and landfills at open and closed power plant sites while continuously operating and providing necessary electric power to communities nationwide. Services offered include a suite of remediation and compliance services, byproduct sales and marketing, fossil services and environmental risk transfer (“ERT”) services. The Company has corporate offices in Kentucky and North Carolina and principally operates in the eastern and mid-central United States. Under the Jumpstart Our Business Startups Act (the “JOBS Act”), the Company meets the definition of an “emerging growth company,” which allows the Company to have an extended transition period for complying with new or revised accounting standards pursuant to Section 107(b) of the JOBS Act. The Company intends to take advantage of all of the reduced reporting requirements and exemptions, including the longer phase-in periods for the adoption of new or revised financial accounting standards under Section 107 of the JOBS Act until the Company is no longer an emerging growth company. Among other things, we are not required to provide an auditor attestation report on the assessment of the internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act of 2002 and our disclosure obligations regarding executive compensation may be reduced. We may take advantage of these provisions until the last day of our fiscal year following the fifth anniversary of the IPO or December 31, 2023. However, if certain events occur before the end of such five-year period, including if we become a “large accelerated filer,” our annual gross revenue exceeds $1.07 billion, or we issue more than $1.0 billion of non-convertible debt in any three-year period, we will cease to be an emerging growth company before the end of such five-year period. Basis for Presentation The Company’s fiscal year ends December 31. The accompanying unaudited condensed consolidated financial statements include the assets, liabilities, stockholders’ equity and results of operations of the Company and its consolidated subsidiaries. Intercompany transactions and balances have been eliminated in consolidation. The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with rules and regulations of the Securities and Exchange Commission for quarterly reports on Form 10-Q. In the opinion of management, all adjustments considered necessary for a fair presentation have been included, which consist of normal recurring adjustments. Certain information and footnote disclosures normally included in the annual financial statements prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) have been condensed or omitted. The accompanying unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated and combined financial statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2020. Going Concern As of June 30, 2021, borrowings under the Company’s Credit Facility (as defined in Note 11) totaled $132,788 and were scheduled to mature in July 2022. However, as of June 30, 2021, the Company did not have sufficient cash on hand or available liquidity to repay the credit facility upon maturity. As discussed in Note 11 and Note 14, during the quarter ended September 30, 2021, the Company fully repaid and terminated the Credit Facility set to mature on July 31, 2022 using the proceeds before payment of expenses and other fees of $135,000 from the Company's 8.50% Senior Notes maturing August 31, 2026 (the "Notes") and proceeds of $13,000 from issuance of the Company's common stock. As a result of the debt refinancing and equity proceeds, there is no longer substantial doubt about the Company’s ability to continue as a going concern. The accompanying unaudited condensed consolidated financial statements are prepared in accordance with generally accepted accounting principles applicable to a going concern, which contemplates the realization of assets and the satisfaction of liabilities in the normal course of business. Discontinued Operations On November 19, 2020, the Company sold its Allied Power Holdings LLC (“Allied”) subsidiary engaged in maintenance, modification and repair services to the nuclear and fossil power generation industry to an affiliate of Bernhard Capital Partners Management, LP (“BCP”), the Company’s majority shareholder, in an all-cash deal for $40,000 (the “Allied Transaction”), subject to adjustments for working capital and certain other adjustments as set forth in the purchase agreement (the “Purchase Agreement”). Discontinued operations comprise those activities that were disposed of during 2020 and represent a separate major line of business that can be clearly distinguished for operational and financial reporting purposes. Accordingly, the accompanying unaudited condensed consolidated statements of operations and the notes to condensed consolidated financial statements reflect the Allied results as discontinued operations for all 2020 periods presented. Unless otherwise specified, disclosures in these condensed consolidated financial statements reflect continuing operations only. The accompanying unaudited condensed consolidated statements of cash flows for the nine months ended September 30, 2021 include both continuing and discontinued operations. Refer to Note 4, Discontinued Operations, for further information on the discontinued operations relating to the Allied Transaction. Segment Information The Company had two reporting units, two operating segments and two reportable segments in 2019 and in 2020 through the date of the Allied Transaction, Environmental Solutions (“ES”) and Maintenance and Technical Services (“M&TS”). The Company determined that it had two reporting units because of the way the reporting units were managed. After the Allied Transaction, the Company realigned our segment reporting into a single operating segment to reflect the suite of end-to-end services we offer our utility partners and how our Chief Operating Decision Maker (“CODM”) reviews consolidated financial information to evaluate results of operations, assess performance and allocate resources. Due to the nature of the Company’s business, the Company's Chief Executive Officer, who is also the CODM, evaluates the performance of the Company and allocates resources of the Company based on consolidated gross profit, general and administrative expenses, balance sheet, liquidity, capital spending, safety statistics and business development reports for the Company as a whole. Since the Company has a single operating segment, all required financial segment information can be found in the consolidated financial statements. The prior period results in the accompanying unaudited condensed consolidated statements of operations were reclassified to conform to this presentation. We provide the following services through our one segment: remediation and compliance services, byproduct sales, fossil services and ERT services. Remediation and compliance services are associated with our customers’ need for multi-year environmental improvement and sustainability initiatives, whether driven by regulatory requirements, power generation customer initiatives or consumer expectations and standards. Byproduct sales support both our power generation customers’ desire to recycle their recurring and legacy volumes of coal combustion residuals (“CCRs”), commonly known as coal ash, and our ultimate end customers’ need for high-quality, cost-effective raw material substitutes. Fossil services consist of recurring and mission-critical coal ash management and operations for coal-fired power generation facilities. ERT services represent an innovative solution designed to meet the evolving and increasingly complex needs of utility customers. These customers need to retire and decommission older or underutilized assets while maximizing the asset's value and improving the environment. Our ERT services manage the sites' environmental remediation requirements, which benefits the communities and lowers the utility customers' cost. Seasonality of Business Based on historical trends, we expect our operating results to vary seasonally. Variations in normal weather patterns can cause changes in energy consumption, which may influence the demand and timing of associated services for our fossil services offerings. Inclement weather can impact construction-related activities associated with pond and landfill remediation, which affects the timing of revenue generation for our remediation and compliance services. Inclement weather can also impact decommissioning and demolition, land redevelopment and scrap sales activities, which affects the timing of income generation for our ERT services. Our byproduct sales are also negatively affected during winter months when the use of cement and cement products is generally lower. Business Combinations On March 30, 2018, Charah Management completed a transaction with SCB Materials International, Inc. and affiliated entities (“SCB”), a previously unrelated third party, pursuant to which Charah Solutions acquired certain assets and liabilities of SCB for a purchase price of $35,000, with $20,000 paid at closing and $15,000 to be paid over time in conjunction with certain performance metrics. The contract also contained various mechanisms for a working capital true-up. The acquisition was accounted for under the acquisition method of accounting in accordance with ASC Topic 805, Business Combinations with the allocation of the purchase price for the acquisition finalized as of March 31, 2019. The recognized goodwill from the transaction was allocated to the Environmental Solutions segment. In November 2018, the $15,000 contingent consideration to be paid over time was reduced by $3,300. During the year ended December 31, 2020, the Company evaluated the recoverability of certain grinding technology assets. As part of that review, we assessed the likelihood of paying the contingent liability based on achieving certain performance sales levels using these technology assets. In the fourth quarter of 2020, the Company concluded that certain sales levels would not be achieved, and we reduced the corresponding liability by $9,702, which was recognized as a component of operating income in the consolidated statements of operations. As of September 30, 2021, we do not expect the remaining liability balance of $1,950 to be paid within the next 12 months. The fair value of the contingent consideration was estimated using unobservable inputs of future cash flows, which we consider to be Level 3 measurements. Fair Value Disclosure The Company did not have any recurring or non-recurring level 3 fair value measurements as of September 30, 2021 and 2020 other than the value of certain remaining grinding technology related equipment upon impairment as described in Note 7, Balance Sheet Items , the measurement of the preferred stock paid-in-kind dividends as described in Note 13, Mezzanine Equity, and the application of stock-based compensation accounting as described in Note 17, Stock/Unit-Based Compensation . There have been no transfers between levels of the fair value hierarchy during the three and nine months ended September 30, 2021.

Impact of the COVID-19 Pandemic

Impact of the COVID-19 Pandemic	9 Months Ended
	Sep. 30, 2021
Unusual or Infrequent Items, or Both [Abstract]
Impact of the COVID-19 Pandemic	Impact of the COVID-19 Pandemic In March 2020, the World Health Organization categorized the disease caused by a novel coronavirus (“COVID-19”) as a pandemic, and the President of the United States declared the COVID-19 pandemic to be a national emergency. The Company is a mission-critical contractor to the power generation industry, which has been identified as part of the Department of Homeland Security’s Critical Infrastructure Sector. On March 27, 2020, the U.S. government enacted the Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”), which includes modifications to the limitation on business interest expense and net operating loss carryforward provisions and provided a payment delay of certain employer payroll taxes during 2020. The Company deferred $1,637 of employer payroll taxes otherwise due in 2020, with 50% due by December 31, 2021 and the remaining 50% due by December 31, 2022.

Recent Accounting Pronouncement

Recent Accounting Pronouncements	9 Months Ended
	Sep. 30, 2021
Accounting Changes and Error Corrections [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements Recently Adopted Accounting Pronouncements In August 2020, the FASB issued ASU No. 2020-06, Debt – Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging – Contracts in Entity’s Own Equity (Subtopic 815 – 40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity . This ASU simplifies the guidance on accounting for convertible debt instruments by removing the separation models for convertible debt with a cash conversion feature and convertible debt with a beneficial conversion feature. As a result, after adopting the ASU’s guidance, entities will not separately present in equity an embedded conversion feature in such debt. Instead, they will account for a convertible debt instrument wholly as debt and convertible preferred stock wholly as preferred stock unless certain other conditions are met. Also, the ASU requires the application of the if-converted method for calculating diluted earnings per share, and the treasury stock method will no longer be available. The Company early adopted ASU No. 2020-06, as permitted by the standard, as of January 1, 2021 with no significant impact on its consolidated financial statements. Recently Issued Accounting Pronouncements In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) , requiring all leases to be recognized on the balance sheet as a right-of-use asset and a lease liability, unless the lease is a short term lease (generally a lease with a term of 12 months or less). At the commencement date of the lease, the Company will recognize: (i) a lease liability for the Company’s obligation to make payments under the lease agreement, measured on a discounted basis; and (ii) a right-of-use asset that represents the Company’s right to use, or control the use of, the specified asset for the lease term. This ASU originally required recognition and measurement of leases at the beginning of the earliest period presented using a modified retrospective transition method. In July 2018, the FASB issued ASU No. 2018-11, which provided an additional (and optional) transition method that permits application of this ASU at the adoption date with recognition of a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. In June 2020, the FASB issued ASU No. 2020-05 and delayed the effective date of this ASU, extending the effective date for non-public business entities, and making the ASU effective for the Company for the fiscal year ending December 31, 2022, and interim periods within the fiscal year ending December 31, 2023, with early adoption permitted. The Company has not yet selected a transition method and is currently evaluating the effect that the adoption of this ASU will have on its consolidated financial statements. In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326) - Measurement of Credit Losses on Financial Instruments , which introduces a new model for recognizing credit losses on financial instruments based on an estimate of current expected credit losses. The new model will apply to: (1) loans, accounts receivable, trade receivables, and other financial assets measured at amortized cost, (2) loan commitments and certain other off-balance sheet credit exposures, (3) debt securities and other financial assets measured at fair value through other comprehensive income, and (4) beneficial interests in securitized financial assets. The amendments contained in this ASU will be applied through a modified retrospective approach through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is adopted. In November 2018, the FASB issued ASU No. 2018-19, which amended the effective date of ASU No. 2016-13 and clarified that receivables arising from operating leases are not within the scope of Subtopic 326-20. In October 2019, the FASB delayed the effective date of this ASU, extending the effective date for non-public business entities and making the ASU effective for the Company for the fiscal year ending December 31, 2023, and interim periods therein, with early adoption permitted. The Company is currently evaluating the effect that the adoption of this ASU will have on its consolidated financial statements. In March 2020, the FASB issued ASU No. 2020-04, Reference Rate Reform (Topic 848) Facilitation of the Effects of Reference Rate Reform on Financial Reporting . The ASU provides optional expedients and exceptions for applying GAAP to contract modifications and hedging relationships, subject to meeting certain criteria, that reference the London Inter-bank Offered Rate (“LIBOR”) or another rate that is expected to be discontinued. In January 2021, the FASB issued ASU No. 2021-01, Reference Rate Reform (Topic 848). This ASU provides supplemental guidance and clarification to ASU No. 2020-04, and these updates must be adopted concurrently, cumulatively referred to as “Topic 848.” The amendments in Topic 848 are currently effective for all entities, and upon adoption, may be applied prospectively to contract modifications made on or before December 31, 2022. The Company is still assessing the impact of Topic 848 on its consolidated financial statements.

Discontinued Operations

Discontinued Operations	9 Months Ended
	Sep. 30, 2021
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations	Discontinued Operations On November 19, 2020, the Company completed the Allied Transaction through an all-cash deal for $40,000, subject to adjustments for working capital and certain other adjustments as set forth in the Purchase Agreement, which are described below. The Allied Transaction was approved by a special committee of the Company’s board of directors consisting solely of independent directors, which obtained a fairness opinion in connection with the Allied Transaction. The Allied Transaction has been treated as a sale to an entity under common control, with $25,506 recognized as a contribution to equity during 2020. The parties made customary representations and warranties and have agreed to customary covenants in the Purchase Agreement. The Company entered into a non-competition and non-solicitation arrangement under the Purchase Agreement with the Purchaser, subject to customary exceptions. In addition, the parties also entered into a Transition Services Agreement pursuant to which the Company provided Allied and the Purchaser with certain transition assistance services from the date of the Allied Transaction until April 30, 2021 in exchange for payment. The Transition Services Agreement was subsequently amended and extended with certain transition assistance services to be provided until August 30, 2021. The Company recognized $0 and $60 resulting from the Transition Services Agreement as a credit within cost of sales in our accompanying unaudited condensed consolidated statements of operations during the three and nine months ended September 30, 2021, respectively. The Company had receivables outstanding from Allied of $23 and $120 at September 30, 2021 and December 31, 2020, respectively. In accordance with applicable accounting guidance for the disposal of long-lived assets, the results of the Allied Transaction are presented as discontinued operations and, as such, have been excluded from continuing operations for all periods presented. The Company received cash proceeds of $37,860, which was net of transaction costs of $1,900 and Allied restricted cash of $240. The Company retained Allied liabilities of $3,500, recorded a $301 increase to paid-in-capital for the income tax impact related to the Allied Transaction and recognized accruals of $6,954 for working capital adjustments and $413 for other acquisition-related charges in accrued expenses in our Consolidated Balance Sheet as of December 31, 2020, to be paid in 2021. The Company paid the working capital settlement of $6,954 to the Purchaser as well as $3,500 of retained Allied liabilities and $413 of acquisition-related charges during the nine months ended September 30, 2021. The following amounts related to discontinued operation were derived from historical financial information and have been segregated from continuing operations and reported as discontinued operations in our accompanying unaudited condensed consolidated statements of operations: Three Months Ended Nine Months Ended September 30, 2020 September 30, 2020 Revenue $ 55,599 $ 249,794 Cost of sales (51,890) (234,655) Gross profit 3,709 15,139 General and administrative expenses (2,810) (5,878) Operating income 899 9,261 Interest expense, net (a) (780) (2,322) Income from discontinued operations before income taxes 119 6,939 Income tax expense — — Income from discontinued operations $ 119 $ 6,939 (a) Interest expense was allocated to discontinued operations due to the requirement in Amendment No. 4 to Credit Agreement that cash generated from the Allied Transaction was required to be used to reduce our debt balances. The following table provides supplemental cash, cash equivalent and restricted cash information related to discontinued operations: As of September 30, 2020 Cash and cash equivalents: Cash, cash equivalents and restricted cash - continuing operations $ 38,834 Cash, cash equivalents and restricted cash - discontinued operations 333 Total cash and cash equivalents $ 39,167 The depreciation and amortization, capital expenditures and significant operating noncash items of Allied were as follows: Nine Months Ended September 30, 2020 Cash flows from discontinued operating activities: Depreciation and amortization $ 633 Loss on disposal of property and equipment 45 Non-cash shared-based compensation 283 Cash flows from discontinued investing activities: Purchase of property and equipment $ 95

