Perma-Fix Environmental Services (PESI) 10-Q 9 May 24 2024 Q1 Quarterly report Financial data

Cover

Cover - shares	3 Months Ended
	Mar. 31, 2024	May 02, 2024
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Mar. 31, 2024
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2024
Current Fiscal Year End Date	--12-31
Entity File Number	1-11596
Entity Registrant Name	PERMA FIX ENVIRONMENTAL SERVICES, INC
Entity Central Index Key	0000891532
Entity Tax Identification Number	58-1954497
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	8302 Dunwoody Place
Entity Address, Address Line Two	Suite 250
Entity Address, City or Town	Atlanta
Entity Address, State or Province	GA
Entity Address, Postal Zip Code	30350
City Area Code	(770)
Local Phone Number	587-9898
Title of 12(b) Security	Common Stock, $.001 Par Value
Trading Symbol	PESI
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		13,735,303

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands		Mar. 31, 2024	Dec. 31, 2023
Current assets:
Cash		$ 2,374	$ 7,500
Accounts receivable, net of allowance for credit losses of $19 and $30, respectively		8,701	9,722
Unbilled receivables		8,797	8,432
Inventories		1,071	1,155
Prepaid and other assets		3,955	3,738
Current assets related to discontinued operations		13	13
Total current assets		24,911	30,560
Property and equipment:
Buildings and land		24,319	24,311
Equipment		22,930	22,809
Vehicles		434	434
Leasehold improvements		8	8
Office furniture and equipment		1,140	1,130
Construction-in-progress		1,158	1,010
Total property and equipment		49,989	49,702
Less accumulated depreciation		(31,099)	(30,693)
Net property and equipment		18,890	19,009
Property and equipment related to discontinued operations	[1]	81	81
Operating lease right-of-use assets		1,885	1,990
Intangibles and other long term assets:
Permits		9,973	9,905
Other intangible assets - net		442	461
Finite risk sinking fund (restricted cash)		12,222	12,074
Deferred tax assets		5,284	4,299
Other assets		351	370
Total assets		74,039	78,749
Current liabilities:
Accounts payable		7,979	9,582
Accrued expenses		6,238	6,560
Disposal/transportation accrual		1,515	1,198
Deferred revenue		7,295	6,815
Accrued closure costs - current		85	79
Current portion of long-term debt		673	773
Current portion of operating lease liabilities		346	380
Current portion of finance lease liabilities		287	291
Current liabilities related to discontinued operations		238	269
Total current liabilities		24,656	25,947
Accrued closure costs		8,015	8,051
Long-term debt, less current portion		1,873	1,975
Long-term operating lease liabilities, less current portion		1,594	1,670
Long-term finance lease liabilities, less current portion		706	776
Long-term liabilities related to discontinued operations		955	953
Total long-term liabilities		13,143	13,425
Total liabilities		37,799	39,372
Commitments and Contingencies (Note 9 )
Stockholders’ Equity:
Preferred Stock, $.001 par value; 2,000,000 shares authorized, no shares issued and outstanding
Common Stock, $.001 par value; 30,000,000 shares authorized; 13,730,580 and 13,654,201 shares issued, respectively; 13,722,938 and 13,646,559 shares outstanding, respectively		14	14
Additional paid-in capital		116,981	116,502
Accumulated deficit		(80,511)	(76,951)
Accumulated other comprehensive loss		(156)	(100)
Less Common Stock in treasury, at cost; 7,642 shares		(88)	(88)
Total stockholders’ equity		36,240	39,377
Total liabilities and stockholders’ equity		$ 74,039	$ 78,749
[1]net of accumulated depreciation of $ 10,000

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 19	$ 30
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	2,000,000	2,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	30,000,000	30,000,000
Common stock, shares issued	13,730,580	13,654,201
Common stock, shares outstanding	13,722,938	13,646,559
Treasury stock, shares	7,642	7,642

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Income Statement [Abstract]
Revenues	$ 13,617,000	$ 20,107,000
Cost of goods sold	14,237,000	17,098,000
Gross (loss) profit	(620,000)	3,009,000
Selling, general and administrative expenses	3,544,000	3,486,000
Research and development	296,000	99,000
Loss from operations	(4,460,000)	(576,000)
Other income (expense):
Interest income	174,000	127,000
Interest expense	(116,000)	(53,000)
Interest expense-financing fees	(13,000)	(20,000)
Other	1,000
Loss from continuing operations before taxes	(4,414,000)	(522,000)
Income tax benefit	(956,000)	(204,000)
Loss from continuing operations, net of taxes	(3,458,000)	(318,000)
Loss from discontinued operations (net of taxes) (Note 10)	(102,000)	(93,000)
Net loss	$ (3,560,000)	$ (411,000)
Net loss per common share - basic and diluted:
Continuing operations - basic	$ (0.25)	$ (0.02)
Continuing operations - diluted	(0.25)	(0.02)
Discontinued operations - basic	(0.01)	(0.01)
Discontinued operations - diluted	(0.01)	(0.01)
Net loss per common share - basic	(0.26)	(0.03)
Net loss per common share - diluted	$ (0.26)	$ (0.03)
Number of common shares used in computing net loss per share:
Basic	13,676	13,358
Diluted	13,676	13,358

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Income Statement [Abstract]
Net loss	$ (3,560)	$ (411)
Other comprehensive (loss) income:
Foreign currency translation (loss) gain	(56)	7
Total other comprehensive (loss) income	(56)	7
Comprehensive loss	$ (3,616)	$ (404)

Condensed Consolidated Statem_3

Condensed Consolidated Statement of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Common Stock Held in Treasury [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Total
Beginning balance, value at Dec. 31, 2022	$ 13	$ 115,209	$ (88)	$ (165)	$ (77,436)	$ 37,533
Beginning balance, shares at Dec. 31, 2022	13,332,398
Net loss					(411)	(411)
Foreign currency translation				7		7
Issuance of Common Stock for services		118				118
Issuance of Common Stock for services, shares	33,319
Issuance of Common Stock upon exercise of options		7				7
Issuance of Common Stock upon exercise of options, shares	31,719
Stock-Based Compensation		118				118
Ending balance, value at Mar. 31, 2023	$ 13	115,452	(88)	(158)	(77,847)	37,372
Ending balance, shares at Mar. 31, 2023	13,397,436
Beginning balance, value at Dec. 31, 2023	$ 14	116,502	(88)	(100)	(76,951)	39,377
Beginning balance, shares at Dec. 31, 2023	13,654,201
Net loss					(3,560)	(3,560)
Foreign currency translation				(56)		(56)
Issuance of Common Stock for services		118				118
Issuance of Common Stock for services, shares	14,963
Issuance of Common Stock upon exercise of options		104				104
Issuance of Common Stock upon exercise of options, shares	31,416
Issuance of Common Stock upon exercise of warrant		105				105
Issuance of Common Stock upon exercise of warrant, shares	30,000
Stock-Based Compensation		152				152
Ending balance, value at Mar. 31, 2024	$ 14	$ 116,981	$ (88)	$ (156)	$ (80,511)	$ 36,240
Ending balance, shares at Mar. 31, 2024	13,730,580