Asset Acquisition

Asset Acquisition	9 Months Ended
	Sep. 30, 2021
Business Combination and Asset Acquisition [Abstract]
Asset Acquisition	Asset Acquisition As part of our ERT service offerings, in February 2021, the Company, through its wholly-owned special purpose vehicle subsidiary Gibbons Creek Environmental Redevelopment Group (“GCERG”), closed on an Asset Purchase Agreement (the “APA” or the “Agreement”) with Texas Municipal Power Agency to acquire, remediate and redevelop the Gibbons Creek Steam Electric Station and Reservoir (the “Gibbons Creek Transaction”). As part of this Agreement, GCERG took ownership of the 6,166 acre area (collectively, the “Purchased Assets”), which includes the closed power station and adjacent property, the 3,500 acre reservoir, dam and floodway. GCERG assumed all environmental responsibilities and became responsible for the decommissioning of the coal power plant as well as performing all environmental remediation work for the site landfills and ash ponds. At closing of the APA, GCERG became liable for and expressly fully assumed any and all environmental liabilities and environmental compliance, as well as, without limitation, any remediation, investigation, management, mitigation, closure, maintenance, reporting, removal, disposal of and any other actions with respect to any hazardous substances at, on, in, under, or emanating from the Purchased Assets. GCERG, at its discretion, plans to redevelop the property in an environmentally conscious manner that will expand economic activity and benefit the surrounding communities as well as restore the property to a state that will enable it to be put to its best potential use. The existing power plant is being demolished, and GCERG is working with the Texas Commission on Environmental Quality to complete all environmental remediation required for the property and then plans to redevelop the remediated property within all zoning restrictions. The redevelopment of the property is expected to be completed within 34 months from the date of acquisition. The Gibbons Creek Transaction was accounted for as an asset acquisition in accordance with ASC 805, Business Combinations, with the assumed liabilities net of cash received or owed to us by the seller comprising the purchase price. Since the fair value of the net assets acquired exceeded the cost, the Company allocated the difference pro rata on the basis of relative fair values to reduce land, property and equipment, and intangible assets acquired. The assets acquired and liabilities assumed as recognized within the Company's condensed consolidated balance sheet upon closing on the APA consisted of the following: Consideration and direct transaction costs: Asset retirement obligations $ (50,590) Bond and insurance accrued expenses, net (2,229) Direct transaction costs (2,336) Total consideration and transaction costs incurred $ (55,155) Asset Received: Cash $ 6,354 Restricted cash 28,546 Water rights 5,196 Land 14,385 Plant, machinery and equipment 610 Vehicles 64 Total allocated value of assets acquired $ 55,155 The Company has identified asset retirement obligations within the assumed liabilities to be initially measured and valued in accordance with ASC 410, Asset Retirement and Environmental Obligations . We developed our estimates of these obligations using input from our operations personnel. Our estimates are based on our interpretation of current requirements and proposed regulatory changes and are intended to approximate fair value. Absent quoted market prices, the estimate of fair value is based on the best available information, including the results of present value techniques. We use professional engineering judgment and estimated prices paid for similar work to determine the fair value of these obligations. We are required to recognize these obligations at market prices whether we plan to contract with third parties or perform the work ourselves. Once we determined the estimated closure and post-closure costs for each asset retirement obligation, we inflation-adjusted those costs to the expected time of payment and discounted those expected future costs back to present value using an inflation rate of 3.0%. We discounted these costs to present value using the credit-adjusted, risk-free rate effective at the time the obligation was incurred, consistent with the expected cash flow approach. Any changes in expectations that result in an upward revision to the estimated cash flows are treated as a new liability and discounted at the current rate, while downward revisions are discounted at the historical weighted average rate of the recorded obligation. The credit-adjusted, risk-free discount rate used to calculate the present value of an obligation is specific to each individual asset retirement obligation. The weighted average rate applicable to our long-term asset retirement obligations related to the Gibbons Creek Transaction was approximately 4.5% at the acquisition date. Because these obligations are measured at estimated fair value using present value techniques, changes in the estimated cost or timing of future final capping, closure, and post-closure activities could result in a material change in these liabilities, related assets, and results of operations. We assess the appropriateness of the estimates used to develop our recorded balances annually, or more often if conditions warrant. Changes in inflation rates or the estimated costs, timing, or extent of future final closure and post-closure activities typically result in a current adjustment to the recorded liability and land asset. Demolition costs will be capitalized as part of the land as incurred as part of preparing the site for sale, since, at the acquisition date, (i) we planned to demolish the existing structure as part of the redevelopment plan for the acquired property, (ii) demolition is expected to occur within a reasonable period of time after acquisition, and (iii) such expected costs will be incurred to make the land saleable to a third party. As part of the acquisition, the Company acquired certain plant, machinery and equipment and vehicles for which management committed to a plan to sell. Property and equipment of $193 that was initially classified as held for sale was subsequently sold to third parties during the nine months ended September 30, 2021.

Revenue

Revenue	9 Months Ended
	Sep. 30, 2021
Revenue from Contract with Customer [Abstract]
Revenue	Revenue We disaggregate our revenue from customers by type of service and by geographic region as we believe it best depicts how the nature, amount, timing and uncertainty of our revenue and cash flows are affected by economic factors. See details in the tables below. Three Months Ended Nine Months Ended September 30, September 30, 2021 2020 2021 2020 Byproduct sales $ 22,368 $ 22,940 $ 56,910 $ 66,101 Construction contracts 48,176 21,590 99,828 51,784 Services 13,617 18,586 43,048 48,812 Total revenue $ 84,161 $ 63,116 $ 199,786 $ 166,697 Three Months Ended Nine Months Ended September 30, September 30, 2021 2020 2021 2020 United States $ 84,161 $ 63,045 $ 199,786 $ 165,780 Foreign — 71 — 917 Total revenue $ 84,161 $ 63,116 $ 199,786 $ 166,697 As of September 30, 2021, the Company had remaining performance obligations with an aggregate transaction price of $491,066 on construction contracts for which we recognize revenue over time. We expect to recognize approximately 13% of our remaining performance obligations as revenue during the remainder of 2021, 15% in 2022, 10% in 2023, and 62% thereafter. Revenue associated with our remaining performance obligations includes performance obligations related to our construction contracts. The balance of remaining performance obligations does not include variable consideration that was determined to be constrained as of September 30, 2021. As of September 30, 2021, there were $4,837 of unapproved change orders associated with project scope changes included in determining the profit or loss on certain construction contracts, of which $1,732 were approved subsequent to quarter-end. The timing of revenue recognition, billings and cash collections results in accounts receivable, contract assets, and contract liabilities on the accompanying unaudited condensed consolidated balance sheets. Our contract assets are as follows: September 30, 2021 December 31, 2020 Costs and estimated earnings in excess of billings $ 15,395 $ 12,196 Retainage 8,116 6,133 Total contract assets $ 23,511 $ 18,329 Our contract liabilities are as follows: September 30, 2021 December 31, 2020 Billings in excess of costs and estimated earnings $ 12,447 $ 6,167 Deferred revenue 1,698 128 Total contract liabilities $ 14,145 $ 6,295 We recognized revenue of $0 and $6,295 for the three and nine months ended September 30, 2021, respectively, that was previously included in contract liabilities at December 31, 2020. The increase in contract liabilities was primarily due to an increase in billings in excess of costs and estimated earnings associated with billings during the three and nine months ended September 30, 2021 for a specific remediation and compliance project. The Company's net position on uncompleted contracts is as follows: September 30, 2021 December 31, 2020 Costs incurred on uncompleted contracts $ 169,576 $ 123,339 Estimated earnings 19,019 18,425 Total costs and estimated earnings 188,595 141,764 Less billings to date (185,647) (135,735) Net balance in process $ 2,948 $ 6,029 The net balance in process classified on the accompanying unaudited condensed consolidated balance sheets is as follows: September 30, 2021 December 31, 2020 Costs and estimated earnings in excess of billings $ 15,395 $ 12,196 Billings in excess of costs and estimated earnings (12,447) (6,167) Net balance in process $ 2,948 $ 6,029 Anticipated losses on long-term contracts are recognized when such losses become evident. As of September 30, 2021 and December 31, 2020, accruals for anticipated losses on long-term contracts were $143 and $155, respectively.

Balance Sheet Items

Balance Sheet Items	9 Months Ended
	Sep. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Balance Sheet Items	Balance Sheet Items Allowance for doubtful accounts The following table presents the changes in the allowance for doubtful accounts: Three Months Ended Nine Months Ended September 30, September 30, 2021 2020 2021 2020 Balance, beginning of period $ 558 $ 249 $ 467 $ 146 Add: provision — 5 139 124 Less: deduction and other adjustments (53) (2) (101) (18) Balance, end of period $ 505 $ 252 $ 505 $ 252 Property and equipment, net The following table shows the components of property and equipment, net: September 30, 2021 December 31, 2020 Plant, machinery and equipment $ 64,612 $ 68,308 Structural fill site improvements 55,760 55,760 Vehicles 11,863 12,824 Office equipment 600 582 Buildings and leasehold improvements 267 262 Land, land improvements and structural fill sites 15,439 432 Capital lease assets 18,644 6,627 Construction in progress 764 1,961 Total property and equipment $ 167,949 $ 146,756 Less: accumulated depreciation (103,562) (97,286) Property and equipment, net $ 64,387 $ 49,470 Land, land improvements and structural fill sites includes $5,158 of real property acquired in the Gibbons Creek Transaction that the Company is actively demolishing and for which depreciation expense is not being recorded. During the three and nine months ended September 30, 2021, the Company capitalized $1,365 and $2,395, respectively, of demolition costs and sold scrap with a cost basis of $1,003 and $1,342, respectively. Depreciation expense was $4,289 and $4,594 for the three months ended September 30, 2021 and 2020, respectively, and $12,657 and $13,306 for the nine months ended September 30, 2021 and 2020, respectively. Impairment of Long-Lived Assets Other than Goodwill Long-lived assets other than goodwill and indefinite-lived intangible assets, held and used by the Company, including property and equipment and long-lived intangible assets, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of the assets may not be recoverable. The Company evaluates recoverability of assets to be held and used by comparing the carrying amount of an asset to the future net undiscounted cash flows expected to be generated by the asset to determine if the carrying value is not recoverable. If the carrying value is not recoverable, the Company fair values the asset and compares that fair value to the carrying value. If the asset is considered to be impaired, the impairment loss is measured as the amount by which the carrying amount of the asset exceeds its fair value. During the three months ended September 30, 2021, the Company determined that a triggering event occurred that indicated that the carrying value of certain remaining grinding technology related equipment may not be recoverable. The fair value of the assets was determined through a market approach using the net realizable value of the assets, which indicated that the assets were impaired and resulted in an impairment change of $673 during the three and nine months ended September 30, 2021. The long-lived assets impaired had a remaining fair value of $148. During the three months ended September 30, 2020, as a result of the expiration of the purchase option previously held by a customer and a third party on the Company's structural fill sites, the Company determined that a triggering event had occurred that indicated that the asset group may not be recoverable as the option expiration led to a significant adverse change in the manner in which the long-lived asset was being used. The Company evaluated the recoverability of the structural fill site assets to be held and used by comparing the carrying amount of the asset group to the future net undiscounted cash flows expected to be generated to determine if the carrying value is not recoverable. The recoverability test indicated that these assets were not recoverable. The fair value of the assets was determined using an income approach of the discounted cash flows expected from the assets and compared to the assets' carrying value, which indicated that the assets were impaired and resulted in an impairment charge. The Company recognized an impairment charge of $6,399 during the three and nine months ended September 30, 2020. Purchase option liability As part of the transaction in which BCP acquired a 76% equity position of Charah Management (the “BCP transaction”), Charah recorded the fair value of a bargain purchase liability for options held by a customer and a third party for the structural fill sites. The purchase option liability was calculated as the difference between the estimated fair value of the structural fill sites at the date of the BCP transaction and the option price to be paid by the customer or third party. The purchase options were exercisable after completion of work at the structural fill sites. The options expired without exercise in August 2020, and the remaining purchase option liability was reduced through amortization expense within general and administrative expenses in our unaudited condensed consolidated statement of operations. The following table reflects activity related to the bargain purchase liability: Three Months Ended Nine Months Ended September 30, September 30, 2021 2020 2021 2020 Balance, beginning of period $ — $ 7,110 $ — $ 7,110 Amortization expense: provision — (7,110) — (7,110) Balance, end of period $ — $ — $ — $ — Capital leases The following table shows the components of capital lease assets, net: September 30, 2021 December 31, 2020 Capital lease assets $ 18,644 $ 6,627 Less: accumulated depreciation (2,374) (368) Capital lease assets, net $ 16,270 $ 6,259 The Company's depreciation of capital lease assets is included within depreciation expense as disclosed above. Sales-type lease In March 2021, the Company amended an existing ground lease with a third party concerning one of the Company's structural fill assets with a 30-year term expiring on December 31, 2050. The lease includes multiple options that may be exercised at any time during the lease term for the lessee to purchase all or a portion of the premises as well as a put option (the “Put Option”) that provides the Company the option to require the lessee to purchase all of the premises at the end of the lease term. In accordance with ASC 840, Leases , the Company considered whether this lease, as amended, met any of the following four criteria as part of classifying the lease at the amendment date: (a) the lease transfers ownership of the property to the lessee by the end of the lease term; (b) the lease contains a bargain purchase option; (c) the lease term is equal to 75 percent or more of the estimated economic life of the lease property; and (d) the present value of the minimum lease payments, excluding executory costs, equals or exceeds 90 percent of the excess of the fair value of the lease property to the lessor at lease inception. This lease was recorded as a sales-type capital lease due to the Put Option provision contained within the lease agreement that represents a transfer of ownership of the property by the end of the lease term. Additionally, the Company determined that collectability of the lease payments was reasonably assured and that there were not any significant uncertainties related to costs that it has yet to incur with respect to the lease. At the amendment date of the lease, a discount rate of 3.9% implicit in the sales-type lease was used to calculate the present value of the minimum lease payments, which the Company recorded as a lease receivable. The Company recognized a gain of $5,568 within operating income in the accompanying unaudited condensed consolidated statements of operations. The following table reflects the classification of the lease receivable within our accompanying unaudited condensed consolidated balance sheet: September 30, 2021 Lease receivable $ 5,953 Less: current portion in prepaid expenses and other current assets (64) Non-current portion in other assets $ 5,889 Asset sale agreement In June 2021, the Company consummated an asset sale with an unrelated third party in which the Company assigned a lease agreement to the purchaser and sold certain grinding-related inventory and fixed assets for an aggregate sale price of $2,852. The Company received $1,250 in cash at closing with the remaining portion to be paid over time on specified dates, with the final payment to be received 36 months from the closing date. The Company determined that the note receivable included a significant financing component. As a result, the sale price and gain on sale were determined on a discounted cash flow basis. The Company recognized a gain of $1,187 within gains on sales of fixed assets in the accompanying unaudited condensed consolidated statements of operations. The following table reflects the classification of the note receivable within our accompanying unaudited condensed consolidated balance sheet: September 30, 2021 Note receivable $ 1,602 Less: current portion in prepaid expenses and other current assets (500) Non-current portion in other assets $ 1,102 Accrued liabilities The following table shows the components of accrued liabilities: September 30, 2021 December 31, 2020 Accrued expenses $ 16,602 $ 19,323 Accrued working capital adjustment for the Allied Transaction — 6,954 Accrued payroll and bonuses 2,028 7,227 Accrued preferred stock dividends 1,946 1,356 Accrued interest 1,147 77 Accrued liabilities $ 21,723 $ 34,937 Asset Retirement Obligations The Company owns one structural fill site with continuing maintenance and monitoring requirements after its closure and four tracts of real property with decommissioning, remediation and monitoring requirements. As of September 30, 2021 and December 31, 2020, the Company has accrued $49,967 and $5,159, respectively, for these asset retirement obligations. The following table reflects the activity for the asset retirement obligations: Three Months Ended Nine Months Ended September 30, September 30, 2021 2020 2021 2020 Balance, beginning of period 52,361 $ 10,948 $ 5,159 $ 15,131 Liabilities acquired (See Note 5) — — 50,590 — Liabilities settled (1,805) (2,009) (5,980) (6,542) Gain on ARO settlement (1,127) — (1,127) — Change in estimated cash flows — (2,127) — (2,127) Accretion 538 135 1,325 485 Balance, end of period 49,967 6,947 49,967 6,947 Less: current portion (32,181) (2,921) (32,181) (2,921) Non-current portion 17,786 $ 4,026 $ 17,786 $ 4,026 During the three and nine months ended September 30, 2021, the Company recognized a gain on ARO settlement of $1,127 representing differences between the estimated costs used in the measurement of the fair value of the Company's AROs and the actual expenditures incurred for specific remediation tasks performed during the three and nine months ended September 30, 2021. During the three and nine months ended September 30, 2020, the Company performed a review of the asset retirement obligation to determine if there had been changes in the estimated amount or timing of cash flows. The Company identified a downward adjustment of $2,127 primarily due to the refinement of cost information associated with project bonding and insurance and the decrease in actual closure costs incurred since the site has ceased operations. The Company views the asset retirement obligation and the related structural fill site asset as a single asset so we first recorded a reduction of $279 to the carrying value of the asset and then recorded the excess balance of $1,848 as a reduction to cost of sales in the accompanying unaudited condensed consolidated statement of operations.

Equity Method Investment

Equity Method Investment	9 Months Ended
	Sep. 30, 2021
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investment	Equity Method Investment Charah has an investment in a company that provides ash management and remarketing services to the electric utility industry. Charah accounts for its investment under the equity method of accounting because Charah has significant influence over the financial and operating policies of the company. Charah had a payable to the equity method investment of $2 at September 30, 2021 and a receivable due from the equity method investment of $182 at December 31, 2020. In December 2020, the Company informed our joint venture partner of our decision to exit the joint venture due to unfavorable economic conditions associated with a new contract that would adversely impact the future earnings capacity of our investment. In 2021, the joint venture sold its property and equipment at an amount exceeding carrying value and continues to settle its remaining current assets and liabilities through the normal course of business. Summarized balance sheet information of our equity method investment entity is as follows: September 30, 2021 December 31, 2020 Current assets $ 14 $ 1,812 Noncurrent assets — 282 Total assets $ 14 $ 2,094 Current liabilities — 432 Equity of Charah 7 831 Equity of joint venture partner 7 831 Total liabilities and members’ equity $ 14 $ 2,094 Summarized financial performance of our equity method investment entity is as follows: Three Months Ended Nine Months Ended September 30, September 30, 2021 2020 2021 2020 Revenue $ — $ 2,353 $ 555 $ 5,377 Net (loss) income — 1,252 382 2,495 Charah Solutions’ share of net (loss) income — 625 191 1,247 The following table reflects our proportional ownership activity in our investment account: Three Months Ended Nine Months Ended September 30, September 30, 2021 2020 2021 2020 Opening balance $ 7 $ 4,851 $ 831 $ 5,078 Distributions — (381) (1,015) (1,230) Share of net (loss) income — 625 191 1,247 Closing balance $ 7 $ 5,095 $ 7 $ 5,095

Related Party Transactions

Related Party Transactions	9 Months Ended
	Sep. 30, 2021
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions ATC Group Services LLC (“ATC”), an entity owned by BCP, our majority stockholder, provided environmental consulting and engineering services at certain service sites. Expenses to ATC were $4 and $111 for the three months ended September 30, 2021 and 2020, respectively, and $83 and $205 for the nine months ended September 30, 2021 and 2020, respectively. The Company had no receivables outstanding from ATC at September 30, 2021 and December 31, 2020. The Company had payables and accrued expenses, net of credit memos, due to ATC of $4 and $29 at September 30, 2021 and December 31, 2020, respectively. As further discussed in Note 4, Discontinued Operations, in November 2020, the Company sold its Allied subsidiary to an affiliate of BCP. As further discussed in Note 11, Long-term Debt, in August 2021, the Company completed an offering of $135,000, in the aggregate, of the Company’s 8.50% Senior Notes due 2026 (the “Notes”), which amount included the exercise by the underwriters of their option to purchase an additional $5,000 aggregate principal amount of Notes. B. Riley Securities, Inc. (“B. Riley”), a shareholder of the Company with board representation, served as the lead book-running manager and underwriter for this offering, purchasing a principal amount of $80,325 of the Notes. Fees paid to B. Riley related to this offering were $7,914 for the three and nine months ended September 30, 2021. These fees were capitalized as debt issuance costs within notes payable, less current maturities in the accompanying unaudited condensed consolidated balance sheets and will be amortized prospectively through interest expense, net in the accompanying unaudited condensed consolidated statements of operations using the effective interest method through the maturity date of the Notes. In addition, Charah, LLC, a Kentucky limited liability company and indirect subsidiary of the Company, issued a promissory note in exchange for cash in favor of B. Riley Commercial Capital, LLC, an affiliate of B. Riley, evidencing a loan in aggregate principal amount of $17,852. As further discussed in Note 13, Mezzanine Equity, in March 2020, the Company entered into an agreement with an investment fund affiliated with BCP to sell 26,000 shares of Preferred Stock.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	9 Months Ended
	Sep. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	Goodwill and Intangible Assets Goodwill and indefinite-lived intangible assets are not amortized but instead are tested for impairment annually or more often if events or changes in circumstances indicate that the fair value of the asset may have decreased below its carrying value. We perform our impairment test effective October 1st of each year and evaluate for impairment indicators between annual impairment tests, of which there were none. There was no goodwill activity during the nine months ended September 30, 2021. Indefinite-Lived and Definite-Lived Intangible Assets Our intangible assets, net include a trade name and water rights that are considered to have indefinite lives. As further discussed in Note 5, Asset Acquisition , in February 2021, the Company acquired an indefinite-lived intangible asset for water rights through the Gibbons Creek Transaction. Our intangible assets, net include customer relationships that are considered to have a definite life. Our customer relationships are amortized on a straight-line basis over their estimated useful lives of 10 years. The amortization expense of our definite-lived intangible assets was $1,974 and $2,215 for the three months ended September 30, 2021 and 2020, respectively and $5,921 and $6,367 for the nine months ended September 30, 2021 and 2020, respectively. The Company’s intangible assets consist of the following: September 30, 2021 December 31, 2020 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Definite-lived intangibles Customer relationships $ 78,942 $ (36,753) $ 42,189 $ 78,942 $ (30,832) $ 48,110 Indefinite-lived intangibles Charah trade name 13,316 13,316 Water rights 5,196 — Total 18,512 13,316 Total $ 60,701 $ 61,426

Long-term Debt

Long-term Debt	9 Months Ended
	Sep. 30, 2021
Debt Disclosure [Abstract]
Long-term Debt	Long-term Debt Senior Notes On August 25, 2021, the Company completed an offering of $135,000, in the aggregate, of the Company’s Notes, which amount includes the exercise by the underwriters of their option to purchase an additional $5,000 aggregate principal amount of Notes. The Notes were sold pursuant to the Company’s Registration Statement on Form S-1, as amended (File No. 333-258650), which was declared effective by the Securities and Exchange Commission on August 20, 2021. The Notes were issued pursuant to the First Supplemental Indenture (the “First Supplemental Indenture”), dated as of August 25, 2021, between the Company and Wilmington Savings Fund Society, FSB, as trustee (the “Trustee”). The First Supplemental Indenture supplements the Indenture entered into by and between the Company and the Trustee, dated as of August 25, 2021 (the “Base Indenture” and, together with the First Supplemental Indenture, the “Indenture”). The public offering price of the Notes was 100.0% of the principal amount. The Company received proceeds before payment of expenses and other fees of $135,000. The Company used the proceeds, along with cash from the sale of equity to B. Riley, to fully repay and terminate the Company’s Credit Facility, as defined below, with any remaining proceeds to be used for general corporate purposes, including funding future acquisitions and investments, repaying indebtedness, making capital expenditures and funding working capital. The Notes bear interest at the rate of 8.50% per annum. Interest on the Notes is payable quarterly in arrears on January 31, April 30, July 31 and October 31 of each year, commencing October 31, 2021. The Notes will mature on August 31, 2026. The Company may redeem the Notes for cash in whole or in part at any time (i) on or after August 31, 2023 and prior to August 31, 2024, at a price equal to 103% of their principal amount, plus accrued and unpaid interest to, but excluding, the date of redemption, (ii) on or after August 31, 2024 and prior to August 31, 2025, at a price equal to 102% of their principal amount, plus accrued and unpaid interest to, but excluding, the date of redemption, and (iii) on or after August 31, 2025 and prior to maturity, at a price equal to 100% of their principal amount, plus accrued and unpaid interest to, but excluding, the date of redemption. On and after any redemption date, interest will cease to accrue on the redeemed Notes. If the Company is redeeming less than all of the Notes, the Trustee will select the Notes to be redeemed by such method as the Trustee deems fair and appropriate in accordance with methods generally used at the time of selection by fiduciaries in similar circumstances. The Indenture also contains customary event of default and cure provisions. If an uncured default occurs and is continuing, the Trustee or the holders of not less than 25% in aggregate principal amount of the Notes may declare the Notes to be immediately due and payable. The Notes are senior unsecured obligations of the Company and rank equal in right of payment with the Company’s existing and future senior unsecured indebtedness. As a result of the issuance of the Notes, $11,932 of third-party fees were capitalized as debt issuance costs that will be amortized through interest expense, net in the accompanying unaudited condensed consolidated statements of operations using the effective interest method through the maturity date of the Notes. Asset-Based Lending Credit Agreement On November 9, 2021, the Company entered into a new Credit Agreement (the “Credit Agreement”) with JPMorgan Chase Bank, N.A. (“JPMorgan”), as administrative agent, the lenders party thereto and certain subsidiary guarantors named therein. The Credit Agreement provides for a four-year senior secured revolving credit facility with initial aggregate commitments from the lenders of $30,000, which includes $5,000 available for swingline loans, plus an additional $5,000 of capacity available for the issuance of letters of credit if supported by cash collateral provided by the Company (with a right to increase such amount by up to an additional $5,000) (“Aggregate Revolving Commitments”). Availability under the Credit Agreement is subject to a borrowing base calculated based on the value of certain eligible accounts receivable, inventory, and equipment of the Company and subject to redeterminations made in good faith and in the exercise of permitted discretion of JPMorgan. Proceeds of the Credit Agreements may be used for working capital and general corporate purposes. The Credit Agreement provides for borrowings of either base rate loans or Eurodollar loans. Principal amounts borrowed are payable on the maturity date with such borrowings bearing interest that is payable (i) with respect to base rate loans, monthly and (ii) with respect to Eurodollar loans, the last day of each Interest Period (as defined below); provided that if any Interest Period for a Eurodollar loan exceeds three months, interest will be payable on the respective dates that fall every three months after the beginning of such Interest Period. Eurodollar Loans bear interest at a rate per annum equal to the Adjusted LIBOR for one, three or six months (the “Interest Period”), plus an applicable margin of 2.25%. Base rate loans bear interest at a rate per annum equal to the greatest of (i) the agent bank’s reference rate, (ii) the federal funds effective rate plus 50 basis points and (iii) the rate for one month Adjusted LIBOR loans plus 100 basis points, plus an applicable rate of 125 basis points. The Credit Agreement is guaranteed by certain of the Company’s subsidiaries and is secured by substantially all of the Company’s and such subsidiaries’ assets. The Credit Agreement contains customary restrictive covenants for asset-based loans that may limit the Company’s ability to, among other things: incur additional indebtedness, sell assets, make loans to others, make investments, enter into mergers, make certain restricted payments, incur liens, and engage in certain other transactions without the prior consent of the lenders. A covenant testing period (“Covenant Testing Period”) is a period in which excess availability (which is defined in the Credit Agreement as the sum of availability and an amount up to $1,000), is less than the greater of (a) 12.5% of the lesser of the aggregate revolving commitments and the borrowing base, (b) the lesser of $7,500 and the PP&E Component as defined in the Credit Agreement, and (c) $3,500, for three consecutive business days. During a Covenant Testing Period, the Credit Agreement requires the Company to maintain a fixed charge coverage ratio as defined in the Credit Agreement, determined for any period of twelve (12) consecutive months ending on the last day of each fiscal quarter, of at least 1.00 to 1.00. Letter of Credit Cash Collateralization Promissory Note On August 25, 2021, Charah, LLC issued a Secured Promissory Note (the “Promissory Note”), as the borrower, in favor of B. Riley Commercial Capital, LLC, as the noteholder (the “Noteholder”), evidencing a loan in aggregate principal amount of $17,852 made by the Noteholder to Charah, LLC. The loan outstanding under the Promissory Note bears interest at a rate of eight percent (8%) per annum and matures on the thirteen-month anniversary of the effective date of the Promissory Note. The proceeds of the Promissory Note will be used by the Company and its subsidiaries to collateralize the Company's existing letters of credit issued through Bank of America, N.A., and will be repaid as such cash collateral is released to the Company or Charah, LLC, as applicable. The cash proceeds from the Promissory Note are classified within restricted cash in the accompanying unaudited condensed consolidated balance sheets as such cash is maintained in a restricted bank account until such cash collateral is released. Outstanding letters of credit were $17,459 and $11,079 as of September 30, 2021 and December 31, 2020. Pursuant to the terms of the Promissory Note, Charah, LLC will be subject to certain covenants and restrictive provisions which will, among other things, limit Charah, LLC’s ability to incur additional indebtedness for borrowed money or additional liens; consolidate, merge or transfer all or substantially all of our assets; make certain restricted payments; modify certain material agreements; engage in certain types of transactions with affiliates; each of which will be subject to customary and usual exceptions and baskets. The loan evidenced by the Promissory Note is secured by a pledge of substantially all of the assets of Charah, LLC, subject to certain customary exceptions and limitations. Credit Agreement On September 21, 2018, we entered into a credit agreement (the “Credit Facility”) by and among us, the lenders party thereto from time to time and Bank of America, N.A., as administrative agent (the “Administrative Agent”). The Credit Facility included: • A revolving loan not to exceed $50,000 (the “Revolving Loan”); • A term loan of $205,000 (the “Closing Date Term Loan”); and • A commitment to loan up to a further $25,000 in term loans, which expired in March 2020 (the “Delayed Draw Commitment” and the term loans funded under such Delayed Draw Commitment, the “Delayed Draw Term Loan,” together with the Closing Date Term Loan, the “Term Loan”). Pursuant to the terms of the Credit Facility and its related amendments, all amounts associated with the Revolving Loan and the Term Loan under the Credit Facility were set to mature in July 2022. The interest rates per annum applicable to the loans under the Credit Facility were based on a fluctuating rate of interest measured by reference to, at our election, either (i) the Eurodollar rate, currently LIBOR, or (ii) an alternative base rate. Various margins were added to the interest rate based upon our consolidated net leverage ratio (as defined in the Credit Facility). Customary fees were payable regarding the Credit Facility and included (i) commitment fees for the unused portions of the Credit Facility and (ii) fees on outstanding letters of credit. Amounts borrowed under the Credit Facility were secured by substantially all of the assets of the Company. The Credit Facility contained various customary representations, warranties, restrictive covenants, certain affirmative covenants, including reporting requirements, and customary events of default. During the three months ended September 30, 2021, using the proceeds from the Notes, along with cash from the sale of equity to B. Riley, to fully repay and terminate the Credit Facility, the Company paid $114,123 of outstanding principal on the Closing Date Loan and $12,340 of outstanding loans on the Revolver. Further, the Company paid $2,000 of previously accrued fees required as consideration for Amendment No. 3 to Credit Agreement that was otherwise due and payable on the maturity date. During the three and nine months ended September 30, 2021, the Company wrote off unamortized debt issuance costs of $638 as a result of this refinancing, which is included in loss on extinguishment of debt in the accompanying unaudited condensed consolidated statements of operations. The following table summarizes the major components of debt at each balance sheet date and provides maturities and interest rate ranges for each major category as of September 30, 2021 and December 31, 2020: September 30, 2021 December 31, 2020 Various equipment notes entered into in November 2017, payable in monthly installments ranging from $6 to $24, including interest at 5.2%, maturing in December 2022 through December 2023. The notes are secured by equipment with a net book value of $1,277 as of September 30, 2021. $ 2,034 $ 2,871 Various equipment notes entered into in 2018, payable in monthly installments ranging from $1 to $39, including interest ranging from 5.6% to 6.8%, maturing in March 2023 through May 2025. The notes are secured by equipment with a net book value of $5,960 as of September 30, 2021. 6,465 8,446 Various equipment notes entered into in 2019, payable in monthly installments ranging from $2 to $23, including interest ranging from 3.9% to 6.4%, maturing in April 2024 through December 2024. The notes are secured by equipment with a net book value of $2,748 as of September 30, 2021. 2,847 3,490 Various equipment notes entered into in 2020, payable in monthly installments ranging from $9 to $10, including interest of 5.4%, maturing in August 2025. The notes are secured by equipment with a net book value of $1,882 as of September 30, 2021. 1,723 2,011 Various equipment notes entered into in 2021, payable in monthly installments ranging from $3 to $9, including interest ranging from 4.0% to 6.5%, maturing in February 2026 through August 2026. The notes are secured by equipment with a net book value of $1,789 as of September 30, 2021. 1,953 — Various commercial insurance premium financing agreements entered into in 2020, payable in monthly installments ranging from $22 to $126, including interest ranging from 3.4% to 3.8%, that matured in February and March 2021. — 453 Various commercial insurance premium financing agreements entered into in 2021, payable in monthly installments ranging from $24 to $117, including interest ranging from 3.0% to 3.9%, maturing in October 2021 through April 2022. 837 — A $10,000 equipment line with a bank, entered into in December 2017, secured by all equipment purchased with the proceeds of the loan. Interest is calculated on any outstanding amounts using a fixed rate of 4.5%. The equipment line converted to a term loan in September 2018 with a maturity date of June 22, 2023. The term loan is secured by equipment with a net book value of $2,700 as of September 30, 2021. 4,123 5,791 The Closing Date Term Loan and the Delayed Draw Term Loan entered into in September 2018 as part of the Syndicated Credit Facility (see Note 11). In August 2021, the Credit Facility was terminated and the full outstanding principal balance was repaid. — 125,239 The Notes entered into in August 2021 (see Note 11). The Notes are senior unsecured obligations of the Company and rank equal in right of payment with the Company’s existing and future senior unsecured indebtedness. 135,000 — The Promissory Note entered into in August 2021 as part of the Letter of Credit Cash Collateralization Promissory Note (see Note 11). The loan evidenced by the Promissory Note is secured by a pledge of substantially all of the assets of Charah, LLC, subject to certain customary exceptions and limitations. 17,852 — Total 172,834 148,301 Less debt issuance costs, net (11,728) (1,024) 161,106 147,277 Less current maturities (25,533) (22,308) Notes payable due after one year $ 135,573 $ 124,969