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash flows from operating activities:
Net loss	$ (3,560,000)	$ (411,000)
Less: loss from discontinued operations, net of taxes (Note 10)	(102,000)	(93,000)
Loss from continuing operations, net of taxes	(3,458,000)	(318,000)
Adjustments to reconcile loss from continuing operations to cash (used in) provided by operating activities :
Depreciation and amortization	431,000	747,000
Amortization of debt issuance costs	12,000	20,000
Deferred tax benefit	(956,000)	(204,000)
Recovery of credit losses on accounts receivable	(11,000)	(6,000)
Issuance of common stock for services	118,000	118,000
Stock-based compensation	152,000	118,000
Changes in operating assets and liabilities of continuing operations:
Accounts receivable	1,032,000	(1,511,000)
Unbilled receivables	(365,000)	(639,000)
Prepaid expenses, inventories and other assets	334,000	1,876,000
Accounts payable, accrued expenses and unearned revenue	(1,721,000)	1,561,000
Cash (used in) provided by continuing operations	(4,432,000)	1,762,000
Cash used in discontinued operations	(159,000)	(198,000)
Cash (used in) provided by operating activities	(4,591,000)	1,564,000
Cash flows from investing activities:
Purchases of property and equipment (net of financed amount)	(244,000)	(748,000)
Cash used in investing activities of continuing operations	(244,000)	(748,000)
Cash flows from financing activities:
Repayments of revolving credit borrowings	(18,314,000)	(20,257,000)
Borrowing on revolving credit	18,314,000	20,257,000
Proceeds from issuance of Common Stock upon exercise of options/warrant	209,000	7,000
Principal repayments of finance lease liabilities	(75,000)	(41,000)
Principal repayments of long term debt	(259,000)	(137,000)
Payment of debt issuance costs		(33,000)
Cash used in financing activities	(125,000)	(204,000)
Effect of exchange rate changes on cash	(18,000)
(Decrease) increase in cash and finite risk sinking fund (restricted cash)	(4,978,000)	612,000
Cash and finite risk sinking fund (restricted cash) at beginning of period	19,574,000	13,436,000
Cash and finite risk sinking fund (restricted cash) at end of period	14,596,000	14,048,000
Supplemental disclosure:
Interest paid	117,000	55,000
Income taxes paid
Non-cash investing and financing activities:
Equipment purchase subject to finance lease		50,000
Equipment purchase subject to finance	$ 44,000

Basis of Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2024
Accounting Policies [Abstract]
Basis of Presentation	1. Basis of Presentation The condensed consolidated financial statements included herein have been prepared by the Company (which may be referred to as we, us or our), without an audit, pursuant to the rules and regulations of the Securities and Exchange Commission (the “Commission”). Certain information and note disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) have been condensed or omitted pursuant to such rules and regulations, although the Company believes the disclosures which are made are adequate to make the information presented not misleading. Further, the condensed consolidated financial statements reflect, in the opinion of management, all adjustments (which include only normal recurring adjustments) necessary to present fairly the financial position and results of operations as of and for the periods indicated. The results of operations for the three months ended March 31, 2024 are not necessarily indicative of results to be expected for the fiscal year ending December 31, 2024. These condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and the notes thereto included in the Company’s Annual Report on Form 10-K as of and for the year ended December 31, 2023. The condensed consolidated financial statements include the accounts of our wholly-owned subsidiaries. Financial Position and Liquidity The Company’s results of operations in the first quarter of 2024 were impacted by accelerated investments and several events, which included the following: ● Accelerated investments in research and development (“R&D”) on our new technology to treat Per- and Polyfluorinated Substances (“PFAS”); ● Reduced activities by our customers due to poor weather conditions, which resulted in the closure of two of our facilities for a week, including delays in shipments to support backlog; ● Continuing Resolution impacts due to the inability of Congress to pass a Federal Budget through late March 2024, which contributed to delays in procurements, project starts and waste shipment, due to uncertain budget projections by our government clients; ● Completion of two large projects in the Services Segment that were not replaced by new project starts due to delays in mobilization activities until late April; and ● All three primary treatment facilities realized outages in March which impacted revenue as the Company utilized the aforementioned slowdowns for equipment replacement and repairs, program enhancements, and testing to support permit expansion and broader market penetration. The Company believes that most of these accelerated investments and unanticipated impacts should have limited duration effects to its financial performance. The Company expects that the second quarter will not include material continued impact from these activities. With the passage of the Federal Budget in late March 2024 and improved weather conditions, the Company has begun to see steady improvements in waste receipts, project starts that were delayed and increased procurement activities. The Company’s waste treatment backlog stands at approximately $ 10,580,000 1,878,000 8,702,000 The Company’s cash flow requirements for the next twelve months will consist primarily of general working capital needs, scheduled principal payments on its debt obligations, remediation projects, and planned capital expenditures which include its PFAS technology. The Company plans to fund these requirements from its operations, credit facility availability, cash on hand (which will include, when received, cash from outstanding receivables due to our Perma-Fix Canada, Inc. subsidiary from a certain customer - See “Note 9 – Commitments and Contingencies - Perma-Fix Canada, Inc. (“PF Canada”)” for a discussion of this outstanding receivables) and possible other methods. The Company’s ability to utilize its credit facility from its lender is subject to meeting our quarterly financial covenant requirements, among other things. The Company continues to explore all sources of increasing its capital and/or liquidity and to improve its revenue and working capital, including, but not limited to entering into equity transactions. There are no assurances that the Company will be successful in increasing its liquidity through its efforts. The Company is continually reviewing operating costs and reviewing the possibility of further reducing operating costs and non-essential expenditures to bring them in line with revenue levels, when necessary. The Company believes that its cash flows from operations, its available liquidity from its credit facility, and its cash on hand (which will include, when received, cash from the outstanding Canadian receivables noted above) should be sufficient to fund our operations for the next twelve months.

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2024
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	2. Summary of Significant Accounting Policies Our accounting policies are as set forth in the notes to the December 31, 2023, consolidated financial statements referred to above. Recently Issued Accounting Standards – Not Yet Adopted In August 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023-05, “Business Combinations—Joint Venture Formations (Subtopic 805-60): Recognition and Initial Measurement.” ASU 2023-05 applies to the formation of a “joint venture” or a “corporate joint venture” and requires a joint venture to initially measure all contributions received upon its formation at fair value. The guidance does not impact accounting by the venturers. The new guidance is applicable to joint venture entities with a formation date on or after January 1, 2025 on a prospective basis. The Company is currently evaluating the impact of this ASU on its consolidated financial statements. In November 2023, the FASB issued ASU 2023-07, “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures,” which expands reportable segment disclosure requirements by requiring disclosures of significant reportable segment expenses that are regularly provided to the chief operating decision maker (“CODM”) and included within each reported measure of a segment’s profit or loss. The ASU also requires disclosure of the title and position of the individual identified as the CODM and an explanation of how the CODM uses the reported measures of a segment’s profit or loss in assessing segment performance and deciding how to allocate resources. Additionally, ASU 2023-07 requires all segment profit or loss and assets disclosures to be provided on an annual and interim basis. The amendments in this ASU are required to be adopted for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024 with early adoption permitted, and should be applied on a retrospective basis. ASU 2023-07 will be effective for the Company’s financial statements for the year ended December 31, 2024. This ASU will not have impact on the Company’s consolidated financial condition or results of operations. The Company is evaluating the impact to the related segment reporting disclosures. In December 2023, the FASB issued ASU No. 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures,” which modifies the rules on income tax disclosures to require entities to disclose (1) specific categories in the rate reconciliation, (2) the income or loss from continuing operations before income tax expense or benefit (separated between domestic and foreign) and (3) income tax expense or benefit from continuing operations (separated by federal, state and foreign). ASU 2023-09 also requires entities to disclose their income tax payments to international, federal, state and local jurisdictions, among other changes. The guidance is effective for annual periods beginning after December 15, 2024. ASU 2023-09 should be applied on a prospective basis, but retrospective application is permitted. This ASU will not have impact on the Company’s consolidated financial condition or results of operations. The Company is evaluating the impact to its income taxes reporting disclosures.