Notes Payable

Notes Payable	9 Months Ended
	Sep. 30, 2021
Debt Disclosure [Abstract]
Notes Payable	Long-term Debt Senior Notes On August 25, 2021, the Company completed an offering of $135,000, in the aggregate, of the Company’s Notes, which amount includes the exercise by the underwriters of their option to purchase an additional $5,000 aggregate principal amount of Notes. The Notes were sold pursuant to the Company’s Registration Statement on Form S-1, as amended (File No. 333-258650), which was declared effective by the Securities and Exchange Commission on August 20, 2021. The Notes were issued pursuant to the First Supplemental Indenture (the “First Supplemental Indenture”), dated as of August 25, 2021, between the Company and Wilmington Savings Fund Society, FSB, as trustee (the “Trustee”). The First Supplemental Indenture supplements the Indenture entered into by and between the Company and the Trustee, dated as of August 25, 2021 (the “Base Indenture” and, together with the First Supplemental Indenture, the “Indenture”). The public offering price of the Notes was 100.0% of the principal amount. The Company received proceeds before payment of expenses and other fees of $135,000. The Company used the proceeds, along with cash from the sale of equity to B. Riley, to fully repay and terminate the Company’s Credit Facility, as defined below, with any remaining proceeds to be used for general corporate purposes, including funding future acquisitions and investments, repaying indebtedness, making capital expenditures and funding working capital. The Notes bear interest at the rate of 8.50% per annum. Interest on the Notes is payable quarterly in arrears on January 31, April 30, July 31 and October 31 of each year, commencing October 31, 2021. The Notes will mature on August 31, 2026. The Company may redeem the Notes for cash in whole or in part at any time (i) on or after August 31, 2023 and prior to August 31, 2024, at a price equal to 103% of their principal amount, plus accrued and unpaid interest to, but excluding, the date of redemption, (ii) on or after August 31, 2024 and prior to August 31, 2025, at a price equal to 102% of their principal amount, plus accrued and unpaid interest to, but excluding, the date of redemption, and (iii) on or after August 31, 2025 and prior to maturity, at a price equal to 100% of their principal amount, plus accrued and unpaid interest to, but excluding, the date of redemption. On and after any redemption date, interest will cease to accrue on the redeemed Notes. If the Company is redeeming less than all of the Notes, the Trustee will select the Notes to be redeemed by such method as the Trustee deems fair and appropriate in accordance with methods generally used at the time of selection by fiduciaries in similar circumstances. The Indenture also contains customary event of default and cure provisions. If an uncured default occurs and is continuing, the Trustee or the holders of not less than 25% in aggregate principal amount of the Notes may declare the Notes to be immediately due and payable. The Notes are senior unsecured obligations of the Company and rank equal in right of payment with the Company’s existing and future senior unsecured indebtedness. As a result of the issuance of the Notes, $11,932 of third-party fees were capitalized as debt issuance costs that will be amortized through interest expense, net in the accompanying unaudited condensed consolidated statements of operations using the effective interest method through the maturity date of the Notes. Asset-Based Lending Credit Agreement On November 9, 2021, the Company entered into a new Credit Agreement (the “Credit Agreement”) with JPMorgan Chase Bank, N.A. (“JPMorgan”), as administrative agent, the lenders party thereto and certain subsidiary guarantors named therein. The Credit Agreement provides for a four-year senior secured revolving credit facility with initial aggregate commitments from the lenders of $30,000, which includes $5,000 available for swingline loans, plus an additional $5,000 of capacity available for the issuance of letters of credit if supported by cash collateral provided by the Company (with a right to increase such amount by up to an additional $5,000) (“Aggregate Revolving Commitments”). Availability under the Credit Agreement is subject to a borrowing base calculated based on the value of certain eligible accounts receivable, inventory, and equipment of the Company and subject to redeterminations made in good faith and in the exercise of permitted discretion of JPMorgan. Proceeds of the Credit Agreements may be used for working capital and general corporate purposes. The Credit Agreement provides for borrowings of either base rate loans or Eurodollar loans. Principal amounts borrowed are payable on the maturity date with such borrowings bearing interest that is payable (i) with respect to base rate loans, monthly and (ii) with respect to Eurodollar loans, the last day of each Interest Period (as defined below); provided that if any Interest Period for a Eurodollar loan exceeds three months, interest will be payable on the respective dates that fall every three months after the beginning of such Interest Period. Eurodollar Loans bear interest at a rate per annum equal to the Adjusted LIBOR for one, three or six months (the “Interest Period”), plus an applicable margin of 2.25%. Base rate loans bear interest at a rate per annum equal to the greatest of (i) the agent bank’s reference rate, (ii) the federal funds effective rate plus 50 basis points and (iii) the rate for one month Adjusted LIBOR loans plus 100 basis points, plus an applicable rate of 125 basis points. The Credit Agreement is guaranteed by certain of the Company’s subsidiaries and is secured by substantially all of the Company’s and such subsidiaries’ assets. The Credit Agreement contains customary restrictive covenants for asset-based loans that may limit the Company’s ability to, among other things: incur additional indebtedness, sell assets, make loans to others, make investments, enter into mergers, make certain restricted payments, incur liens, and engage in certain other transactions without the prior consent of the lenders. A covenant testing period (“Covenant Testing Period”) is a period in which excess availability (which is defined in the Credit Agreement as the sum of availability and an amount up to $1,000), is less than the greater of (a) 12.5% of the lesser of the aggregate revolving commitments and the borrowing base, (b) the lesser of $7,500 and the PP&E Component as defined in the Credit Agreement, and (c) $3,500, for three consecutive business days. During a Covenant Testing Period, the Credit Agreement requires the Company to maintain a fixed charge coverage ratio as defined in the Credit Agreement, determined for any period of twelve (12) consecutive months ending on the last day of each fiscal quarter, of at least 1.00 to 1.00. Letter of Credit Cash Collateralization Promissory Note On August 25, 2021, Charah, LLC issued a Secured Promissory Note (the “Promissory Note”), as the borrower, in favor of B. Riley Commercial Capital, LLC, as the noteholder (the “Noteholder”), evidencing a loan in aggregate principal amount of $17,852 made by the Noteholder to Charah, LLC. The loan outstanding under the Promissory Note bears interest at a rate of eight percent (8%) per annum and matures on the thirteen-month anniversary of the effective date of the Promissory Note. The proceeds of the Promissory Note will be used by the Company and its subsidiaries to collateralize the Company's existing letters of credit issued through Bank of America, N.A., and will be repaid as such cash collateral is released to the Company or Charah, LLC, as applicable. The cash proceeds from the Promissory Note are classified within restricted cash in the accompanying unaudited condensed consolidated balance sheets as such cash is maintained in a restricted bank account until such cash collateral is released. Outstanding letters of credit were $17,459 and $11,079 as of September 30, 2021 and December 31, 2020. Pursuant to the terms of the Promissory Note, Charah, LLC will be subject to certain covenants and restrictive provisions which will, among other things, limit Charah, LLC’s ability to incur additional indebtedness for borrowed money or additional liens; consolidate, merge or transfer all or substantially all of our assets; make certain restricted payments; modify certain material agreements; engage in certain types of transactions with affiliates; each of which will be subject to customary and usual exceptions and baskets. The loan evidenced by the Promissory Note is secured by a pledge of substantially all of the assets of Charah, LLC, subject to certain customary exceptions and limitations. Credit Agreement On September 21, 2018, we entered into a credit agreement (the “Credit Facility”) by and among us, the lenders party thereto from time to time and Bank of America, N.A., as administrative agent (the “Administrative Agent”). The Credit Facility included: • A revolving loan not to exceed $50,000 (the “Revolving Loan”); • A term loan of $205,000 (the “Closing Date Term Loan”); and • A commitment to loan up to a further $25,000 in term loans, which expired in March 2020 (the “Delayed Draw Commitment” and the term loans funded under such Delayed Draw Commitment, the “Delayed Draw Term Loan,” together with the Closing Date Term Loan, the “Term Loan”). Pursuant to the terms of the Credit Facility and its related amendments, all amounts associated with the Revolving Loan and the Term Loan under the Credit Facility were set to mature in July 2022. The interest rates per annum applicable to the loans under the Credit Facility were based on a fluctuating rate of interest measured by reference to, at our election, either (i) the Eurodollar rate, currently LIBOR, or (ii) an alternative base rate. Various margins were added to the interest rate based upon our consolidated net leverage ratio (as defined in the Credit Facility). Customary fees were payable regarding the Credit Facility and included (i) commitment fees for the unused portions of the Credit Facility and (ii) fees on outstanding letters of credit. Amounts borrowed under the Credit Facility were secured by substantially all of the assets of the Company. The Credit Facility contained various customary representations, warranties, restrictive covenants, certain affirmative covenants, including reporting requirements, and customary events of default. During the three months ended September 30, 2021, using the proceeds from the Notes, along with cash from the sale of equity to B. Riley, to fully repay and terminate the Credit Facility, the Company paid $114,123 of outstanding principal on the Closing Date Loan and $12,340 of outstanding loans on the Revolver. Further, the Company paid $2,000 of previously accrued fees required as consideration for Amendment No. 3 to Credit Agreement that was otherwise due and payable on the maturity date. During the three and nine months ended September 30, 2021, the Company wrote off unamortized debt issuance costs of $638 as a result of this refinancing, which is included in loss on extinguishment of debt in the accompanying unaudited condensed consolidated statements of operations. The following table summarizes the major components of debt at each balance sheet date and provides maturities and interest rate ranges for each major category as of September 30, 2021 and December 31, 2020: September 30, 2021 December 31, 2020 Various equipment notes entered into in November 2017, payable in monthly installments ranging from $6 to $24, including interest at 5.2%, maturing in December 2022 through December 2023. The notes are secured by equipment with a net book value of $1,277 as of September 30, 2021. $ 2,034 $ 2,871 Various equipment notes entered into in 2018, payable in monthly installments ranging from $1 to $39, including interest ranging from 5.6% to 6.8%, maturing in March 2023 through May 2025. The notes are secured by equipment with a net book value of $5,960 as of September 30, 2021. 6,465 8,446 Various equipment notes entered into in 2019, payable in monthly installments ranging from $2 to $23, including interest ranging from 3.9% to 6.4%, maturing in April 2024 through December 2024. The notes are secured by equipment with a net book value of $2,748 as of September 30, 2021. 2,847 3,490 Various equipment notes entered into in 2020, payable in monthly installments ranging from $9 to $10, including interest of 5.4%, maturing in August 2025. The notes are secured by equipment with a net book value of $1,882 as of September 30, 2021. 1,723 2,011 Various equipment notes entered into in 2021, payable in monthly installments ranging from $3 to $9, including interest ranging from 4.0% to 6.5%, maturing in February 2026 through August 2026. The notes are secured by equipment with a net book value of $1,789 as of September 30, 2021. 1,953 — Various commercial insurance premium financing agreements entered into in 2020, payable in monthly installments ranging from $22 to $126, including interest ranging from 3.4% to 3.8%, that matured in February and March 2021. — 453 Various commercial insurance premium financing agreements entered into in 2021, payable in monthly installments ranging from $24 to $117, including interest ranging from 3.0% to 3.9%, maturing in October 2021 through April 2022. 837 — A $10,000 equipment line with a bank, entered into in December 2017, secured by all equipment purchased with the proceeds of the loan. Interest is calculated on any outstanding amounts using a fixed rate of 4.5%. The equipment line converted to a term loan in September 2018 with a maturity date of June 22, 2023. The term loan is secured by equipment with a net book value of $2,700 as of September 30, 2021. 4,123 5,791 The Closing Date Term Loan and the Delayed Draw Term Loan entered into in September 2018 as part of the Syndicated Credit Facility (see Note 11). In August 2021, the Credit Facility was terminated and the full outstanding principal balance was repaid. — 125,239 The Notes entered into in August 2021 (see Note 11). The Notes are senior unsecured obligations of the Company and rank equal in right of payment with the Company’s existing and future senior unsecured indebtedness. 135,000 — The Promissory Note entered into in August 2021 as part of the Letter of Credit Cash Collateralization Promissory Note (see Note 11). The loan evidenced by the Promissory Note is secured by a pledge of substantially all of the assets of Charah, LLC, subject to certain customary exceptions and limitations. 17,852 — Total 172,834 148,301 Less debt issuance costs, net (11,728) (1,024) 161,106 147,277 Less current maturities (25,533) (22,308) Notes payable due after one year $ 135,573 $ 124,969

Mezzanine Equity

Mezzanine Equity	9 Months Ended
	Sep. 30, 2021
Temporary Equity Disclosure [Abstract]
Mezzanine Equity	Mezzanine EquityIn March 2020, the Company entered into an agreement with an investment fund affiliated with BCP to sell 26 (twenty-six thousand) shares of Series A Preferred Stock, par value $0.01 per share (the “Preferred Stock”), with an initial aggregate liquidation preference of $26,000, net of a 3% Original Issue Discount (“OID”) of $780 for net proceeds of $25,220 in a private placement (the “Preferred Stock Offering”). Proceeds from the Preferred Stock Offering were used for liquidity and general corporate purposes. In connection with the issuance of the Preferred Stock, the Company incurred direct expenses of $966, including financial advisory fees, closing costs, legal expenses and other offering-related expenses. The Preferred Stock was initially recorded net of OID and direct expenses, which will be accreted through paid-in-capital as a deemed dividend from the date of issuance through the first possible known redemption date, March 16, 2023. As of September 30, 2021 and December 31, 2020, the Company had accrued dividends of $997 and $906, respectively, associated with the Preferred Stock, which was recorded at a fair value of $1,946 and $1,356, respectively, using observable information for similar items and is classified as a level 2 fair value measurement. Dividend Rights The Preferred Stock ranks senior to the Company’s common stock with respect to dividend rights and rights on the distribution of assets in any voluntary or involuntary liquidation, dissolution or winding up of the affairs of the Company. The Preferred Stock had an initial liquidation preference of $1 (one thousand dollars) per share. The holders of the Preferred Stock are entitled to a cumulative dividend paid in cash at the rate of 10.0% per annum, payable on a quarterly basis. If we do not declare and pay a dividend to the holders of the Preferred Stock, the dividend rate will increase to 13.0% per annum, and the dividends are paid-in-kind by adding such amount to the liquidation preference. The Company’s intention is to pay dividends in-kind for the foreseeable future. The dividend rate will increase to 16.0% per annum upon the occurrence and during the continuance of an event of default. As of September 30, 2021, the liquidation preference of the Preferred Stock was $31,682. Conversion Features The Preferred Stock is convertible at the option of the holders at any time on and after the three-month anniversary of the date of issuance into shares of common stock at a conversion price of $2.77 per share (the “Conversion Price”), which represents a 30% premium to the 20-day volume-weighted average price ended March 4, 2020. As of September 30, 2021, the maximum number of common shares that could be required to be issued if converted is 11,438 (eleven million four hundred thirty-eight thousand). The conversion rate is subject to the following customary anti-dilution and other adjustments: • the issuance of common stock as a dividend or the subdivision, combination, or reclassification of common stock into a greater or lesser number of shares of common stock; • the dividend, distribution or other issuance of rights, options or warrants to holders of common stock entitling them to subscribe for or purchase shares of common stock at a price per share that is less than the market value for such issuance; • the issuance of a dividend or similar distribution in-kind, which can include shares of any class of capital stock, evidences of the Company’s indebtedness, assets or other property or securities, to holders of common stock; • a transaction in which a subsidiary of the Company ceases to be a subsidiary of the Company as a result of the distribution of the equity interests of the subsidiary to the holders of the Company’s common stock; and • the payment of a cash dividend to the holders of common stock. On or after the three-year anniversary of the date of issuance, if the holders have not elected to convert all their shares of Preferred Stock, the Company may give 30 days’ notice to the holders giving the holders the option to choose, in their sole discretion, to have all outstanding shares of Preferred Stock converted into shares of common stock or redeemed in cash at the then applicable Redemption Price (as defined below). The Company may not issue this conversion notice unless (i) the average volume-weighted average price per share of the Company’s common stock during each of the 20 consecutive trading days before the conversion is greater than 120% of the conversion price; (ii) the Company’s common stock is listed on a national securities exchange; (iii) a registration statement for the re-sale of the common stock is then effective; and (iv) the Company is not then in possession of material non-public information as determined by Regulation FD promulgated under the Exchange Act. The Preferred Stock and the associated dividend payable on March 31, 2020, did not generate a beneficial conversion feature (“BCF”) upon issuance as the fair value of the Company’s common stock was less than the conversion price. If a BCF is recognized, a reduction to paid-in capital and the Preferred Stock will be recorded and subsequently accreted through the first redemption date. Additionally, the Company determined that the nature of the Preferred Stock was more akin to an equity instrument and that the economic characteristics and risks of the embedded conversion options were clearly and closely related to the Preferred Stock. As such, the conversion options were not required to be bifurcated from the host under ASC 815, Derivatives and Hedging . Redemption Rights If the Company undergoes certain change of control transactions, the Company will be required to immediately make an offer to repurchase all of the then-outstanding shares of Preferred Stock for cash consideration per share equal to the greater of (i) 100% of the Liquidation Preference, plus accrued and unpaid dividends, if any, plus, if applicable for a transaction occurring before the third anniversary of the closing, a make-whole premium determined pursuant to a calculation of the present value of the dividends that would have accrued through such anniversary, discounted at a rate equal to the applicable treasury rate plus 0.50% (the “Make-Whole Premium”); provided that if the transaction occurs before the first anniversary of the closing, the Make-Whole Premium shall be no greater than $4,000 and (ii) the closing sale price of the common stock on the date of such redemption multiplied by the number of shares of common stock issuable upon conversion of the outstanding Preferred Stock. On or after the three-year anniversary of the issuance of the Preferred Stock, the Company may redeem the Preferred Stock, in whole or in part, for an amount in cash equal to the greater of (i) the closing sale price of the common stock on the date the Company delivers such notice multiplied by the number of shares of common stock issuable upon conversion of the outstanding Preferred Stock and (ii) (x) if the redemption occurs before the fourth anniversary of the date of the closing, 103% of the Liquidation Preference, plus accrued and unpaid dividends, or (y) if the redemption occurs on or after the fourth anniversary of the date of the closing, the Liquidation Preference plus accrued and unpaid dividends (the foregoing clauses (i) or (ii), as applicable, the “Redemption Price”). On or after the seven-year anniversary of the date of issuance, the holders have the right, subject to applicable law, to require the Company to redeem the Preferred Stock, in whole or in part, into cash consideration equal to the liquidation preference, plus all accrued and unpaid dividends, from any source of funds legally available for such purpose. Since the redemption of the Preferred Stock is contingently or optionally redeemable and therefore not certain to occur, the Preferred Stock is not required to be classified as a liability under ASC 480, Distinguishing Liabilities from Equity . As the Preferred Stock is redeemable in certain circumstances at the option of the holder and is redeemable in certain circumstances upon the occurrence of an event that is not solely within our control, we have classified the Preferred Stock in mezzanine equity in the accompanying unaudited condensed consolidated balance sheets. Liquidation Rights In the event of any liquidation, winding-up or dissolution of the Company, whether voluntary or involuntary, the holders of the Preferred Stock would receive an amount in cash equal to the greater of (i) 100% of the liquidation preference plus a Make-Whole Premium and (ii) the amount such holders would be entitled to receive at such time if the Preferred Stock were converted into Company common stock immediately before the liquidation event. The Make-Whole Premium is removed from the calculation for a liquidation event occurring after the third anniversary of the issuance date. Voting Rights The holders of the Preferred Stock are entitled to vote with the holders of the common stock on an as-converted basis in addition to voting as a separate class as provided by applicable Delaware law and the Company’s organizational documents. The holders, acting exclusively and as a separate class, shall have the right to appoint either a non-voting observer to the Company’s Board of Directors or one director to the Company’s Board of Directors. Registration Rights The holders of the Preferred Stock have certain customary registration rights with respect to the shares of common stock into which the Preferred Stock is converted, pursuant to the terms of a registration rights agreement.

Common Stock Issuances

Common Stock Issuances	9 Months Ended
	Sep. 30, 2021
Equity [Abstract]
Common Stock Issuances	Common Stock IssuancesDuring the three and nine months ended September 30, 2021, the Company executed a stock purchase agreement with a previously unrelated third party, B. Riley, and issued 2,889 shares of common stock at $4.50 per share in a private placement for total proceeds of $13,000. Pursuant to the terms of the stock purchase agreement, B. Riley entered into an Investor Rights Agreement and appointed one director to the Company's board of directors.

Interest Rate Swap

Interest Rate Swap	9 Months Ended
	Sep. 30, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Interest Rate Swap	Interest Rate Swap The Company entered into an interest rate swap in December 2017 whereby the Company agreed to exchange with the counterparty, at specified intervals, the difference between fixed and variable interest amounts calculated by reference to a notional amount. On August 19, 2021, the Company terminated the interest rate swap in conjunction with the termination of the Credit Facility and issuance of the Notes. In conjunction with the termination, the Company settled the outstanding liability that was previously classified within other liabilities in the consolidated balance sheet by paying $745 to the counterparty, which represented the fair value of the swap as of the termination date. The total amount of gain (loss) included in interest expense, net in the accompanying unaudited condensed consolidated statements of operations was ($11) and $65 for the three months ended September 30, 2021 and 2020, respectively, and $190 and $95 for the nine months ended September 30, 2021 and 2020, respectively.