Revenue

Revenue	3 Months Ended
	Mar. 31, 2024
Revenue from Contract with Customer [Abstract]
Revenue	3. Revenue Disaggregation of Revenue In general, the Company’s business segmentation is aligned according to the nature and economic characteristics of our services and provides meaningful disaggregation of each business segment’s results of operations. The nature of the Company’s performance obligations within our Treatment and Services Segments results in the recognition of our revenue primarily over time. The following tables present further disaggregation of our revenues by different categories for our Services and Treatment Segments: Schedule of Disaggregation of Revenue Revenue by Contract Type Treatment Services Total Treatment Services Total (In thousands) Three Months Ended Three Months Ended March 31, 2024 March 31, 2023 Treatment Services Total Treatment Services Total Fixed price $ 8,709 $ 4,314 $ 13,023 $ 9,594 $ 8,647 $ 18,241 Time and materials — 594 594 — 1,866 1,866 Total $ 8,709 $ 4,908 $ 13,617 $ 9,594 $ 10,513 $ 20,107 Revenue by generator Treatment Services Total Treatment Services Total (In thousands) Three Months Ended Three Months Ended March 31, 2024 March 31, 2023 Treatment Services Total Treatment Services Total Domestic government $ 5,761 $ 4,303 $ 10,064 $ 7,257 $ 9,718 $ 16,975 Domestic commercial 2,501 504 3,005 2,206 597 2,803 Foreign government — 79 79 95 177 272 Foreign commercial 447 22 469 36 21 57 Total $ 8,709 $ 4,908 $ 13,617 $ 9,594 $ 10,513 $ 20,107 Contract Balances The timing of revenue recognition and billings results in unbilled receivables (contract assets). The Company’s contract liabilities consist of deferred revenues which represent advance payment from customers in advance of the completion of our performance obligation. The following table represents changes in our contract asset and contract liabilities balances: Schedule of Contract Balances Year-to-date Year-to-date (In thousands) March 31, 2024 December 31, 2023 Change ($) Change (%) Contract assets Unbilled receivables - current $ 8,797 $ 8,432 $ 365 4.3 % Contract liabilities Deferred revenue $ 7,295 $ 6,815 $ 480 7.0 % During the three months ended March 31, 2024, and 2023, the Company recognized revenue of $ 3,165,000 3,494,000 Remaining Performance Obligations The Company applies the practical expedient in ASC 606-10-50-14 and does not disclose information about remaining performance obligations that have original expected durations of one year or less. Within our Services Segment, there are service contracts which provide that the Company has a right to consideration from a customer in an amount that corresponds directly with the value to the customer of our performance completed to date. For those contracts, the Company has utilized the practical expedient in ASC 606-10-55-18, which allows the Company to recognize revenue in the amount for which we have the right to invoice; accordingly, the Company does not disclose the value of remaining performance obligations for those contracts. The Company’s contracts and subcontracts relating to activities at governmental sites generally allow for termination for convenience at any time at the government’s option without payment of a substantial penalty. The Company does not disclose remaining performance obligations on these contracts.

Leases

Leases	3 Months Ended
	Mar. 31, 2024
Leases
Leases	4. Leases At the inception of an arrangement, the Company determines if an arrangement is, or contains, a lease based on facts and circumstances present in that arrangement. Lease classifications, recognition, and measurement are then determined at the lease commencement date. The Company’s operating lease right-of-use (“ROU”) assets and operating lease liabilities include primarily leases for office and warehouse spaces used to conduct our business. The Company’s operating leases also include a building with land utilized for our waste treatment operations which includes a purchase option. Finance leases consist primarily of processing and transport equipment used by our facilities’ operations. The components of lease cost for the Company’s leases were as follows (in thousands): Schedule of Components of Lease Cost 2024 2023 Three Months Ended March 31, 2024 2023 Operating Lease: Lease cost $ 143 $ 156 Finance Leases: Amortization of ROU assets 65 38 Interst on lease liablity 22 6 Finance lease 87 44 Total lease cost $ 230 $ 200 The weighted average remaining lease term and the weighted average discount rate for operating and finance leases at March 31, 2024 were: Schedule of Weighted Average Lease Operating Leases Finance Leases Weighted average remaining lease terms (years) 5.4 4.3 Weighted average discount rate 7.6 % 8.8 % The weighted average remaining lease term and the weighted average discount rate for operating and finance leases at March 31, 2023 were: Operating Leases Finance Leases Weighted average remaining lease terms (years) 6.1 3.0 Weighted average discount rate 7.8 % 5.5 % The following table reconciles the undiscounted cash flows for the operating and finance leases at March 31, 2024, to the operating and finance lease liabilities recorded on the balance sheet (in thousands): Schedule of Operating and Finance Lease Liability Maturity Operating Leases Finance Leases 2024 $ 372 $ 275 2025 433 345 2026 416 192 2027 406 157 2028 383 134 2029 and thereafter 366 102 Total undiscounted lease payments 2,376 1,205 Less: Imputed interest (436 ) (212 ) Present value of lease payments $ 1,940 $ 993 Current portion of operating lease obligations $ 346 $ — Long-term operating lease obligations, less current portion $ 1,594 $ — Current portion of finance lease obligations $ — $ 287 Long-term finance lease obligations, less current portion $ — $ 706 Supplemental cash flow and other information related to our leases were as follows (in thousands): Schedule of Supplemental Cash Flow and Other Information Related to Leases 2024 2023 Three Months Ended March 31, 2024 2023 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flow from operating leases $ 147 $ 144 Operating cash flow from finance leases $ 22 $ 6 Financing cash flow from finance leases $ 75 $ 41 ROU assets obtained in exchange for lease obligations for: Finance liabilities $ — $ 50

Intangible Assets

Intangible Assets	3 Months Ended
	Mar. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	5. Intangible Assets The following table summarizes information relating to the Company’s definite-lived intangible assets: Schedule of Definite Lived Intangible Assets March 31, 2024 December 31, 2023 Weighted Average Gross Net Gross Net Amortization Period Carrying Accumulated Carrying Carrying Accumulated Carrying (Years) Amount Amortization Amount Amount Amortization Amount Other Intangibles (amount in thousands) Patents 8.3 $ 710 $ (390 ) $ 320 $ 710 $ (387 ) $ 323 Software 3 673 (551 ) 122 667 (529 ) 138 Total $ 1,383 $ (941 ) $ 442 $ 1,377 $ (916 ) $ 461 The intangible assets noted above are amortized on a straight-line basis over their useful lives. The following table summarizes the expected amortization over the next five years for our definite-lived intangible assets: Schedule of Finite Lived Intangible Assets, Future Amortization Expense Amount Year (In thousands) 2024 (Remaining) $ 58 2025 45 2026 40 2027 22 2028 13 Amortization expenses relating to the definite-lived intangible assets as discussed above were $ 25,000 55,000

Capital Stock, Stock Plans, War

Capital Stock, Stock Plans, Warrants and Stock Based Compensation	3 Months Ended
	Mar. 31, 2024
Share-Based Payment Arrangement [Abstract]
Capital Stock, Stock Plans, Warrants and Stock Based Compensation	6. Capital Stock, Stock Plans, Warrants and Stock Based Compensation The Company has certain stock option plans under which it may award incentive stock options (“ISOs”) and/or non-qualified stock options (“NQSOs”) to employees, officers, outside directors, and outside consultants. On January 18, 2024, the Company granted ISOs to certain employees under the 2017 Stock Option Plan (“2017 Plan”), for the purchase of up to an aggregate of 45,000 .001 six years one-fifth vesting annually over a five-year period 7.75 The following table summarizes stock-based compensation recognized for the three months ended March 31, 2024, and 2023 for our employee and director stock options. Schedule of Share-based Compensation, Allocation of Recognized Period Costs 2024 2023 Three Months Ended Stock Options March 31, 2024 2023 Employee Stock Options $ 91,000 $ 86,000 Director Stock Options 61,000 32,000 Total $ 152,000 $ 118,000 At March 31, 2024, the Company had approximately $ 1,823,000 3.2 The summary of the Company’s total Stock Option Plans as of March 31, 2024 and March 31, 2023, and changes during the periods then ended, are presented below. The Company’s Plans consist of the 2017 Plan and the 2003 Outside Directors Stock Plan (the “2003 Plan”): Schedule of Stock Options Roll Forward Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term (years) Aggregate Intrinsic Value (4) Options outstanding January 1, 2024 994,500 $ 5.57 - Granted 45,000 $ 7.75 Exercised (43,500 ) $ 5.61 $ 212,410 Forfeited (11,000 ) $ 7.01 Options outstanding end of period (1) 985,000 $ 5.66 4.8 $ 6,139,346 Options exercisable at March 31, 2024 (2) 350,300 $ 5.06 3.8 $ 2,391,576 Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term (years) Aggregate Intrinsic Value (4) Options outstanding January 1, 2023 1,018,400 $ 5.02 - Granted 295,000 $ 3.95 Exercised (44,400 ) $ 3.56 $ 370,196 Forfeited/expired (4,500 ) $ 3.90 Options outstanding end of period (3) 1,264,500 $ 4.83 4.2 $ 8,791,279 Options exercisable at March 31, 2023 (3) 499,500 $ 4.30 2.3 $ 6,047,029 (1) Options with exercise prices ranging from $ 3.15 9.81 (2) Options with exercise prices ranging from $ 3.15 7.50 (3) Options with exercise prices ranging from $ 2.79 7.50 (4) The intrinsic value of a stock option is the amount by which the market value of the underlying stock During the three months ended March 31, 2024, the Company issued a total of 14,963 118,000 During the three months ended March 31, 2024, the Company issued an aggregate 12,916 25,000 3.15 7.005 18,500 18,500 3.95 7.005 104,000 In connection with a $ 2,500,000 60,000 3.51 30,000 30,000 105,000

Loss Per Share

Loss Per Share	3 Months Ended
	Mar. 31, 2024
Earnings Per Share [Abstract]
Loss Per Share	7. Loss Per Share Basic loss per share is calculated based on the weighted-average number of outstanding common shares during the applicable period. Diluted loss per share is based on the weighted-average number of outstanding common shares plus the weighted-average number of potential outstanding common shares. In periods where they are anti-dilutive, such amounts are excluded from the calculations of dilutive loss earnings per shares. The following table reconciles the loss and average share amounts used to compute both basic and diluted loss per share: Schedule of Earnings Per Share Three Months Ended (Unaudited) March 31, (Amounts in Thousands, Except for Per Share Amounts) 2024 2023 Loss per common share from continuing operations Loss from continuing operations, net of taxes $ (3,458 ) $ (318 ) Basic and diluted loss per share $ (.25 ) $ (.02 ) Loss per common share from discontinued operations, net of taxes Loss from discontinued operations, net of taxes $ (102 ) $ (93 ) Basic and diluted loss per share $ (.01 ) $ (.01 ) Net loss per common share Net loss $ (3,560 ) $ (411 ) Basic and diluted loss per share $ (.26 ) $ (.03 ) Weighted average shares outstanding: Basic weighted average shares outstanding 13,676 13,358 Add: dilutive effect of stock options — — Diluted weighted average shares outstanding 13,676 13,358 Potential shares excluded from above weighted average share calculations due to their anti-dilutive effect include: Stock options 75 335

Long Term Debt

Long Term Debt	3 Months Ended
	Mar. 31, 2024
Debt Disclosure [Abstract]
Long Term Debt	8. Long Term Debt Long-term debt consists of the following as of March 31, 2024, and December 31, 2023: Schedule of Long Term Debt (Amounts in Thousands) March 31, 2024 December 31, 2023 Revolving Credit (1) $ — $ — Revolving Credit May 15, 2027 10.5 (1) $ — $ — Term Loan 1 May 15, 2027 10.2 (1) 107 213 Term Loan 2 May 15, 2027 9.5 (1) 2,208 2,333 Capital Line May 15, 2027 9.0 (1) 332 358 Debt Issuance Costs (158 ) (2) (170 ) (2) Notes Payable up 10.7 9.1 57 14 Total debt 2,546 2,748 Less current portion of long-term debt 673 773 Long-term debt $ 1,873 $ 1,975 (1) Our revolving credit facility is collateralized by our accounts receivable, and our term loans and capital line are collateralized by our property, plant, and equipment. (2) Aggregate unamortized debt issuance costs in connection with the Company’s credit facility, which consists of the revolving credit, Term loan 1, Term loan 2 and Capital Line, as applicable. Revolving Credit and Term Loan Agreement The Company entered into a Second Amended and Restated Revolving Credit, Term Loan and Security Agreement, dated May 8, 2020 (“Loan Agreement”), with PNC National Association (“PNC” and “lender”), acting as agent and lender. The Loan Agreement, as amended from time to time, provides the Company with the following credit facility with a maturity date of May 15, 2027 12,500,000 1,742,000 35,547 2,500,000 41,667 1,000,000 524,000 8,700 Pursuant to the Loan Agreement, as amended, payments of annual interest rates are as follows: (i) interest due on the revolving credit is at prime (8.50% at March 31, 2024) plus 2% or Secured Overnight Finance Rate (“SOFR”) (as defined in the Loan Agreement, as amended) plus 3.00% plus an SOFR Adjustment applicable for an interest period selected by the Company; (ii) interest due on each Term Loan 1 and the Capital Line is at prime plus 2.50% or SOFR plus 3.50% plus an SOFR Adjustment applicable for an interest period selected by the Company; and (iii) interest due on Term Loan 2 is at prime plus 3% or SOFR plus 4.00% plus an SOFR Adjustment applicable for an interest period selected by the Company. SOFR Adjustment rates of 0.10% and 0.15% are applicable for a one-month interest period and three-month period, respectively, that may be selected by the Company. The Company agreed to pay PNC 1.0% of the total financing under the Loan Agreement, as amended, in the event the Company pays off its obligations on or before July 31, 2024, and 0.5% of the total financing if the Company pays off its obligations after July 31, 2024, to and including July 31, 2025. No early termination fee shall apply if the Company pays off its obligations under Loan Agreement, as amended, after July 31, 2025 At March 31, 2024, the borrowing availability under the Company’s credit facility was approximately $ 2,379,000 3,950,000 750,000 The Company’s credit facility under its Loan Agreement, as amended, with PNC contains certain financial covenants, along with customary representations and warranties. A breach of any of these financial covenants, unless waived by PNC, could result in a default under our credit facility allowing our lender to immediately require the repayment of all outstanding debt under our credit facility and terminate all commitments to extend further credit. The Company was not required to perform testing of its fixed charge coverage ratio (“FCCR”) requirement for the first quarter of 2024 pursuant to an amendment dated May 8, 2024, to the Company’s Loan Agreement, as amended (see “Note 15 – Subsequent Events – Credit Facility” for this amendment which removed the testing requirement of the FCCR for the first quarter of 2024, among other things). The Company met all of its other financial covenant requirements in the first quarter of 2024.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	9. Commitments and Contingencies Hazardous Waste In connection with our waste management services, the Company processes hazardous, non-hazardous, low-level radioactive and mixed (containing both hazardous and low-level radioactive) waste, which the Company transports to its own, or other, facilities for destruction or disposal. As a result of disposing of hazardous substances, in the event any cleanup is required at the disposal site, the Company could be a potentially responsible party for the costs of the cleanup notwithstanding any absence of fault on our part. Legal Matters In the normal course of conducting our business, the Company may be involved in various litigation. The Company is not a party to any litigation or governmental proceeding which our management believes could result in any judgments or fines against us that would have a material adverse effect on our financial position, liquidity or results of future operations. Tetra Tech EC, Inc. (“Tetra Tech”) During July 2020, Tetra Tech EC, Inc. (“Tetra Tech”) filed a complaint in the U.S. District Court for the Northern District of California (the “Court”) against CH2M Hill, Inc. (“CH2M”) and four subcontractors of CH2M, including the Company (“Defendants”). The complaint alleges various claims, including a claim for negligence, negligent misrepresentation, equitable indemnification and related business claims against all Defendants related to alleged damages suffered by Tetra Tech in respect of certain draft reports prepared by Defendants at the request of the U.S. Navy as part of an investigation and review of certain whistleblower complaints about Tetra Tech’s environmental restoration at the Hunter’s Point Naval Shipyard in San Francisco. CH2M was hired by the Navy in 2016 to review Tetra Tech’s work. CH2M subcontracted with environmental consulting and cleanup firms Battelle Memorial Institute, Cabrera Services, Inc., SC&A, Inc. and the Company to assist with the review, according to the complaint. The Company’s insurance carrier is providing a defense on our behalf in connection with this lawsuit, subject to a $ 100,000 The majority of Tetra Tech’s claims have been dismissed by the Court. Remaining claims include: (1) intentional interference with contractual relations; and (2) inducing a breach of contract. The Company continues to believe it has no liability exposure to Tetra Tech. Perma-Fix Canada Inc. (“PF Canada”) During the fourth quarter of 2021, PF Canada received a Notice of Termination (“NOT”) from Canadian Nuclear Laboratories, LTD. (“CNL”) on a Task Order Agreement (“TOA”) that PF Canada entered into with CNL in May 2019 for remediation work within Ontario, Canada (“Agreement”). The NOT was received after work under the TOA was substantially completed and work under the TOA has since been completed. CNL may terminate the TOA at any time for convenience. At year-end 2023, PF Canada had approximately $ 2,389,000 1,612,000 Insurance The Company has a 25 28,177,000 23,376,000 12,222,000 12,074,000 2,751,000 2,603,000 148,000 67,000 100 Letter of Credits and Bonding Requirements From time to time, the Company is required to post standby letters of credit and various bonds to support contractual obligations to customers and other obligations, including facility closures. At March 31, 2024, the total amount of standby letters of credit outstanding was approximately $ 3,950,000 26,747,000