Contract Assets and Liabilities

Contract Assets and Liabilities	9 Months Ended
	Sep. 30, 2021
Revenue from Contract with Customer [Abstract]
Contract Assets and Liabilities	Revenue We disaggregate our revenue from customers by type of service and by geographic region as we believe it best depicts how the nature, amount, timing and uncertainty of our revenue and cash flows are affected by economic factors. See details in the tables below. Three Months Ended Nine Months Ended September 30, September 30, 2021 2020 2021 2020 Byproduct sales $ 22,368 $ 22,940 $ 56,910 $ 66,101 Construction contracts 48,176 21,590 99,828 51,784 Services 13,617 18,586 43,048 48,812 Total revenue $ 84,161 $ 63,116 $ 199,786 $ 166,697 Three Months Ended Nine Months Ended September 30, September 30, 2021 2020 2021 2020 United States $ 84,161 $ 63,045 $ 199,786 $ 165,780 Foreign — 71 — 917 Total revenue $ 84,161 $ 63,116 $ 199,786 $ 166,697 As of September 30, 2021, the Company had remaining performance obligations with an aggregate transaction price of $491,066 on construction contracts for which we recognize revenue over time. We expect to recognize approximately 13% of our remaining performance obligations as revenue during the remainder of 2021, 15% in 2022, 10% in 2023, and 62% thereafter. Revenue associated with our remaining performance obligations includes performance obligations related to our construction contracts. The balance of remaining performance obligations does not include variable consideration that was determined to be constrained as of September 30, 2021. As of September 30, 2021, there were $4,837 of unapproved change orders associated with project scope changes included in determining the profit or loss on certain construction contracts, of which $1,732 were approved subsequent to quarter-end. The timing of revenue recognition, billings and cash collections results in accounts receivable, contract assets, and contract liabilities on the accompanying unaudited condensed consolidated balance sheets. Our contract assets are as follows: September 30, 2021 December 31, 2020 Costs and estimated earnings in excess of billings $ 15,395 $ 12,196 Retainage 8,116 6,133 Total contract assets $ 23,511 $ 18,329 Our contract liabilities are as follows: September 30, 2021 December 31, 2020 Billings in excess of costs and estimated earnings $ 12,447 $ 6,167 Deferred revenue 1,698 128 Total contract liabilities $ 14,145 $ 6,295 We recognized revenue of $0 and $6,295 for the three and nine months ended September 30, 2021, respectively, that was previously included in contract liabilities at December 31, 2020. The increase in contract liabilities was primarily due to an increase in billings in excess of costs and estimated earnings associated with billings during the three and nine months ended September 30, 2021 for a specific remediation and compliance project. The Company's net position on uncompleted contracts is as follows: September 30, 2021 December 31, 2020 Costs incurred on uncompleted contracts $ 169,576 $ 123,339 Estimated earnings 19,019 18,425 Total costs and estimated earnings 188,595 141,764 Less billings to date (185,647) (135,735) Net balance in process $ 2,948 $ 6,029 The net balance in process classified on the accompanying unaudited condensed consolidated balance sheets is as follows: September 30, 2021 December 31, 2020 Costs and estimated earnings in excess of billings $ 15,395 $ 12,196 Billings in excess of costs and estimated earnings (12,447) (6,167) Net balance in process $ 2,948 $ 6,029 Anticipated losses on long-term contracts are recognized when such losses become evident. As of September 30, 2021 and December 31, 2020, accruals for anticipated losses on long-term contracts were $143 and $155, respectively.

Stock_Unit Based Compensation

Stock/Unit Based Compensation	9 Months Ended
	Sep. 30, 2021
Share-based Payment Arrangement [Abstract]
Stock/Unit Based Compensation	Stock/Unit-Based Compensation The Company adopted the Charah Solutions, Inc. 2018 Omnibus Incentive Plan (the “2018 Plan”), pursuant to which employees, consultants, and directors of the Company and its affiliates, including named executive officers, are eligible to receive awards. The 2018 Plan provides for the grant of stock options, stock appreciation rights, restricted stock, restricted stock units, bonus stock, dividend equivalents, other stock-based awards, substitute awards, annual incentive awards, and performance awards intended to align the interests of participants with those of Company's stockholders. During the nine months ended September 30, 2021, the Company amended the 2018 Plan to reserve an additional 2,000 shares of common stock, for a total of 5,007 shares of common stock reserved for issuance under the 2018 Plan . During the nine months ended September 30, 2021, the Company granted 501 restricted stock units (“RSUs”) under the 2018 Plan that are time-based. Of the RSUs granted during the nine months ended September 30, 2021, 3 vested immediately, 90 vest at the end of a one-year period, and 408 vest in equal installments over three years. The fair value of these RSUs is based on the market price of the Company’s shares on the grant date. During the nine months ended September 30, 2021, the Company granted 235 performance share units (“PSUs”) under the 2018 Plan that cliff vest after three years. The vesting of these PSUs is dependent upon the following performance goals during the period January 1, 2021 through December 31, 2023 (the “Performance Period”): (i) the relative total stockholder return percentile ranking of the Company as compared to the specified performance peer group and (ii) cumulative revenue. Each performance goal is weighted at 50% in determining the number of PSUs that become earned PSUs. The maximum number of earned PSUs for the Performance Period is 200% of the target number of PSUs. The total compensation cost we will recognize under the PSUs will be determined using the Monte Carlo valuation methodology, which factors in the value of the total stockholder return market condition when determining the grant date fair value of the PSU. Compensation cost for each PSU is recognized during the Performance Period based on the probable achievement of the two performance criteria. The PSUs are converted into shares of our common stock at the time the PSU award value is finalized. A summary of the Company’s non-vested share activity for the nine months ended September 30, 2021 is as follows: Restricted Stock Performance Stock Total Shares Weighted-Average Grant Date Fair Value Shares Weighted-Average Grant Date Fair Value Shares Weighted-Average Grant Date Fair Value Balance as of December 31, 2020 981 $ 5.08 453 $ 4.02 1,434 $ 4.74 Granted 501 5.41 235 4.74 736 5.20 Forfeited (62) 7.54 (40) 4.76 (102) 6.45 Vested (535) 5.88 — — (535) 5.88 Balance as of September 30, 2021 885 $ 4.62 648 $ 4.24 1,533 $ 4.46 Restricted Stock Performance Stock Total Weighted Average Remaining Contractual Terms (Years) Aggregate Intrinsic Value Weighted Average Remaining Contractual Terms (Years) Aggregate Intrinsic Value Weighted Average Remaining Contractual Terms (Years) Aggregate Intrinsic Value Balance as of December 31, 2020 0.79 $ 2,817 1.68 $ 1,299 1.07 $ 4,116 Balance as of September 30, 2021 1.13 $ 4,072 1.51 $ 2,979 1.29 $ 7,051 Stock-based compensation expense related to the restricted stock issued was $550 and $398 during the three months ended September 30, 2021 and 2020, respectively and $1,308 and $1,413 during the nine months ended September 30, 2021 and 2020. As of September 30, 2021, total unrecognized stock-based compensation expense related to non-vested awards of restricted stock, net of estimated forfeitures, was $2,033, and is expected to be recognized over a weighted-average period of 1.37 years. The total fair value of awards vested for the three and nine months ended September 30, 2021 was $2,463.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies We were party to a lawsuit filed against North Carolina by an environmental advocacy group alleging that the issuance by the state of certain permits associated with our Brickhaven clay mine reclamation site exceeded the state’s power. In December 2020, the Company, the environmental advocacy group and the state settled, resolved and dismissed all matters. Before the settlement, all customer-related work at the Brickhaven site had been completed. The settlement allows for all completed work to remain unchanged. Per the settlement, the Company will not place any additional material at the site, will place a deed restriction requiring engineering oversight for the future development of the site and will continue groundwater monitoring at the site. In April 2021, the state approved the Company’s application to modify its permit to conform to the work as completed. The Company will continue its work with the state to complete the remaining site closure operations. Allied Power Services, LLC and its affiliate, Allied Power Resources, LLC, were named in a collective action lawsuit filed in the U.S. District Court for the Northern District of Illinois, alleging violations of the Fair Labor Standards Act. This lawsuit included related class claims alleging violations of the Illinois Minimum Wage Law and the Pennsylvania Minimum Wage Act for failure to pay overtime. This case was one of a series filed against companies in the oil, gas and energy industries in Illinois and Texas. The parties mediated this case in November 2018 and reached a settlement. As part of the Allied Transaction, the Company assumed the remaining settlement liability. On July 15, 2020, the court granted final approval of the settlement, and the final settlement payment was made in April 2021. In addition to the above matters, we are from time to time party to various lawsuits, claims and other legal proceedings that arise in the ordinary course of our business. With respect to all such lawsuits, claims and proceedings, we record reserves when it is probable a liability has been incurred, and the amount of loss can be reasonably estimated. Although it is difficult to predict the ultimate outcome of these lawsuits, claims and proceedings, we do not believe that the ultimate disposition of any of these matters, individually or in the aggregate, would have a material adverse effect on our results of operations, financial position or cash flows. We maintain liability insurance for certain risks that is subject to certain self-insurance limits. We believe amounts previously recorded are sufficient to cover any liabilities arising from the proceedings with all outstanding legal claims. Except as reflected in such accruals, we are currently unable to estimate a range of reasonably possible loss or a range of reasonably possible loss in excess of the amount accrued for outstanding legal matters.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2021
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company had income tax expense of $203 and $608 for the three months ended September 30, 2021 and 2020, respectively, and $432 and $608 for the nine months ended September 30, 2021 and 2020, respectively, due to adjustments to the valuation allowance on deferred tax assets. The effective income tax rate for the three months ended September 30, 2021 was 23.7% without regard to the impact of the valuation allowance and includes the effect of state income taxes, nondeductible items and benefits for non-controlling interests. The Company’s income is subject to a federal statutory rate of 21.0% and an estimated state statutory rate of 5.1% before considering the valuation allowance. The Company evaluates its effective income tax rate at each interim period and adjusts it accordingly as facts and circumstances warrant. The determination of the annual estimated effective income tax rate at each interim period requires certain estimates and judgments including, but not limited to, the expected operating income for the year, estimated permanent differences between book and tax amounts, and the likelihood of recovering deferred tax assets generated in the current year. The accounting estimates used to compute the provision for income taxes may change as new events occur and additional information is obtained.

Loss Per Share

Loss Per Share	9 Months Ended
	Sep. 30, 2021
Earnings Per Share [Abstract]
Loss Per Share	Loss Per Share Basic loss per share is computed by dividing net loss attributable to the Company’s stockholders by the weighted-average number of shares outstanding during the period. Diluted loss per share reflects all potentially dilutive ordinary shares outstanding during the period and is computed by dividing net loss attributable to the Company’s stockholders by the weighted-average number of shares outstanding during the period increased by the number of additional shares that would have been outstanding as dilutive securities. Basic and diluted loss per share is determined using the following information: Three months ended Nine Months Ended September 30, September 30, 2021 2020 2021 2020 Numerator: Loss from continuing operations, net of tax and non-controlling interest $ (1,677) $ (4,335) $ (7,130) $ (28,941) Deemed and imputed dividends on Series A Preferred Stock (148) (147) (443) (314) Series A Preferred Stock dividends (1,946) (877) (6,161) (1,846) Net loss from continuing operations attributable to common stockholders (3,771) (5,359) (13,734) (31,101) Net income from discontinued operations — 119 — 6,939 Net loss attributable to common stockholders $ (3,771) $ (5,240) $ (13,734) $ (24,162) Denominator: Weighted average shares outstanding 32,277 29,986 30,955 29,853 Dilutive share-based awards — — — — Total weighted average shares outstanding, including dilutive shares 32,277 29,986 30,955 29,853 Net loss from continuing operations per common share Basic $ (0.12) $ (0.18) $ (0.44) $ (1.04) Diluted $ (0.12) $ (0.18) $ (0.44) $ (1.04) Net income from discontinued operations per common share Basic $ — $ 0.01 $ — $ 0.23 Diluted $ — $ 0.01 $ — $ 0.23 Net loss attributable to common stockholders per common share Basic $ (0.12) $ (0.17) $ (0.44) $ (0.81) Diluted $ (0.12) $ (0.17) $ (0.44) $ (0.81) The holders of the Preferred Stock have nonforfeitable rights to common stock dividends or common stock dividend equivalents. Accordingly, the Preferred Stock qualifies as participating securities. As a result of the net loss per share for the three and nine months ended September 30, 2021 and 2020, the inclusion of all potentially dilutive shares would be anti-dilutive. Therefore, dilutive shares of 12,379 and 11,430 were excluded from the computation of the weighted-average shares for diluted net loss per share for the three months ended September 30, 2021 and 2020, respectively, and dilutive shares of 12,064 and 8,453 were excluded from the computation of the weighted-average shares for diluted net loss per share for the nine months ended September 30, 2021 and 2020, respectively. A summary of securities excluded from the computation of diluted earnings per share is presented below: Three Months Ended Nine Months Ended September 30, September 30, 2021 2020 2021 2020 Diluted earnings per share: Anti-dilutive restricted and performance stock units 1,298 1,679 1,325 1,494 Anti-dilutive Series A Preferred Stock convertible into common stock 11,081 9,751 10,739 6,959 Potentially dilutive securities, excluded as anti-dilutive 12,379 11,430 12,064 8,453

Nature of Business and Basis _2

Nature of Business and Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis for Presentation The Company’s fiscal year ends December 31. The accompanying unaudited condensed consolidated financial statements include the assets, liabilities, stockholders’ equity and results of operations of the Company and its consolidated subsidiaries. Intercompany transactions and balances have been eliminated in consolidation. The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with rules and regulations of the Securities and Exchange Commission for quarterly reports on Form 10-Q. In the opinion of management, all adjustments considered necessary for a fair presentation have been included, which consist of normal recurring adjustments. Certain information and footnote disclosures normally included in the annual financial statements prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) have been condensed or omitted. The accompanying unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated and combined financial statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2020.
Discontinued Operations	Discontinued Operations On November 19, 2020, the Company sold its Allied Power Holdings LLC (“Allied”) subsidiary engaged in maintenance, modification and repair services to the nuclear and fossil power generation industry to an affiliate of Bernhard Capital Partners Management, LP (“BCP”), the Company’s majority shareholder, in an all-cash deal for $40,000 (the “Allied Transaction”), subject to adjustments for working capital and certain other adjustments as set forth in the purchase agreement (the “Purchase Agreement”).
Segment Information	Segment Information The Company had two reporting units, two operating segments and two reportable segments in 2019 and in 2020 through the date of the Allied Transaction, Environmental Solutions (“ES”) and Maintenance and Technical Services (“M&TS”). The Company determined that it had two reporting units because of the way the reporting units were managed. After the Allied Transaction, the Company realigned our segment reporting into a single operating segment to reflect the suite of end-to-end services we offer our utility partners and how our Chief Operating Decision Maker (“CODM”) reviews consolidated financial information to evaluate results of operations, assess performance and allocate resources. Due to the nature of the Company’s business, the Company's Chief Executive Officer, who is also the CODM, evaluates the performance of the Company and allocates resources of the Company based on consolidated gross profit, general and administrative expenses, balance sheet, liquidity, capital spending, safety statistics and business development reports for the Company as a whole. Since the Company has a single operating segment, all required financial segment information can be found in the consolidated financial statements. The prior period results in the accompanying unaudited condensed consolidated statements of operations were reclassified to conform to this presentation. We provide the following services through our one segment: remediation and compliance services, byproduct sales, fossil services and ERT services. Remediation and compliance services are associated with our customers’ need for multi-year environmental improvement and sustainability initiatives, whether driven by regulatory requirements, power generation customer initiatives or consumer expectations and standards. Byproduct sales support both our power generation customers’ desire to recycle their recurring and legacy volumes of coal combustion residuals (“CCRs”), commonly known as coal ash, and our ultimate end customers’ need for high-quality, cost-effective raw material substitutes. Fossil services consist of recurring and mission-critical coal ash management and operations for coal-fired power generation facilities. ERT services represent an innovative solution designed to meet the evolving and increasingly complex needs of utility customers. These customers need to retire and decommission older or underutilized assets while maximizing the asset's value and improving the environment. Our ERT services manage the sites' environmental remediation requirements, which benefits the communities and lowers the utility customers' cost.
Business Combinations	Business Combinations On March 30, 2018, Charah Management completed a transaction with SCB Materials International, Inc. and affiliated entities (“SCB”), a previously unrelated third party, pursuant to which Charah Solutions acquired certain assets and liabilities of SCB for a purchase price of $35,000, with $20,000 paid at closing and $15,000 to be paid over time in conjunction with certain performance metrics. The contract also contained various mechanisms for a working capital true-up. The acquisition was accounted for under the acquisition method of accounting in accordance with ASC Topic 805, Business Combinations with the allocation of the purchase price for the acquisition finalized as of March 31, 2019. The recognized goodwill from the transaction was allocated to the Environmental Solutions segment. In November 2018, the $15,000 contingent consideration to be paid over time was reduced by $3,300. During the year ended December 31, 2020, the Company evaluated the recoverability of certain grinding technology assets. As part of that review, we assessed the likelihood of paying the contingent liability based on achieving certain performance sales levels using these technology assets. In the fourth quarter of 2020, the Company concluded that certain sales levels would not be achieved, and we reduced the corresponding liability by $9,702, which was recognized as a component of operating income in the consolidated statements of operations. As of September 30, 2021, we do not expect the remaining liability balance of $1,950 to be paid within the next 12 months. The fair value of the contingent consideration was estimated using unobservable inputs of future cash flows, which we consider to be Level 3 measurements.
Fair Value Disclosure	Fair Value Disclosure The Company did not have any recurring or non-recurring level 3 fair value measurements as of September 30, 2021 and 2020 other than the value of certain remaining grinding technology related equipment upon impairment as described in Note 7, Balance Sheet Items , the measurement of the preferred stock paid-in-kind dividends as described in Note 13, Mezzanine Equity, and the application of stock-based compensation accounting as described in Note 17, Stock/Unit-Based Compensation
Recent Accounting Pronouncements	Recent Accounting Pronouncements Recently Adopted Accounting Pronouncements In August 2020, the FASB issued ASU No. 2020-06, Debt – Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging – Contracts in Entity’s Own Equity (Subtopic 815 – 40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity . This ASU simplifies the guidance on accounting for convertible debt instruments by removing the separation models for convertible debt with a cash conversion feature and convertible debt with a beneficial conversion feature. As a result, after adopting the ASU’s guidance, entities will not separately present in equity an embedded conversion feature in such debt. Instead, they will account for a convertible debt instrument wholly as debt and convertible preferred stock wholly as preferred stock unless certain other conditions are met. Also, the ASU requires the application of the if-converted method for calculating diluted earnings per share, and the treasury stock method will no longer be available. The Company early adopted ASU No. 2020-06, as permitted by the standard, as of January 1, 2021 with no significant impact on its consolidated financial statements. Recently Issued Accounting Pronouncements In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) , requiring all leases to be recognized on the balance sheet as a right-of-use asset and a lease liability, unless the lease is a short term lease (generally a lease with a term of 12 months or less). At the commencement date of the lease, the Company will recognize: (i) a lease liability for the Company’s obligation to make payments under the lease agreement, measured on a discounted basis; and (ii) a right-of-use asset that represents the Company’s right to use, or control the use of, the specified asset for the lease term. This ASU originally required recognition and measurement of leases at the beginning of the earliest period presented using a modified retrospective transition method. In July 2018, the FASB issued ASU No. 2018-11, which provided an additional (and optional) transition method that permits application of this ASU at the adoption date with recognition of a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. In June 2020, the FASB issued ASU No. 2020-05 and delayed the effective date of this ASU, extending the effective date for non-public business entities, and making the ASU effective for the Company for the fiscal year ending December 31, 2022, and interim periods within the fiscal year ending December 31, 2023, with early adoption permitted. The Company has not yet selected a transition method and is currently evaluating the effect that the adoption of this ASU will have on its consolidated financial statements. In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326) - Measurement of Credit Losses on Financial Instruments , which introduces a new model for recognizing credit losses on financial instruments based on an estimate of current expected credit losses. The new model will apply to: (1) loans, accounts receivable, trade receivables, and other financial assets measured at amortized cost, (2) loan commitments and certain other off-balance sheet credit exposures, (3) debt securities and other financial assets measured at fair value through other comprehensive income, and (4) beneficial interests in securitized financial assets. The amendments contained in this ASU will be applied through a modified retrospective approach through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is adopted. In November 2018, the FASB issued ASU No. 2018-19, which amended the effective date of ASU No. 2016-13 and clarified that receivables arising from operating leases are not within the scope of Subtopic 326-20. In October 2019, the FASB delayed the effective date of this ASU, extending the effective date for non-public business entities and making the ASU effective for the Company for the fiscal year ending December 31, 2023, and interim periods therein, with early adoption permitted. The Company is currently evaluating the effect that the adoption of this ASU will have on its consolidated financial statements. In March 2020, the FASB issued ASU No. 2020-04, Reference Rate Reform (Topic 848) Facilitation of the Effects of Reference Rate Reform on Financial Reporting . The ASU provides optional expedients and exceptions for applying GAAP to contract modifications and hedging relationships, subject to meeting certain criteria, that reference the London Inter-bank Offered Rate (“LIBOR”) or another rate that is expected to be discontinued. In January 2021, the FASB issued ASU No. 2021-01, Reference Rate Reform (Topic 848). This ASU provides supplemental guidance and clarification to ASU No. 2020-04, and these updates must be adopted concurrently, cumulatively referred to as “Topic 848.” The amendments in Topic 848 are currently effective for all entities, and upon adoption, may be applied prospectively to contract modifications made on or before December 31, 2022. The Company is still assessing the impact of Topic 848 on its consolidated financial statements.