Discontinued Operations

Discontinued Operations	3 Months Ended
	Mar. 31, 2024
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations	10. Discontinued Operations The Company’s discontinued operations consist of all our subsidiaries included in our previous Industrial Segment which encompasses subsidiaries divested in 2011 and prior and three previously closed locations. The Company’s discontinued operations had net losses of $ 102,000 29,000 93,000 30,000 The following table presents the major class of assets of discontinued operations as of March 31, 2024, and December 31, 2023. No assets and liabilities were held for sale at each of the periods noted. Schedule of Disposal Groups, Including Discontinued Operation Balance Sheet March 31, December 31, (Amounts in Thousands) 2024 2023 Current assets Other assets $ 13 $ 13 Total current assets 13 13 Long-term assets Property, plant and equipment, net (1) 81 81 Total long-term assets 81 81 Total assets $ 94 $ 94 Current liabilities Accounts payable $ 94 $ 80 Accrued expenses and other liabilities 128 128 Environmental liabilities 16 61 Total current liabilities 238 269 Long-term liabilities Closure liabilities 171 169 Environmental liabilities 784 784 Total long-term liabilities 955 953 Total liabilities $ 1,193 $ 1,222 (1) net of accumulated depreciation of $ 10,000

Operating Segments

Operating Segments	3 Months Ended
	Mar. 31, 2024
Segment Reporting [Abstract]
Operating Segments	11. Operating Segments In accordance with ASC 280, “Segment Reporting”, the Company defines an operating segment as a business activity: (1) from which we may earn revenue and incur expenses; (2) whose operating results are regularly reviewed by the CODM to make decisions about resources to be allocated to the segment and assess its performance; and (3) for which discrete financial information is available. Our reporting segments are defined below: TREATMENT SEGMENT, which includes: - nuclear, low-level radioactive, mixed waste (containing both hazardous and low-level radioactive constituents), hazardous and non-hazardous waste treatment, processing and disposal services primarily through four uniquely licensed and permitted treatment and storage facilities; and - R&D activities to identify, develop and implement innovative waste processing techniques for problematic waste streams. SERVICES SEGMENT, which includes: - Technical services, which include: o professional radiological measurement and site survey of large government and commercial installations using advanced methods, technology and engineering; o integrated Occupational Safety and Health services including industrial hygiene (“IH”) assessments; hazardous materials surveys, e.g., exposure monitoring; lead and asbestos management/abatement oversight; indoor air quality evaluations; health risk and exposure assessments; health & safety plan/program development, compliance auditing and training services; and Occupational Safety and Health Administration (“OSHA”) citation assistance; o global technical services providing consulting, engineering, project management, waste management, environmental, and decontamination and decommissioning field, technical, and management personnel and services to commercial and government customers; and o on-site waste management services to commercial and governmental customers. - Nuclear services, which include: o technology-based services including engineering, decontamination and decommissioning (“D&D”), specialty services and construction, logistics, transportation, processing and disposal; o remediation of nuclear licensed and federal facilities and the remediation cleanup of nuclear legacy sites. Such services capability includes: project investigation; radiological engineering; partial and total plant D&D; facility decontamination, dismantling, demolition, and planning; site restoration; logistics; transportation; and emergency response; and - A company owned equipment calibration and maintenance laboratory that services, maintains, calibrates, and sources (i.e., rental) health physics, IH and customized nuclear, environmental, and occupational safety and health (“NEOSH”) instrumentation. Our reporting segments exclude our corporate headquarters and our discontinued operations (see “Note 10 – Discontinued Operations”) which do not generate revenues. The table below presents certain financial information of our operating segments for the three months ended March 31, 2024, and 2023 (in thousands): Schedule of Segment Reporting Information Segment Reporting for the Quarter Ended March 31, 2024 (1) Treatment Services Segments Total Corporate (1) Consolidated Total Revenue from external customers $ 8,709 $ 4,908 $ 13,617 $ — $ 13,617 Intercompany revenues 45 16 61 — — Gross loss (52 ) (568 ) (620 ) — (620 ) Research and development 218 28 246 50 296 Interest income — — — 174 174 Interest expense (36 ) — (36 ) (80 ) (116 ) Interest expense-financing fees — — — (13 ) (13 ) Depreciation and amortization 366 44 410 21 431 Segment loss before income taxes (1,371 ) (1,388 ) (2,759 ) (1,655 ) (4,414 ) Income tax benefit (525 ) (431 ) (956 ) — (956 ) Segment loss (846 ) (957 ) (1,803 ) (1,655 ) (3,458 ) Expenditures for segment assets 160 84 244 — 244 (2) Segment Reporting for the Quarter Ended March 31, 2023 (1) Treatment Services Segments Total Corporate (1) Consolidated Total Revenue from external customers $ 9,594 $ 10,513 $ 20,107 $ — $ 20,107 Intercompany revenues 204 19 223 — — Gross profit 1,252 1,757 3,009 — 3,009 Research and development 67 3 70 29 99 Interest income — — — 127 127 Interest expense (22 ) (1 ) (23 ) (30 ) (53 ) Interest expense-financing fees — — — (20 ) (20 ) Depreciation and amortization 573 160 733 14 747 Segment income (loss) before income taxes 157 943 1,100 (1,622 ) (522 ) Income tax benefit (174 ) (30 ) (204 ) — (204 ) Segment income (loss) 331 973 1,304 (1,622 ) (318 ) Expenditures for segment assets 748 — 748 — 748 (2) (1) Amounts reflect the activity for corporate headquarters not included in the segment information. (2) Net of financed amount of $ 44,000 50,000

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2024
Income Tax Disclosure [Abstract]
Income Taxes	12. Income Taxes The Company uses an estimated annual effective tax rate, which is based on expected annual income, statutory tax rates and tax planning opportunities available in the various jurisdictions in which the Company operates, to determine its quarterly provision for income taxes. The Company had income tax benefits of approximately $ 956,000 204,000 21.7 39.1 The Organization for Economic Co-operation and Development (“OECD”) introduced Base Erosion and Profit Shifting (“BEPS”) Pillar 2 rules that impose a global minimum tax rate of 15% for multinational enterprises with annual global revenues exceeding €750 million. Numerous countries, including European Union member states, have enacted or are expected to enact legislation to be effective as early as January 1, 2024, with general implementation of a global minimum tax rate by January 1, 2025. The Company has evaluated the impact of these rules and currently believes they will not have any material impact on its financial results in 2024.

Variable Interest Entity (_VIE_

Variable Interest Entity (“VIE”)	3 Months Ended
	Mar. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Variable Interest Entity (“VIE”)	13. Variable Interest Entity (“VIE”) On December 18, 2023, the joint venture (“JV”) where the Company and Campoverde Srl (“JV partner”) each owns 50 50 The Company determines whether joint ventures in which it has invested are VIEs at the start of each new venture and when a reconsideration event has occurred. A VIE is a legal entity that satisfies any of the following characteristics: (a) the legal entity does not have sufficient equity investment at risk; (b) the equity investors at risk as a group, lack the characteristics of a controlling financial interest; or (c) the legal entity is structured with disproportionate voting rights. The Company consolidates a VIE if it is determined to be the primary beneficiary of the VIE. The primary beneficiary has both the power to direct the activities of the VIE that most significantly impact the entity’s economic performance and the obligation to absorb losses or the right to receive benefits from the VIE that could potentially be significant to the VIE. Based on the Company’s evaluation of this JV and the contractual terms of this arrangement, the Company determined that this JV is a VIE but the Company is not the primary beneficiary. Accordingly, no consolidation of this JV is required by the Company. No capital contributions have been or are expected to be made by either the Company or the JV partner under this JV.

Management Incentive Plans (_MI

Management Incentive Plans (“MIPs”)	3 Months Ended
	Mar. 31, 2024
Management Incentive Plans
Management Incentive Plans (“MIPs”)	14. Management Incentive Plans (“MIPs”) On January 18, 2024, the Board (with Mr. Mark Duff and Dr. Louis Centofanti abstaining) and the Compensation and Stock Option Committee (the “Compensation Committee”) approved individual MIP for the calendar year 2024 for each of the Company’s executive officers. Each MIP is effective January 1, 2024 and applicable for year 2024. Each MIP provides guidelines for the calculation of annual cash incentive-based compensation, subject to Compensation Committee oversight and modification. The performance compensation under each of the MIPs is based upon meeting certain of the Company’s separate target objectives during 2024. The total potential target performance compensation payable ranges from 25 150 104,287 625,733 29 100 95,681 332,811 25 100 69,337 277,346 25 100 71,317 285,267

Subsequent Events

Subsequent Events	3 Months Ended
	Mar. 31, 2024
Subsequent Events
Subsequent Events	15. Subsequent Events The Company evaluated subsequent events and transactions that occurred after the balance sheet date through May 9, 2024, the date that these consolidated financial statements were available to be issued. Based upon this review, the Company did not identify any subsequent events that would have required adjustment or disclosure in the consolidated financial statements other than the below. Credit Facility On May 8, 2024, the Company entered into an amendment to its Loan Agreement, as amended, with its lender which provided the following, among other things: ● removes the quarterly FCCR testing requirement for the first and second quarters of 2024; ● reinstates the quarterly FCCR testing requirement starting in the third quarter of 2024 and revises the methodology to be used in calculating the FCCR as follows (with no change to the minimum 1.15:1 ratio requirement): FCCR for the third quarter is to be determined based on financial results for the three-months period ending September 30, 2024; FCCR for the fourth quarter is to be determined based on financial results for the six-months period ending December 31, 2024; FCCR for the first quarter of 2025 is to be determined based on financial results for the nine-months period ending March 31, 2025; and FCCR for the second quarter of 2025 and each fiscal quarter thereafter is to be determined based on financial results for a trailing twelve-months period ending basis; ● requires maintenance of a daily minimum $ 2,250,000 3,000,000 ● in the event the Company is able to achieve its minimum quarterly FCCR requirement utilizing its financial results based on a trailing twelve-months period starting with the quarter ending June 30, 2024, the maintenance of a daily minimum borrowing availability requirement of $ 3,000,000 In connection with the amendment, we paid our lender a fee of $ 25,000

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2024
Accounting Policies [Abstract]
Recently Issued Accounting Standards – Not Yet Adopted	Recently Issued Accounting Standards – Not Yet Adopted In August 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023-05, “Business Combinations—Joint Venture Formations (Subtopic 805-60): Recognition and Initial Measurement.” ASU 2023-05 applies to the formation of a “joint venture” or a “corporate joint venture” and requires a joint venture to initially measure all contributions received upon its formation at fair value. The guidance does not impact accounting by the venturers. The new guidance is applicable to joint venture entities with a formation date on or after January 1, 2025 on a prospective basis. The Company is currently evaluating the impact of this ASU on its consolidated financial statements. In November 2023, the FASB issued ASU 2023-07, “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures,” which expands reportable segment disclosure requirements by requiring disclosures of significant reportable segment expenses that are regularly provided to the chief operating decision maker (“CODM”) and included within each reported measure of a segment’s profit or loss. The ASU also requires disclosure of the title and position of the individual identified as the CODM and an explanation of how the CODM uses the reported measures of a segment’s profit or loss in assessing segment performance and deciding how to allocate resources. Additionally, ASU 2023-07 requires all segment profit or loss and assets disclosures to be provided on an annual and interim basis. The amendments in this ASU are required to be adopted for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024 with early adoption permitted, and should be applied on a retrospective basis. ASU 2023-07 will be effective for the Company’s financial statements for the year ended December 31, 2024. This ASU will not have impact on the Company’s consolidated financial condition or results of operations. The Company is evaluating the impact to the related segment reporting disclosures. In December 2023, the FASB issued ASU No. 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures,” which modifies the rules on income tax disclosures to require entities to disclose (1) specific categories in the rate reconciliation, (2) the income or loss from continuing operations before income tax expense or benefit (separated between domestic and foreign) and (3) income tax expense or benefit from continuing operations (separated by federal, state and foreign). ASU 2023-09 also requires entities to disclose their income tax payments to international, federal, state and local jurisdictions, among other changes. The guidance is effective for annual periods beginning after December 15, 2024. ASU 2023-09 should be applied on a prospective basis, but retrospective application is permitted. This ASU will not have impact on the Company’s consolidated financial condition or results of operations. The Company is evaluating the impact to its income taxes reporting disclosures.