Discontinued Operations (Tables

Discontinued Operations (Tables)	9 Months Ended
	Sep. 30, 2021
Discontinued Operations and Disposal Groups [Abstract]
Disposal Groups, Including Discontinued Operations	The following amounts related to discontinued operation were derived from historical financial information and have been segregated from continuing operations and reported as discontinued operations in our accompanying unaudited condensed consolidated statements of operations: Three Months Ended Nine Months Ended September 30, 2020 September 30, 2020 Revenue $ 55,599 $ 249,794 Cost of sales (51,890) (234,655) Gross profit 3,709 15,139 General and administrative expenses (2,810) (5,878) Operating income 899 9,261 Interest expense, net (a) (780) (2,322) Income from discontinued operations before income taxes 119 6,939 Income tax expense — — Income from discontinued operations $ 119 $ 6,939 (a) Interest expense was allocated to discontinued operations due to the requirement in Amendment No. 4 to Credit Agreement that cash generated from the Allied Transaction was required to be used to reduce our debt balances.
Schedule of Cash and Cash Equivalents	The following table provides supplemental cash, cash equivalent and restricted cash information related to discontinued operations: As of September 30, 2020 Cash and cash equivalents: Cash, cash equivalents and restricted cash - continuing operations $ 38,834 Cash, cash equivalents and restricted cash - discontinued operations 333 Total cash and cash equivalents $ 39,167
Depreciation and Amortization, Capital Expenditures and Significant Operating Noncash Items	The depreciation and amortization, capital expenditures and significant operating noncash items of Allied were as follows: Nine Months Ended September 30, 2020 Cash flows from discontinued operating activities: Depreciation and amortization $ 633 Loss on disposal of property and equipment 45 Non-cash shared-based compensation 283 Cash flows from discontinued investing activities: Purchase of property and equipment $ 95

Asset Acquisition (Tables)

Asset Acquisition (Tables)	9 Months Ended
	Sep. 30, 2021
Business Combination and Asset Acquisition [Abstract]
Asset Acquisition, Contingent Consideration	The assets acquired and liabilities assumed as recognized within the Company's condensed consolidated balance sheet upon closing on the APA consisted of the following: Consideration and direct transaction costs: Asset retirement obligations $ (50,590) Bond and insurance accrued expenses, net (2,229) Direct transaction costs (2,336) Total consideration and transaction costs incurred $ (55,155) Asset Received: Cash $ 6,354 Restricted cash 28,546 Water rights 5,196 Land 14,385 Plant, machinery and equipment 610 Vehicles 64 Total allocated value of assets acquired $ 55,155

Revenue (Tables)

Revenue (Tables)	9 Months Ended
	Sep. 30, 2021
Revenue from Contract with Customer [Abstract]
Schedule of Disaggregation of Revenue	We disaggregate our revenue from customers by type of service and by geographic region as we believe it best depicts how the nature, amount, timing and uncertainty of our revenue and cash flows are affected by economic factors. See details in the tables below. Three Months Ended Nine Months Ended September 30, September 30, 2021 2020 2021 2020 Byproduct sales $ 22,368 $ 22,940 $ 56,910 $ 66,101 Construction contracts 48,176 21,590 99,828 51,784 Services 13,617 18,586 43,048 48,812 Total revenue $ 84,161 $ 63,116 $ 199,786 $ 166,697 Three Months Ended Nine Months Ended September 30, September 30, 2021 2020 2021 2020 United States $ 84,161 $ 63,045 $ 199,786 $ 165,780 Foreign — 71 — 917 Total revenue $ 84,161 $ 63,116 $ 199,786 $ 166,697

Balance Sheet Items (Tables)

Balance Sheet Items (Tables)	9 Months Ended
	Sep. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Changes in the Allowance for Doubtful Accounts and Note Receivable	The following table presents the changes in the allowance for doubtful accounts: Three Months Ended Nine Months Ended September 30, September 30, 2021 2020 2021 2020 Balance, beginning of period $ 558 $ 249 $ 467 $ 146 Add: provision — 5 139 124 Less: deduction and other adjustments (53) (2) (101) (18) Balance, end of period $ 505 $ 252 $ 505 $ 252 The following table reflects the classification of the note receivable within our accompanying unaudited condensed consolidated balance sheet: September 30, 2021 Note receivable $ 1,602 Less: current portion in prepaid expenses and other current assets (500) Non-current portion in other assets $ 1,102
Schedule of Property and Equipment, Net	The following table shows the components of property and equipment, net: September 30, 2021 December 31, 2020 Plant, machinery and equipment $ 64,612 $ 68,308 Structural fill site improvements 55,760 55,760 Vehicles 11,863 12,824 Office equipment 600 582 Buildings and leasehold improvements 267 262 Land, land improvements and structural fill sites 15,439 432 Capital lease assets 18,644 6,627 Construction in progress 764 1,961 Total property and equipment $ 167,949 $ 146,756 Less: accumulated depreciation (103,562) (97,286) Property and equipment, net $ 64,387 $ 49,470
Schedule Of Bargain Purchase Liability	The following table reflects activity related to the bargain purchase liability: Three Months Ended Nine Months Ended September 30, September 30, 2021 2020 2021 2020 Balance, beginning of period $ — $ 7,110 $ — $ 7,110 Amortization expense: provision — (7,110) — (7,110) Balance, end of period $ — $ — $ — $ —
Schedule of Capital Leased Assets	The following table shows the components of capital lease assets, net: September 30, 2021 December 31, 2020 Capital lease assets $ 18,644 $ 6,627 Less: accumulated depreciation (2,374) (368) Capital lease assets, net $ 16,270 $ 6,259
Schedule of Lease Receivable	The following table reflects the classification of the lease receivable within our accompanying unaudited condensed consolidated balance sheet: September 30, 2021 Lease receivable $ 5,953 Less: current portion in prepaid expenses and other current assets (64) Non-current portion in other assets $ 5,889
Schedule of Accrued Liabilities	The following table shows the components of accrued liabilities: September 30, 2021 December 31, 2020 Accrued expenses $ 16,602 $ 19,323 Accrued working capital adjustment for the Allied Transaction — 6,954 Accrued payroll and bonuses 2,028 7,227 Accrued preferred stock dividends 1,946 1,356 Accrued interest 1,147 77 Accrued liabilities $ 21,723 $ 34,937
Schedule of Asset Retirement Obligations	The following table reflects the activity for the asset retirement obligations: Three Months Ended Nine Months Ended September 30, September 30, 2021 2020 2021 2020 Balance, beginning of period 52,361 $ 10,948 $ 5,159 $ 15,131 Liabilities acquired (See Note 5) — — 50,590 — Liabilities settled (1,805) (2,009) (5,980) (6,542) Gain on ARO settlement (1,127) — (1,127) — Change in estimated cash flows — (2,127) — (2,127) Accretion 538 135 1,325 485 Balance, end of period 49,967 6,947 49,967 6,947 Less: current portion (32,181) (2,921) (32,181) (2,921) Non-current portion 17,786 $ 4,026 $ 17,786 $ 4,026

Equity Method Investment (Table

Equity Method Investment (Tables)	9 Months Ended
	Sep. 30, 2021
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investments	Summarized balance sheet information of our equity method investment entity is as follows: September 30, 2021 December 31, 2020 Current assets $ 14 $ 1,812 Noncurrent assets — 282 Total assets $ 14 $ 2,094 Current liabilities — 432 Equity of Charah 7 831 Equity of joint venture partner 7 831 Total liabilities and members’ equity $ 14 $ 2,094 Summarized financial performance of our equity method investment entity is as follows: Three Months Ended Nine Months Ended September 30, September 30, 2021 2020 2021 2020 Revenue $ — $ 2,353 $ 555 $ 5,377 Net (loss) income — 1,252 382 2,495 Charah Solutions’ share of net (loss) income — 625 191 1,247 The following table reflects our proportional ownership activity in our investment account: Three Months Ended Nine Months Ended September 30, September 30, 2021 2020 2021 2020 Opening balance $ 7 $ 4,851 $ 831 $ 5,078 Distributions — (381) (1,015) (1,230) Share of net (loss) income — 625 191 1,247 Closing balance $ 7 $ 5,095 $ 7 $ 5,095

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill and Intangible Assets	The Company’s intangible assets consist of the following: September 30, 2021 December 31, 2020 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Definite-lived intangibles Customer relationships $ 78,942 $ (36,753) $ 42,189 $ 78,942 $ (30,832) $ 48,110 Indefinite-lived intangibles Charah trade name 13,316 13,316 Water rights 5,196 — Total 18,512 13,316 Total $ 60,701 $ 61,426

Notes Payable (Tables)

Notes Payable (Tables)	9 Months Ended
	Sep. 30, 2021
Debt Disclosure [Abstract]
Schedule of Debt	The following table summarizes the major components of debt at each balance sheet date and provides maturities and interest rate ranges for each major category as of September 30, 2021 and December 31, 2020: September 30, 2021 December 31, 2020 Various equipment notes entered into in November 2017, payable in monthly installments ranging from $6 to $24, including interest at 5.2%, maturing in December 2022 through December 2023. The notes are secured by equipment with a net book value of $1,277 as of September 30, 2021. $ 2,034 $ 2,871 Various equipment notes entered into in 2018, payable in monthly installments ranging from $1 to $39, including interest ranging from 5.6% to 6.8%, maturing in March 2023 through May 2025. The notes are secured by equipment with a net book value of $5,960 as of September 30, 2021. 6,465 8,446 Various equipment notes entered into in 2019, payable in monthly installments ranging from $2 to $23, including interest ranging from 3.9% to 6.4%, maturing in April 2024 through December 2024. The notes are secured by equipment with a net book value of $2,748 as of September 30, 2021. 2,847 3,490 Various equipment notes entered into in 2020, payable in monthly installments ranging from $9 to $10, including interest of 5.4%, maturing in August 2025. The notes are secured by equipment with a net book value of $1,882 as of September 30, 2021. 1,723 2,011 Various equipment notes entered into in 2021, payable in monthly installments ranging from $3 to $9, including interest ranging from 4.0% to 6.5%, maturing in February 2026 through August 2026. The notes are secured by equipment with a net book value of $1,789 as of September 30, 2021. 1,953 — Various commercial insurance premium financing agreements entered into in 2020, payable in monthly installments ranging from $22 to $126, including interest ranging from 3.4% to 3.8%, that matured in February and March 2021. — 453 Various commercial insurance premium financing agreements entered into in 2021, payable in monthly installments ranging from $24 to $117, including interest ranging from 3.0% to 3.9%, maturing in October 2021 through April 2022. 837 — A $10,000 equipment line with a bank, entered into in December 2017, secured by all equipment purchased with the proceeds of the loan. Interest is calculated on any outstanding amounts using a fixed rate of 4.5%. The equipment line converted to a term loan in September 2018 with a maturity date of June 22, 2023. The term loan is secured by equipment with a net book value of $2,700 as of September 30, 2021. 4,123 5,791 The Closing Date Term Loan and the Delayed Draw Term Loan entered into in September 2018 as part of the Syndicated Credit Facility (see Note 11). In August 2021, the Credit Facility was terminated and the full outstanding principal balance was repaid. — 125,239 The Notes entered into in August 2021 (see Note 11). The Notes are senior unsecured obligations of the Company and rank equal in right of payment with the Company’s existing and future senior unsecured indebtedness. 135,000 — The Promissory Note entered into in August 2021 as part of the Letter of Credit Cash Collateralization Promissory Note (see Note 11). The loan evidenced by the Promissory Note is secured by a pledge of substantially all of the assets of Charah, LLC, subject to certain customary exceptions and limitations. 17,852 — Total 172,834 148,301 Less debt issuance costs, net (11,728) (1,024) 161,106 147,277 Less current maturities (25,533) (22,308) Notes payable due after one year $ 135,573 $ 124,969

Contract Assets and Liabiliti_2

Contract Assets and Liabilities (Tables)	9 Months Ended
	Sep. 30, 2021
Revenue from Contract with Customer [Abstract]
Schedule of Asset and Liabilities	Our contract assets are as follows: September 30, 2021 December 31, 2020 Costs and estimated earnings in excess of billings $ 15,395 $ 12,196 Retainage 8,116 6,133 Total contract assets $ 23,511 $ 18,329 Our contract liabilities are as follows: September 30, 2021 December 31, 2020 Billings in excess of costs and estimated earnings $ 12,447 $ 6,167 Deferred revenue 1,698 128 Total contract liabilities $ 14,145 $ 6,295
Costs in Excess of Billings and Billings in Excess of Costs	The Company's net position on uncompleted contracts is as follows: September 30, 2021 December 31, 2020 Costs incurred on uncompleted contracts $ 169,576 $ 123,339 Estimated earnings 19,019 18,425 Total costs and estimated earnings 188,595 141,764 Less billings to date (185,647) (135,735) Net balance in process $ 2,948 $ 6,029 The net balance in process classified on the accompanying unaudited condensed consolidated balance sheets is as follows: September 30, 2021 December 31, 2020 Costs and estimated earnings in excess of billings $ 15,395 $ 12,196 Billings in excess of costs and estimated earnings (12,447) (6,167) Net balance in process $ 2,948 $ 6,029

Stock_Unit Based Compensation (

Stock/Unit Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2021
Share-based Payment Arrangement [Abstract]
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity	A summary of the Company’s non-vested share activity for the nine months ended September 30, 2021 is as follows: Restricted Stock Performance Stock Total Shares Weighted-Average Grant Date Fair Value Shares Weighted-Average Grant Date Fair Value Shares Weighted-Average Grant Date Fair Value Balance as of December 31, 2020 981 $ 5.08 453 $ 4.02 1,434 $ 4.74 Granted 501 5.41 235 4.74 736 5.20 Forfeited (62) 7.54 (40) 4.76 (102) 6.45 Vested (535) 5.88 — — (535) 5.88 Balance as of September 30, 2021 885 $ 4.62 648 $ 4.24 1,533 $ 4.46 Restricted Stock Performance Stock Total Weighted Average Remaining Contractual Terms (Years) Aggregate Intrinsic Value Weighted Average Remaining Contractual Terms (Years) Aggregate Intrinsic Value Weighted Average Remaining Contractual Terms (Years) Aggregate Intrinsic Value Balance as of December 31, 2020 0.79 $ 2,817 1.68 $ 1,299 1.07 $ 4,116 Balance as of September 30, 2021 1.13 $ 4,072 1.51 $ 2,979 1.29 $ 7,051

Loss Per Share (Tables)

Loss Per Share (Tables)	9 Months Ended
	Sep. 30, 2021
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	Basic and diluted loss per share is determined using the following information: Three months ended Nine Months Ended September 30, September 30, 2021 2020 2021 2020 Numerator: Loss from continuing operations, net of tax and non-controlling interest $ (1,677) $ (4,335) $ (7,130) $ (28,941) Deemed and imputed dividends on Series A Preferred Stock (148) (147) (443) (314) Series A Preferred Stock dividends (1,946) (877) (6,161) (1,846) Net loss from continuing operations attributable to common stockholders (3,771) (5,359) (13,734) (31,101) Net income from discontinued operations — 119 — 6,939 Net loss attributable to common stockholders $ (3,771) $ (5,240) $ (13,734) $ (24,162) Denominator: Weighted average shares outstanding 32,277 29,986 30,955 29,853 Dilutive share-based awards — — — — Total weighted average shares outstanding, including dilutive shares 32,277 29,986 30,955 29,853 Net loss from continuing operations per common share Basic $ (0.12) $ (0.18) $ (0.44) $ (1.04) Diluted $ (0.12) $ (0.18) $ (0.44) $ (1.04) Net income from discontinued operations per common share Basic $ — $ 0.01 $ — $ 0.23 Diluted $ — $ 0.01 $ — $ 0.23 Net loss attributable to common stockholders per common share Basic $ (0.12) $ (0.17) $ (0.44) $ (0.81) Diluted $ (0.12) $ (0.17) $ (0.44) $ (0.81)
Schedule of Antidilutive Securities Excluded from Computation	A summary of securities excluded from the computation of diluted earnings per share is presented below: Three Months Ended Nine Months Ended September 30, September 30, 2021 2020 2021 2020 Diluted earnings per share: Anti-dilutive restricted and performance stock units 1,298 1,679 1,325 1,494 Anti-dilutive Series A Preferred Stock convertible into common stock 11,081 9,751 10,739 6,959 Potentially dilutive securities, excluded as anti-dilutive 12,379 11,430 12,064 8,453