Revenue (Tables)

Revenue (Tables)	3 Months Ended
	Mar. 31, 2024
Revenue from Contract with Customer [Abstract]
Schedule of Disaggregation of Revenue	Schedule of Disaggregation of Revenue Revenue by Contract Type Treatment Services Total Treatment Services Total (In thousands) Three Months Ended Three Months Ended March 31, 2024 March 31, 2023 Treatment Services Total Treatment Services Total Fixed price $ 8,709 $ 4,314 $ 13,023 $ 9,594 $ 8,647 $ 18,241 Time and materials — 594 594 — 1,866 1,866 Total $ 8,709 $ 4,908 $ 13,617 $ 9,594 $ 10,513 $ 20,107 Revenue by generator Treatment Services Total Treatment Services Total (In thousands) Three Months Ended Three Months Ended March 31, 2024 March 31, 2023 Treatment Services Total Treatment Services Total Domestic government $ 5,761 $ 4,303 $ 10,064 $ 7,257 $ 9,718 $ 16,975 Domestic commercial 2,501 504 3,005 2,206 597 2,803 Foreign government — 79 79 95 177 272 Foreign commercial 447 22 469 36 21 57 Total $ 8,709 $ 4,908 $ 13,617 $ 9,594 $ 10,513 $ 20,107
Schedule of Contract Balances	The timing of revenue recognition and billings results in unbilled receivables (contract assets). The Company’s contract liabilities consist of deferred revenues which represent advance payment from customers in advance of the completion of our performance obligation. The following table represents changes in our contract asset and contract liabilities balances: Schedule of Contract Balances Year-to-date Year-to-date (In thousands) March 31, 2024 December 31, 2023 Change ($) Change (%) Contract assets Unbilled receivables - current $ 8,797 $ 8,432 $ 365 4.3 % Contract liabilities Deferred revenue $ 7,295 $ 6,815 $ 480 7.0 %

Leases (Tables)

Leases (Tables)	3 Months Ended
	Mar. 31, 2024
Leases
Schedule of Components of Lease Cost	The components of lease cost for the Company’s leases were as follows (in thousands): Schedule of Components of Lease Cost 2024 2023 Three Months Ended March 31, 2024 2023 Operating Lease: Lease cost $ 143 $ 156 Finance Leases: Amortization of ROU assets 65 38 Interst on lease liablity 22 6 Finance lease 87 44 Total lease cost $ 230 $ 200
Schedule of Weighted Average Lease	The weighted average remaining lease term and the weighted average discount rate for operating and finance leases at March 31, 2024 were: Schedule of Weighted Average Lease Operating Leases Finance Leases Weighted average remaining lease terms (years) 5.4 4.3 Weighted average discount rate 7.6 % 8.8 % The weighted average remaining lease term and the weighted average discount rate for operating and finance leases at March 31, 2023 were: Operating Leases Finance Leases Weighted average remaining lease terms (years) 6.1 3.0 Weighted average discount rate 7.8 % 5.5 %
Schedule of Operating and Finance Lease Liability Maturity	The following table reconciles the undiscounted cash flows for the operating and finance leases at March 31, 2024, to the operating and finance lease liabilities recorded on the balance sheet (in thousands): Schedule of Operating and Finance Lease Liability Maturity Operating Leases Finance Leases 2024 $ 372 $ 275 2025 433 345 2026 416 192 2027 406 157 2028 383 134 2029 and thereafter 366 102 Total undiscounted lease payments 2,376 1,205 Less: Imputed interest (436 ) (212 ) Present value of lease payments $ 1,940 $ 993 Current portion of operating lease obligations $ 346 $ — Long-term operating lease obligations, less current portion $ 1,594 $ — Current portion of finance lease obligations $ — $ 287 Long-term finance lease obligations, less current portion $ — $ 706
Schedule of Supplemental Cash Flow and Other Information Related to Leases	Supplemental cash flow and other information related to our leases were as follows (in thousands): Schedule of Supplemental Cash Flow and Other Information Related to Leases 2024 2023 Three Months Ended March 31, 2024 2023 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flow from operating leases $ 147 $ 144 Operating cash flow from finance leases $ 22 $ 6 Financing cash flow from finance leases $ 75 $ 41 ROU assets obtained in exchange for lease obligations for: Finance liabilities $ — $ 50

Intangible Assets (Tables)

Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Definite Lived Intangible Assets	The following table summarizes information relating to the Company’s definite-lived intangible assets: Schedule of Definite Lived Intangible Assets March 31, 2024 December 31, 2023 Weighted Average Gross Net Gross Net Amortization Period Carrying Accumulated Carrying Carrying Accumulated Carrying (Years) Amount Amortization Amount Amount Amortization Amount Other Intangibles (amount in thousands) Patents 8.3 $ 710 $ (390 ) $ 320 $ 710 $ (387 ) $ 323 Software 3 673 (551 ) 122 667 (529 ) 138 Total $ 1,383 $ (941 ) $ 442 $ 1,377 $ (916 ) $ 461
Schedule of Finite Lived Intangible Assets, Future Amortization Expense	The following table summarizes the expected amortization over the next five years for our definite-lived intangible assets: Schedule of Finite Lived Intangible Assets, Future Amortization Expense Amount Year (In thousands) 2024 (Remaining) $ 58 2025 45 2026 40 2027 22 2028 13

Capital Stock, Stock Plans, W_2

Capital Stock, Stock Plans, Warrants and Stock Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2024
Share-Based Payment Arrangement [Abstract]
Schedule of Share-based Compensation, Allocation of Recognized Period Costs	The following table summarizes stock-based compensation recognized for the three months ended March 31, 2024, and 2023 for our employee and director stock options. Schedule of Share-based Compensation, Allocation of Recognized Period Costs 2024 2023 Three Months Ended Stock Options March 31, 2024 2023 Employee Stock Options $ 91,000 $ 86,000 Director Stock Options 61,000 32,000 Total $ 152,000 $ 118,000
Schedule of Stock Options Roll Forward	The summary of the Company’s total Stock Option Plans as of March 31, 2024 and March 31, 2023, and changes during the periods then ended, are presented below. The Company’s Plans consist of the 2017 Plan and the 2003 Outside Directors Stock Plan (the “2003 Plan”): Schedule of Stock Options Roll Forward Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term (years) Aggregate Intrinsic Value (4) Options outstanding January 1, 2024 994,500 $ 5.57 - Granted 45,000 $ 7.75 Exercised (43,500 ) $ 5.61 $ 212,410 Forfeited (11,000 ) $ 7.01 Options outstanding end of period (1) 985,000 $ 5.66 4.8 $ 6,139,346 Options exercisable at March 31, 2024 (2) 350,300 $ 5.06 3.8 $ 2,391,576 Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term (years) Aggregate Intrinsic Value (4) Options outstanding January 1, 2023 1,018,400 $ 5.02 - Granted 295,000 $ 3.95 Exercised (44,400 ) $ 3.56 $ 370,196 Forfeited/expired (4,500 ) $ 3.90 Options outstanding end of period (3) 1,264,500 $ 4.83 4.2 $ 8,791,279 Options exercisable at March 31, 2023 (3) 499,500 $ 4.30 2.3 $ 6,047,029 (1) Options with exercise prices ranging from $ 3.15 9.81 (2) Options with exercise prices ranging from $ 3.15 7.50 (3) Options with exercise prices ranging from $ 2.79 7.50 (4) The intrinsic value of a stock option is the amount by which the market value of the underlying stock

Loss Per Share (Tables)