Nature of Business and Basis _3

Nature of Business and Basis of Presentation (Details) $ in Thousands	Aug. 25, 2021USD ($)	Mar. 30, 2018USD ($)	Nov. 30, 2018USD ($)	Dec. 31, 2020USD ($)	Jun. 30, 2021USD ($)	Sep. 30, 2021USD ($)segment	Sep. 30, 2020USD ($)	Nov. 18, 2020segment	Dec. 31, 2019segment	Nov. 19, 2020USD ($)
Related Party Transaction [Line Items]
Proceeds from long-term debt						$ 156,301	$ 18,353
Number of reporting units | segment								2	2
Number of operating segments | segment						1		2	2
Number of reportable segments | segment								2	2
Reduction in purchase price to be paid over time				$ 9,702
Contingent payments for acquisitions				$ 1,950		$ 1,950
SBC Materials International, Inc.
Related Party Transaction [Line Items]
Purchase price		$ 35
Payment at closing		20
Additional payment to be paid based on certain performance metrics		$ 15	$ 15
Reduction in purchase price to be paid over time			$ 3,300
Discontinued Operations, Disposed of by Sale | Allied Transaction And The Reporting Units
Related Party Transaction [Line Items]
Discontinued operation, consideration										$ 40,000
Private Placement
Related Party Transaction [Line Items]
Proceeds from private placement					$ 13,000
Syndicated Credit Facility | Line of Credit
Related Party Transaction [Line Items]
Debt instrument					$ 132,788
8.50% Senior Notes Due 2026 | Senior Notes
Related Party Transaction [Line Items]
Debt instrument	$ 135,000
Proceeds from long-term debt	$ 135,000
Interest rate	8.50%

Impact of the COVID-19 Pandem_2

Impact of the COVID-19 Pandemic (Details) - COVID-19 - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Unusual or Infrequent Item, or Both [Line Items]
Payroll taxes due 2020			$ 1,637
Forecast
Unusual or Infrequent Item, or Both [Line Items]
Accrued payroll, percentage of deferred payment	50.00%
Subsequent Event
Unusual or Infrequent Item, or Both [Line Items]
Accrued payroll, percentage of deferred payment		50.00%

Discontinued Operations - Narra

Discontinued Operations - Narratives (Details) - USD ($) $ in Thousands	Nov. 19, 2020	Sep. 30, 2021	Sep. 30, 2021	Dec. 31, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Recognized credit cost of sales		$ 0	$ 60
Discontinued Operations, Disposed of by Sale | Allied Transaction
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration	$ 40,000
Contribution from sale of subsidiary to entity under common control	$ 25,506
Accounts receivable outstanding		$ 23	23	$ 120
Proceeds from the sale of subsidiary, net of subsidiary cash				37,860
Discontinued operation transaction costs				1,900
Restricted cash				240
Liabilities assumed			3,500	3,500
Adjustments to additional paid in capital other				301
Accrued on working capital adjustments				6,954
Other transaction costs			413	$ 413
Working capital adjustment payment			$ 6,954

Discontinued Operations - Conti

Discontinued Operations - Continuing Operations and Discontinued Operations in Our Consolidated & Combined Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from discontinued operations	$ 0	$ 119	$ 0	$ 6,939
Discontinued Operations, Disposed of by Sale | Allied Transaction And The Reporting Units
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue		55,599		249,794
Cost of sales		(51,890)		(234,655)
Gross profit		3,709		15,139
General and administrative expenses		(2,810)		(5,878)
Operating income		899		9,261
Interest expense, net		(780)		(2,322)
Income from discontinued operations before income taxes		119		6,939
Income tax expense		0		0
Income from discontinued operations		$ 119		$ 6,939

Discontinued Operations - Suppl

Discontinued Operations - Supplemental Cash, Cash Equivalent and Restricted Cash Information Related to Discontinued Operations (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Dec. 31, 2019
Discontinued Operations and Disposal Groups [Abstract]
Cash, cash equivalents and restricted cash - continuing operations			$ 38,834
Cash, cash equivalents and restricted cash - discontinued operations			333
Total cash and cash equivalents	$ 71,053	$ 29,211	$ 39,167	$ 6,128

Discontinued Operations - Depre

Discontinued Operations - Depreciation and Amortization, Capital Expenditures and Significant Operating Noncash Items (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Cash flows from discontinued operating activities:
Loss on disposal of property and equipment	$ 2,998	$ 0	$ 6,241	$ 0
Non-cash shared-based compensation			$ 1,767	2,084
Discontinued Operations, Disposed of by Sale | Allied Transaction And The Reporting Units
Cash flows from discontinued operating activities:
Depreciation and amortization				633
Loss on disposal of property and equipment				45
Non-cash shared-based compensation				283
Cash flows from discontinued investing activities:
Purchase of property and equipment				$ 95

Asset Acquisition - Narrative (

Asset Acquisition - Narrative (Details) $ in Thousands	1 Months Ended	9 Months Ended
	Feb. 28, 2021a	Sep. 30, 2021USD ($)
Schedule of Asset Acquisition [Line Items]
Property redevelopment term	34 months
Structural fill site costs, inflation rate	3.00%
Asset retirement obligation, weighted average rate	4.50%
Sale Of Plant, Machinery And Equipment And Vehicles
Schedule of Asset Acquisition [Line Items]
Purchases from third party | $		$ 193
Texas Municipal Power Agency
Schedule of Asset Acquisition [Line Items]
Area of land	6,166
Gibbons Creek Steam Electric Station And Reservoir
Schedule of Asset Acquisition [Line Items]
Area of land	3,500

Asset Acquisition - Assets acqu

Asset Acquisition - Assets acquired and liabilities assumed (Details) - USD ($) $ in Thousands	Feb. 28, 2021	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019
Consideration and direct transaction costs:
Asset retirement obligations		$ (49,967)	$ (52,361)	$ (5,159)	$ (6,947)	$ (10,948)	$ (15,131)
Asset Purchase Agreement
Consideration and direct transaction costs:
Asset retirement obligations	$ (50,590)
Bond and insurance accrued expenses, net	(2,229)
Direct transaction costs	(2,336)
Total consideration and transaction costs incurred	(55,155)
Asset Received:
Cash	6,354
Restricted cash	28,546
Water rights	5,196
Land	14,385
Plant, machinery and equipment	610
Vehicles	64
Total allocated value of assets acquired	$ 55,155

Revenue - Schedule of Disaggreg

Revenue - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Total revenue	$ 84,161	$ 63,116	$ 199,786	$ 166,697
United States
Disaggregation of Revenue [Line Items]
Total revenue	84,161	63,045	199,786	165,780
Foreign
Disaggregation of Revenue [Line Items]
Total revenue	0	71	0	917
Byproduct sales
Disaggregation of Revenue [Line Items]
Total revenue	22,368	22,940	56,910	66,101
Construction contracts
Disaggregation of Revenue [Line Items]
Total revenue	48,176	21,590	99,828	51,784
Services
Disaggregation of Revenue [Line Items]
Total revenue	$ 13,617	$ 18,586	$ 43,048	$ 48,812

Revenue - Performance Obligatio

Revenue - Performance Obligations (Details) $ in Thousands	Sep. 30, 2021USD ($)
Revenue from Contract with Customer [Abstract]
Revenue, remaining performance obligation, amount	$ 491,066
Unapproved change orders	4,837
Approved change orders	$ 1,732
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-10-01
Revenue from Contract with Customer [Abstract]
Expected timing of satisfaction, period	3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, percentage	13.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue from Contract with Customer [Abstract]
Expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, percentage	15.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue from Contract with Customer [Abstract]
Expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, percentage	10.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue from Contract with Customer [Abstract]
Expected timing of satisfaction, period
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, percentage	62.00%

Balance Sheet Items - Allowance

Balance Sheet Items - Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Accounts Receivable Allowance For Doubtful Accounts [Roll Forward]
Balance, beginning of period	$ 558	$ 249	$ 467	$ 146
Add: provision	0	5	139	124
Less: deduction and other adjustments	(53)	(2)	(101)	(18)
Balance, end of period	$ 505	$ 252	$ 505	$ 252

Balance Sheet Items - Schedule

Balance Sheet Items - Schedule of Property and Equipment, Net (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 167,949	$ 146,756
Less: accumulated depreciation	(103,562)	(97,286)
Property and equipment, net	64,387	49,470
Plant, machinery and equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	64,612	68,308
Structural fill site improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	55,760	55,760
Vehicles
Property, Plant and Equipment [Line Items]
Total property and equipment	11,863	12,824
Office equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	600	582
Buildings and leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	267	262
Land, land improvements and structural fill sites
Property, Plant and Equipment [Line Items]
Total property and equipment	15,439	432
Capital lease assets
Property, Plant and Equipment [Line Items]
Total property and equipment	18,644	6,627
Construction in progress
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 764	$ 1,961

Balance Sheet Items - Narrative

Balance Sheet Items - Narrative (Details) $ in Thousands	1 Months Ended		3 Months Ended		9 Months Ended
	Jun. 30, 2021USD ($)	Mar. 31, 2021	Sep. 30, 2021USD ($)sitetract_of_real_property	Sep. 30, 2020USD ($)	Sep. 30, 2021USD ($)sitetract_of_real_property	Sep. 30, 2020USD ($)	Dec. 31, 2020USD ($)	Jun. 30, 2020USD ($)	Dec. 31, 2019USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Land improvements			$ 5,158		$ 5,158
Demolition cost capitalized			1,365		2,395
Cost basis on scrap sold			1,003		1,342
Depreciation			4,289	$ 4,594	12,657	$ 13,306
Impairment of long-lived assets			673		673
Long-lived assets impaired, fair value			148		148
Impairment expense			$ 700	6,399	$ 827	6,399
Sale leaseback transaction, terms		30 years
Discount rate			3.90%		3.90%
Gain on sales-type lease					$ 5,568	0
Non-current assets held for sale	$ 2,852
Proceeds from sale of assets	$ 1,250
Asset sale agreement, final payment to be received, term	36 months
Gain on disposition of fixed asset					$ 1,187
Number of structural sites owned and operated | site			1		1
Number of tracts of real property | tract_of_real_property			4		4
Asset retirement obligation	$ 52,361		$ 49,967	6,947	$ 49,967	6,947	$ 5,159	$ 10,948	$ 15,131
Gain on ARO settlement			1,127	0	1,127	0
Change in estimated cash flows			$ 0	(2,127)	$ 0	(2,127)
Asset retirement obligation, period decrease				279		279
Costs incurred, asset retirement obligation incurred				$ 1,848		$ 1,848

Balance Sheet Items - Purchase

Balance Sheet Items - Purchase Option Liability (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Purchase Option Liability [Roll Forward]
Balance, beginning of period	$ 0	$ 7,110	$ 0	$ 7,110
Amortization expense: provision	0	(7,110)	0	(7,110)
Balance, end of period	$ 0	$ 0	$ 0	$ 0
BCP | Charah Management LLC
Noncontrolling Interest [Line Items]
Equity interest percentage acquired		76.00%		76.00%

Balance Sheet Items - Capital L

Balance Sheet Items - Capital Lease Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Capital lease assets	$ 18,644	$ 6,627
Less: accumulated depreciation	(2,374)	(368)
Capital lease assets, net	$ 16,270	$ 6,259

Balance Sheet Items - Lease Rec

Balance Sheet Items - Lease Receivable (Details) $ in Thousands	Sep. 30, 2021USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Lease receivable	$ 5,953
Less: current portion in prepaid expenses and other current assets	(64)
Non-current portion in other assets	$ 5,889

Balance Sheet Items - Note Rece

Balance Sheet Items - Note Receivable (Details) - Notes Receivable $ in Thousands	Sep. 30, 2021USD ($)
Related Party Transaction [Line Items]
Note receivable	$ 1,602
Less: current portion in prepaid expenses and other current assets	(500)
Non-current portion in other assets	$ 1,102

Balance Sheet Items - Accrued L

Balance Sheet Items - Accrued Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accrued expenses	$ 16,602	$ 19,323
Accrued working capital adjustment for the Allied Transaction	0	6,954
Accrued payroll and bonuses	2,028	7,227
Accrued preferred stock dividends	1,946	1,356	$ 877
Accrued interest	1,147	77
Accrued liabilities	$ 21,723	$ 34,937

Balance Sheet Items - Asset Ret

Balance Sheet Items - Asset Retirement Obligation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Balance, beginning of period	$ 52,361	$ 10,948	$ 5,159	$ 15,131
Liabilities acquired	0	0	50,590	0
Liabilities settled	(1,805)	(2,009)	(5,980)	(6,542)
Gain on ARO settlement	(1,127)	0	(1,127)	0
Change in estimated cash flows	0	(2,127)	0	(2,127)
Accretion	538	135	1,325	485
Balance, end of period	49,967	6,947	49,967	6,947
Less: current portion	(32,181)	(2,921)	(32,181)	(2,921)	$ (2,043)
Non-current portion	$ 17,786	$ 4,026	$ 17,786	$ 4,026	$ 3,116

Equity Method Investment - Narr

Equity Method Investment - Narrative (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Equity Method Investments and Joint Ventures [Abstract]
Receivable due from equity method investment	$ 2	$ 182

Equity Method Investment - Summ

Equity Method Investment - Summarized Financial Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020	Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]
Current assets	$ 151,791		$ 151,791			$ 105,795
Total assets	347,523		347,523			280,960
Current liabilities	124,842		124,842			84,330
Total liabilities and members’ equity	20,702	$ 31,202	20,702	$ 31,202	$ 10,748	20,316	$ 35,462	$ 53,273
Net (loss) income	(1,721)	(3,523)	(7,100)	(20,822)
Charah Solutions’ share of net (loss) income	0	625	191	1,247
Equity method investments
Schedule of Equity Method Investments [Line Items]
Current assets	14		14			1,812
Noncurrent assets	0		0			282
Total assets	14		14			2,094
Current liabilities	0		0			432
Total liabilities and members’ equity	14		14			2,094
Revenue	0	2,353	555	5,377
Net (loss) income	0	1,252	382	2,495
Charah Solutions’ share of net (loss) income	0	$ 625	191	$ 1,247
Equity method investments | Equity of Charah
Schedule of Equity Method Investments [Line Items]
Total liabilities and members’ equity	7		7			831
Equity method investments | Equity of joint venture partner
Schedule of Equity Method Investments [Line Items]
Total liabilities and members’ equity	$ 7		$ 7			$ 831

Equity Method Investment - Owne

Equity Method Investment - Ownership (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Equity Method Investment, Proportional Ownership Activity [Roll Forward]
Opening balance	$ 7	$ 4,851	$ 831	$ 5,078
Distributions	0		(1,015)	0
Distributions		(381)	0	(1,230)
Share of net (loss) income	0	625	191	1,247
Closing balance	$ 7	$ 5,095	$ 7	$ 5,095

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($)	1 Months Ended	3 Months Ended		9 Months Ended
	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Aug. 25, 2021	Dec. 31, 2020
Related Party Transaction [Line Items]
Receivable from related parties		$ 2,000		$ 2,000			$ 182,000
Issuance of Series A Preferred Stock, net of issuance costs (in shares)					26,000
Amendment No. 3 to Credit Agreement | Series A Preferred Stock
Related Party Transaction [Line Items]
Issuance of Series A Preferred Stock, net of issuance costs (in shares)	26,000			26,000
8.50% Senior Notes Due 2026 | Senior Notes
Related Party Transaction [Line Items]
Debt instrument						$ 135,000,000
Interest rate						8.50%
Additional purchase amount						$ 5,000,000
Affiliated Entity | ATC Group Services, LLC | Environmental Consulting and Engineering Services
Related Party Transaction [Line Items]
Expenses from transactions with related party		4,000	$ 111,000	$ 83,000	$ 205,000
Receivable from related parties		0		0			0
Payable to related parties		4,000		4,000			$ 29,000
B. Riley | 8.50% Senior Notes Due 2026 | Senior Notes
Related Party Transaction [Line Items]
Debt instrument						$ 80,325,000
Payments of debt issuance costs		$ 7,914,000		$ 7,914,000

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible asset, useful life			10 years
Amortization of intangible assets	$ 1,974	$ 2,215	$ 5,921	$ 6,367

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets - Summary of Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Acquired Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangibles	$ 18,512	$ 13,316
Intangible assets, net	60,701	61,426
Charah trade name
Acquired Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangibles	13,316	13,316
Water rights
Acquired Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangibles	5,196	0
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	78,942	78,942
Accumulated Amortization	(36,753)	(30,832)
Net Carrying Amount	$ 42,189	$ 48,110

Long-term Debt (Details)

Long-term Debt (Details)	Nov. 09, 2021USD ($)trading_day	Aug. 25, 2021USD ($)	Sep. 30, 2021USD ($)	Sep. 30, 2021USD ($)	Sep. 30, 2020USD ($)	Jun. 30, 2021USD ($)	Dec. 31, 2020USD ($)	Sep. 21, 2018USD ($)
Debt Instrument [Line Items]
Proceeds from long-term debt				$ 156,301,000	$ 18,353,000
Debt issuance costs			$ 11,728,000	11,728,000			$ 1,024,000
Write off of deferred issuance cost			638,000	638,000
Charah, LLC
Debt Instrument [Line Items]
Letters of credit outstanding			17,459,000	$ 17,459,000			$ 11,079,000
Secured Debt | Charah, LLC
Debt Instrument [Line Items]
Interest rate		8.00%
8.50% Senior Notes Due 2026 | Senior Notes
Debt Instrument [Line Items]
Debt instrument		$ 135,000,000
Debt instrument, redemption price, percentage		100.00%
Proceeds from long-term debt		$ 135,000,000
Interest rate		8.50%
Percentage of principal amount, minimum		25.00%
Debt issuance costs		$ 11,932,000
8.50% Senior Notes Due 2026 | Senior Notes | Charah, LLC
Debt Instrument [Line Items]
Debt instrument		$ 17,852,000
Debt instrument, term		13 months
8.50% Senior Notes Due 2026 | Senior Notes | Period 1
Debt Instrument [Line Items]
Debt instrument, redemption price, percentage		103.00%
8.50% Senior Notes Due 2026 | Senior Notes | Period 2
Debt Instrument [Line Items]
Debt instrument, redemption price, percentage		102.00%
8.50% Senior Notes Due 2026 | Senior Notes | Period 3
Debt Instrument [Line Items]
Debt instrument, redemption price, percentage		100.00%
8.50% Senior Notes Due 2026, Additional Borrowings | Senior Notes
Debt Instrument [Line Items]
Debt instrument		$ 5,000,000
Credit Agreement | Adjusted LIBO Rate | Subsequent Event
Debt Instrument [Line Items]
Basis spread	2.25%
Additional basis spread on basis spread	1.25%
Credit Agreement | Fed Funds Effective Rate Overnight Index Swap Rate | Subsequent Event
Debt Instrument [Line Items]
Basis spread	0.50%
Credit Agreement | One Month Adjusted LIBO Rate | Subsequent Event
Debt Instrument [Line Items]
Basis spread	1.00%
Credit Agreement | Line of Credit | Revolving Credit Facility | Subsequent Event
Debt Instrument [Line Items]
Long-term debt, term	4 years
Maximum borrowing capacity	$ 30,000,000
Accordion feature, higher borrowing capacity option	5,000,000
Maximum availability	1,000,000
PP&E component	$ 7,500,000
Percentage of Lesser of the aggregate revolving commitments and the borrowing base	0.125
Line of credit facility, consecutive business days, maximum borrowing capacity	$ 3,500,000
Line of credit facility, consecutive business day | trading_day	3
Line of credit facility, threshold consecutive months | trading_day	12
Line of credit facility, fixed charge coverage ratio	1
Credit Agreement | Line of Credit | Bridge Loan | Subsequent Event
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 5,000,000
Credit Agreement | Line of Credit | Letter of Credit | Subsequent Event
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 5,000,000
Syndicated Credit Facility | Line of Credit
Debt Instrument [Line Items]
Debt instrument						$ 132,788,000
Repayments of debt			114,123,000
Payment of debt accrued fees			2,000
Syndicated Credit Facility | Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity								$ 50,000,000
Repayments of debt			$ 12,340,000
Syndicated Credit Facility | Line of Credit | Term Loan
Debt Instrument [Line Items]
Maximum borrowing capacity								205,000,000
Syndicated Credit Facility | Line of Credit | Loan Commitment
Debt Instrument [Line Items]
Accordion feature, higher borrowing capacity option								$ 25,000,000

Notes Payable - Schedule of Deb

Notes Payable - Schedule of Debt (Details) - USD ($)	Sep. 30, 2021	Aug. 25, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Total	$ 172,834,000		$ 148,301,000
Less debt issuance costs, net	(11,728,000)		(1,024,000)
Long-term debt	161,106,000		147,277,000
Less current maturities	(25,533,000)		(22,308,000)
Notes payable due after one year	135,573,000		124,969,000
Secured Promissory Note | Charah, LLC
Debt Instrument [Line Items]
Total	17,852,000		0
Notes Payable | Equipment Notes Payable, 5.2% Due December 2022 and 2023
Debt Instrument [Line Items]
Total	$ 2,034,000		2,871,000
Interest rate	5.20%
Equipment net book value	$ 1,277,000
Notes Payable | Equipment Notes Payable, 5.2% Due December 2022 and 2023 | Minimum
Debt Instrument [Line Items]
Monthly installments	6,000
Notes Payable | Equipment Notes Payable, 5.2% Due December 2022 and 2023 | Maximum
Debt Instrument [Line Items]
Monthly installments	24,000
Notes Payable | Equipment Notes Payable, 5.6% to 6.8% Due March 2023 Through May 2025
Debt Instrument [Line Items]
Total	6,465,000		8,446,000
Equipment net book value	5,960,000
Notes Payable | Equipment Notes Payable, 5.6% to 6.8% Due March 2023 Through May 2025 | Minimum
Debt Instrument [Line Items]
Monthly installments	$ 1,000
Interest rate	5.60%
Notes Payable | Equipment Notes Payable, 5.6% to 6.8% Due March 2023 Through May 2025 | Maximum
Debt Instrument [Line Items]
Monthly installments	$ 39,000
Interest rate	6.80%
Notes Payable | Equipment Notes Payable, 3.9% to 6.4% Due April 2024 Through December 2024
Debt Instrument [Line Items]
Total	$ 2,847,000		3,490,000
Equipment net book value	2,748,000
Notes Payable | Equipment Notes Payable, 3.9% to 6.4% Due April 2024 Through December 2024 | Minimum
Debt Instrument [Line Items]
Monthly installments	$ 2,000
Interest rate	3.90%
Notes Payable | Equipment Notes Payable, 3.9% to 6.4% Due April 2024 Through December 2024 | Maximum
Debt Instrument [Line Items]
Monthly installments	$ 23,000
Interest rate	6.40%
Notes Payable | Equipment Notes Payable, 5.4 % Due August 2025
Debt Instrument [Line Items]
Total	$ 1,723,000		2,011,000
Interest rate	5.40%
Equipment net book value	$ 1,882,000
Notes Payable | Equipment Notes Payable, 5.4 % Due August 2025 | Minimum
Debt Instrument [Line Items]
Monthly installments	9,000
Notes Payable | Equipment Notes Payable, 5.4 % Due August 2025 | Maximum
Debt Instrument [Line Items]
Monthly installments	10,000
Term Loan | Equipment Notes Payable 5.4% Due February 2026
Debt Instrument [Line Items]
Total	1,953,000		0
Equipment net book value	1,789,000
Term Loan | Equipment Notes Payable 5.4% Due February 2026 | Minimum
Debt Instrument [Line Items]
Monthly installments	$ 3,000
Interest rate	4.00%
Term Loan | Equipment Notes Payable 5.4% Due February 2026 | Maximum
Debt Instrument [Line Items]
Monthly installments	$ 9,000
Interest rate	6.50%
Line of Credit | 3.4% Commercial Insurance Premium
Debt Instrument [Line Items]
Total	$ 0		453,000
Line of Credit | 3.4% Commercial Insurance Premium | Minimum
Debt Instrument [Line Items]
Monthly installments	$ 22,000
Interest rate	3.40%
Line of Credit | 3.4% Commercial Insurance Premium | Maximum
Debt Instrument [Line Items]
Monthly installments	$ 126,000
Interest rate	0.038%
Line of Credit | Equipment Notes Payable 3.9 % Due October 2021
Debt Instrument [Line Items]
Total	$ 837,000		0
Line of Credit | Equipment Notes Payable 3.9 % Due October 2021 | Minimum
Debt Instrument [Line Items]
Monthly installments	$ 24,000
Interest rate	3.00%
Line of Credit | Equipment Notes Payable 3.9 % Due October 2021 | Maximum
Debt Instrument [Line Items]
Monthly installments	$ 117,000
Interest rate	0.039%
Line of Credit | 4.5% Equipment Line Of Credit
Debt Instrument [Line Items]
Total	$ 4,123,000		5,791,000
Long-term debt	$ 2,700,000
Interest rate	4.50%
Initial commitment	$ 10,000,000
Line of Credit | Syndicated Credit Facility
Debt Instrument [Line Items]
Total	0		125,239,000
Senior Notes | 8.50% Senior Notes Due 2026
Debt Instrument [Line Items]
Total	$ 135,000,000		$ 0
Less debt issuance costs, net		$ (11,932,000)
Interest rate		8.50%

Mezzanine Equity (Details)

Mezzanine Equity (Details)	1 Months Ended	6 Months Ended	9 Months Ended
	Mar. 31, 2020shares	Jun. 30, 2021USD ($)	Sep. 30, 2021USD ($)trading_day$ / sharesshares	Sep. 30, 2020USD ($)shares	Dec. 31, 2020USD ($)$ / shares	Mar. 04, 2020$ / shares
Temporary Equity [Line Items]
Issuance of Series A Preferred Stock, net of issuance costs (in shares) | shares				26,000
Series A Preferred Stock, par value (in dollars per share) | $ / shares			$ 0.01		$ 0.01
Series A Preferred Stock dividends payable included in accrued expenses			$ 1,946,000	$ 877,000	$ 1,356,000
Liquidation preference (in dollars per share) | $ / shares			$ 1,000
Dividend in cash, liquidation preference percentage			10.00%
Dividend other than cash, liquidation preference percentage			13.00%
Dividend other than cash, liquidation preference percentage, upon default			16.00%
Series A Preferred Stock, aggregate liquidation preference			$ 31,682,000		28,783,000
Debt Instrument, Convertible, Conversion Term			3 months
Conversion price (in dollars per share) | $ / shares						$ 2.77
Weighted average price percentage of preferred stock			30.00%
Common stock issuable if preferred stock is converted (in shares) | shares			11,438,000
Threshold trading days | trading_day			30
Threshold consecutive trading days | trading_day			20
Conversion price, percentage			120.00%
Conversion price, upon change of control			100.00%
Dividend discount spread on treasury rate			0.50%
Make whole payment, maximum			$ 4,000,000
Conversion price, upon early redemption			103.00%
Private Placement
Temporary Equity [Line Items]
Proceeds from private placement		$ 13,000,000
Series A Preferred Stock
Temporary Equity [Line Items]
Debt Instrument, Convertible, Conversion Term			3 years
Series A Preferred Stock | Period 1
Temporary Equity [Line Items]
Debt Instrument, Convertible, Conversion Term			3 years
Series A Preferred Stock | Period 2
Temporary Equity [Line Items]
Debt Instrument, Convertible, Conversion Term			7 years
Amendment No. 3 to Credit Agreement | Series A Preferred Stock
Temporary Equity [Line Items]
Issuance of Series A Preferred Stock, net of issuance costs (in shares) | shares	26,000		26,000
Series A Preferred Stock, par value (in dollars per share) | $ / shares			$ 0.01
Original issue discount, rate			3.00%
Amendment No. 3 to Credit Agreement | Series A Preferred Stock | Private Placement
Temporary Equity [Line Items]
Proceeds from issuance, net of discount			$ 26,000,000
Original issue discount, amount			780,000
Proceeds from private placement			25,220,000
Payments of stock issuance costs			966,000
Series A Preferred Stock dividends payable included in accrued expenses			$ 997,000		$ 906,000

Common Stock Issuances (Details

Common Stock Issuances (Details) - Private Placement - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	6 Months Ended	9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Sep. 30, 2021
Subsidiary, Sale of Stock [Line Items]
Proceeds from private placement		$ 13,000
Affiliated Entity
Subsidiary, Sale of Stock [Line Items]
Sale of Stock, number of shares issued in transaction (in shares)	2,889		2,889
Sale of stock, (in dollars per share)	$ 4.50		$ 4.50
Proceeds from private placement	$ 13,000		$ 13,000

Interest Rate Swap (Details)

Interest Rate Swap (Details) - Interest Rate Swap - USD ($) $ in Thousands	Aug. 19, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Derivatives, Fair Value [Line Items]
Break fee	$ 745
Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Gain (loss) on derivative		$ (11)	$ 65	$ 190	$ 95

Contract Assets and Liabiliti_3

Contract Assets and Liabilities - Schedule of Asset and Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2021	Dec. 31, 2020
Contract with Customer, Asset, after Allowance for Credit Loss, Current [Abstract]
Costs and estimated earnings in excess of billings	$ 15,395	$ 15,395	$ 12,196
Retainage	8,116	8,116	6,133
Total contract assets	23,511	23,511	18,329
Contract with Customer, Liability [Abstract]
Billings in excess of costs and estimated earnings	12,447	12,447	6,167
Deferred revenue	1,698	1,698	128
Total contract liabilities	14,145	14,145	$ 6,295
Revenue recognized	$ 0	$ 0

Contract Assets and Liabiliti_4

Contract Assets and Liabilities - Activity (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Costs incurred on uncompleted contracts	$ 169,576	$ 123,339
Estimated earnings	19,019	18,425
Total costs and estimated earnings	188,595	141,764
Less billings to date	(185,647)	(135,735)
Net balance in process	$ 2,948	$ 6,029

Contract Assets and Liabiliti_5

Contract Assets and Liabilities - Balance Sheet Classification (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Costs and estimated earnings in excess of billings	$ 15,395	$ 12,196
Billings in excess of costs and estimated earnings	(12,447)	(6,167)
Net balance in process	2,948	6,029
Long-term contracts, loss accrual	$ 143	$ 155

Stock_Unit Based Compensation -

Stock/Unit Based Compensation - Narrative (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted in period (in shares)			736
Vested (in shares)			535
Fair value of awards vested during period	$ 2,463		$ 2,463
Common Stock | 2018 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of additional shares allowable under the plan	2,000		2,000
Number of shares reserved for future issuance (in shares)	5,007		5,007
Restricted Stock Units (RSU)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested (in shares)			535
Compensation expense	$ 550	$ 398	$ 1,308	$ 1,413
Unrecognized compensation cost	$ 2,033		$ 2,033
Compensation cost not yet recognized, period for recognition			1 year 4 months 13 days
Restricted Stock Units (RSU) | 2018 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted in period (in shares)			501
Vested (in shares)			3
Restricted Stock Units (RSU) | 2018 Omnibus Incentive Plan | Tranche one
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested (in shares)			90
Vesting period			1 year
Restricted Stock Units (RSU) | 2018 Omnibus Incentive Plan | Tranche two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested (in shares)			408
Vesting period			3 years
Performance Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted in period (in shares)			235
Vested (in shares)			0
Vesting period			3 years
Maximum number of earned PSUs for the performance period, target number of PSUs	200.00%		200.00%
Compensation expense	$ 219	$ 149	$ 459	$ 388
Unrecognized compensation cost	$ 1,128		$ 1,128
Compensation cost not yet recognized, period for recognition			2 years
Performance Stock | 2018 Omnibus Incentive Plan | Charah Management LLC
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance goal weight	50.00%		50.00%

Stock_Unit Based Compensation_2

Stock/Unit Based Compensation - Stock Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Shares
Beginning balance (in shares)	1,434
Granted (in shares)	736
Forfeited (in shares)	(102)
Vested (in shares)	(535)
Ending balance (in shares)	1,533	1,434
Weighted-Average Grant Date Fair Value
Beginning balance (in dollars per share)	$ 4.74
Granted (in dollars per share)	5.20
Forfeited (in dollars per share)	6.45
Vested (in dollars per share)	5.88
Ending balance (in dollars per share)	$ 4.46	$ 4.74
Weighted Average Remaining Contractual Terms (Years)	1 year 3 months 14 days	1 year 25 days
Aggregate Intrinsic Value	$ 7,051	$ 4,116
Restricted Stock
Shares
Beginning balance (in shares)	981
Forfeited (in shares)	(62)
Vested (in shares)	(535)
Ending balance (in shares)	885	981
Weighted-Average Grant Date Fair Value
Beginning balance (in dollars per share)	$ 5.08
Granted (in dollars per share)	5.41
Forfeited (in dollars per share)	7.54
Vested (in dollars per share)	5.88
Ending balance (in dollars per share)	$ 4.62	$ 5.08
Weighted Average Remaining Contractual Terms (Years)	1 year 1 month 17 days	9 months 14 days
Aggregate Intrinsic Value	$ 4,072	$ 2,817
Performance Stock
Shares
Beginning balance (in shares)	453
Granted (in shares)	235
Forfeited (in shares)	(40)
Vested (in shares)	0
Ending balance (in shares)	648	453
Weighted-Average Grant Date Fair Value
Beginning balance (in dollars per share)	$ 4.02
Granted (in dollars per share)	4.74
Forfeited (in dollars per share)	4.76
Vested (in dollars per share)	0
Ending balance (in dollars per share)	$ 4.24	$ 4.02
Weighted Average Remaining Contractual Terms (Years)	1 year 6 months 3 days	1 year 8 months 4 days
Aggregate Intrinsic Value	$ 2,979	$ 1,299

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Income tax expense	$ 203	$ 608	$ 432	$ 608
Effective tax rate	23.70%
Statutory tax rate			21.00%
Statutory tax rate prior to valuation allowance			5.10%
Deferred tax liabilities	$ 800		$ 800		$ 368

Loss Per Share - Calculation of

Loss Per Share - Calculation of EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Numerator:
Loss from continuing operations, net of tax and non-controlling interest	$ (1,677)	$ (4,335)	$ (7,130)	$ (28,941)
Deemed and imputed dividends on Series A Preferred Stock	(148)	(147)	(443)	(314)
Series A Preferred Stock dividends	(1,946)	(877)	(6,161)	(1,846)
Net loss from continuing operations attributable to common stockholders	(3,771)	(5,359)	(13,734)	(31,101)
Net income from discontinued operations	0	119	0	6,939
Net loss attributable to common stockholders	$ (3,771)	$ (5,240)	$ (13,734)	$ (24,162)
Denominator:
Weighted-average shares outstanding (in shares)	32,277	29,986	30,955	29,853
Dilutive share-based awards (in shares)	0	0	0	0
Total weighted average shares outstanding, including dilutive shares (in shares)	32,277	29,986	30,955	29,853
Net loss from continuing operations per common share
Basic (in dollars per share)	$ (0.12)	$ (0.18)	$ (0.44)	$ (1.04)
Diluted (in dollars per share)	(0.12)	(0.18)	(0.44)	(1.04)
Net income from discontinued operations per common share
Basic (in dollars per share)	0	0.01	0	0.23
Diluted (in dollars per share)	0	0.01	0	0.23
Net loss attributable to common stockholders per common share
Basic (in dollars per share)	(0.12)	(0.17)	(0.44)	(0.81)
Diluted (in dollars per share)	$ (0.12)	$ (0.17)	$ (0.44)	$ (0.81)

Loss Per Share - Antidilutive S

Loss Per Share - Antidilutive Securities (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive restricted and performance stock units (in shares)	12,379	11,430	12,064	8,453
Anti-dilutive restricted and performance stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive restricted and performance stock units (in shares)	1,298	1,679	1,325	1,494
Anti-dilutive Series A Preferred Stock convertible into common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive restricted and performance stock units (in shares)	11,081	9,751	10,739	6,959