Loss Per Share (Tables)	3 Months Ended
	Mar. 31, 2024
Earnings Per Share [Abstract]
Schedule of Earnings Per Share	Schedule of Earnings Per Share Three Months Ended (Unaudited) March 31, (Amounts in Thousands, Except for Per Share Amounts) 2024 2023 Loss per common share from continuing operations Loss from continuing operations, net of taxes $ (3,458 ) $ (318 ) Basic and diluted loss per share $ (.25 ) $ (.02 ) Loss per common share from discontinued operations, net of taxes Loss from discontinued operations, net of taxes $ (102 ) $ (93 ) Basic and diluted loss per share $ (.01 ) $ (.01 ) Net loss per common share Net loss $ (3,560 ) $ (411 ) Basic and diluted loss per share $ (.26 ) $ (.03 ) Weighted average shares outstanding: Basic weighted average shares outstanding 13,676 13,358 Add: dilutive effect of stock options — — Diluted weighted average shares outstanding 13,676 13,358 Potential shares excluded from above weighted average share calculations due to their anti-dilutive effect include: Stock options 75 335

Long Term Debt (Tables)

Long Term Debt (Tables)	3 Months Ended
	Mar. 31, 2024
Debt Disclosure [Abstract]
Schedule of Long Term Debt	Long-term debt consists of the following as of March 31, 2024, and December 31, 2023: Schedule of Long Term Debt (Amounts in Thousands) March 31, 2024 December 31, 2023 Revolving Credit (1) $ — $ — Revolving Credit May 15, 2027 10.5 (1) $ — $ — Term Loan 1 May 15, 2027 10.2 (1) 107 213 Term Loan 2 May 15, 2027 9.5 (1) 2,208 2,333 Capital Line May 15, 2027 9.0 (1) 332 358 Debt Issuance Costs (158 ) (2) (170 ) (2) Notes Payable up 10.7 9.1 57 14 Total debt 2,546 2,748 Less current portion of long-term debt 673 773 Long-term debt $ 1,873 $ 1,975 (1) Our revolving credit facility is collateralized by our accounts receivable, and our term loans and capital line are collateralized by our property, plant, and equipment. (2) Aggregate unamortized debt issuance costs in connection with the Company’s credit facility, which consists of the revolving credit, Term loan 1, Term loan 2 and Capital Line, as applicable.

Discontinued Operations (Tables

Discontinued Operations (Tables)	3 Months Ended
	Mar. 31, 2024
Discontinued Operations and Disposal Groups [Abstract]
Schedule of Disposal Groups, Including Discontinued Operation Balance Sheet	The following table presents the major class of assets of discontinued operations as of March 31, 2024, and December 31, 2023. No assets and liabilities were held for sale at each of the periods noted. Schedule of Disposal Groups, Including Discontinued Operation Balance Sheet March 31, December 31, (Amounts in Thousands) 2024 2023 Current assets Other assets $ 13 $ 13 Total current assets 13 13 Long-term assets Property, plant and equipment, net (1) 81 81 Total long-term assets 81 81 Total assets $ 94 $ 94 Current liabilities Accounts payable $ 94 $ 80 Accrued expenses and other liabilities 128 128 Environmental liabilities 16 61 Total current liabilities 238 269 Long-term liabilities Closure liabilities 171 169 Environmental liabilities 784 784 Total long-term liabilities 955 953 Total liabilities $ 1,193 $ 1,222 (1) net of accumulated depreciation of $ 10,000

Operating Segments (Tables)

Operating Segments (Tables)	3 Months Ended
	Mar. 31, 2024
Segment Reporting [Abstract]
Schedule of Segment Reporting Information	Schedule of Segment Reporting Information Segment Reporting for the Quarter Ended March 31, 2024 (1) Treatment Services Segments Total Corporate (1) Consolidated Total Revenue from external customers $ 8,709 $ 4,908 $ 13,617 $ — $ 13,617 Intercompany revenues 45 16 61 — — Gross loss (52 ) (568 ) (620 ) — (620 ) Research and development 218 28 246 50 296 Interest income — — — 174 174 Interest expense (36 ) — (36 ) (80 ) (116 ) Interest expense-financing fees — — — (13 ) (13 ) Depreciation and amortization 366 44 410 21 431 Segment loss before income taxes (1,371 ) (1,388 ) (2,759 ) (1,655 ) (4,414 ) Income tax benefit (525 ) (431 ) (956 ) — (956 ) Segment loss (846 ) (957 ) (1,803 ) (1,655 ) (3,458 ) Expenditures for segment assets 160 84 244 — 244 (2) Segment Reporting for the Quarter Ended March 31, 2023 (1) Treatment Services Segments Total Corporate (1) Consolidated Total Revenue from external customers $ 9,594 $ 10,513 $ 20,107 $ — $ 20,107 Intercompany revenues 204 19 223 — — Gross profit 1,252 1,757 3,009 — 3,009 Research and development 67 3 70 29 99 Interest income — — — 127 127 Interest expense (22 ) (1 ) (23 ) (30 ) (53 ) Interest expense-financing fees — — — (20 ) (20 ) Depreciation and amortization 573 160 733 14 747 Segment income (loss) before income taxes 157 943 1,100 (1,622 ) (522 ) Income tax benefit (174 ) (30 ) (204 ) — (204 ) Segment income (loss) 331 973 1,304 (1,622 ) (318 ) Expenditures for segment assets 748 — 748 — 748 (2) (1) Amounts reflect the activity for corporate headquarters not included in the segment information. (2) Net of financed amount of $ 44,000 50,000

Basis of Presentation (Details

Basis of Presentation (Details Narrative) - USD ($)	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Accounting Policies [Abstract]
[custom:WasteTreatmentBacklog-0]	$ 10,580,000	$ 8,702,000
[custom:IncreaseDecreaseInWasteTreatmentBacklog]	$ 1,878,000

Schedule of Disaggregation of R

Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Total	$ 13,617	$ 20,107
Domestic Government [Member]
Total	10,064	16,975
Domestic Commercial [Member]
Total	3,005	2,803
Foreign Government [Member]
Total	79	272
Foreign Commercial [Member]
Total	469	57
Fixed Price [Member]
Total	13,023	18,241
Time and Materials [Member]
Total	594	1,866
Treatment [Member]
Total	8,709	9,594
Treatment [Member] | Domestic Government [Member]
Total	5,761	7,257
Treatment [Member] | Domestic Commercial [Member]
Total	2,501	2,206
Treatment [Member] | Foreign Government [Member]
Total		95
Treatment [Member] | Foreign Commercial [Member]
Total	447	36
Treatment [Member] | Fixed Price [Member]
Total	8,709	9,594
Treatment [Member] | Time and Materials [Member]
Total
Services [Member]
Total	4,908	10,513
Services [Member] | Domestic Government [Member]
Total	4,303	9,718
Services [Member] | Domestic Commercial [Member]
Total	504	597
Services [Member] | Foreign Government [Member]
Total	79	177
Services [Member] | Foreign Commercial [Member]
Total	22	21
Services [Member] | Fixed Price [Member]
Total	4,314	8,647
Services [Member] | Time and Materials [Member]
Total	$ 594	$ 1,866

Schedule of Contract Balances (

Schedule of Contract Balances (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Unbilled receivables - current	$ 8,797		$ 8,432
Changes in unbilled receivables - current	365	$ 639
Deferred revenue	7,295		$ 6,815
Year to Date Changes [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Changes in unbilled receivables - current	$ 365
Changes in unbilled receivables - current, percentage	4.30%
Changes in deferred revenue	$ 480
Changes in deferred revenue, percentage	7%

Revenue (Details Narrative)

Revenue (Details Narrative) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenue from Contract with Customer [Abstract]
Revenue recognized	$ 3,165,000	$ 3,494,000

Schedule of Components of Lease

Schedule of Components of Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Leases
Lease cost	$ 143	$ 156
Amortization of ROU assets	65	38
Interst on lease liablity	22	6
Finance lease	87	44
Total lease cost	$ 230	$ 200

Schedule of Weighted Average Le

Schedule of Weighted Average Lease (Details)	Mar. 31, 2024	Mar. 31, 2023
Leases
Operating leases, weighted average remaining lease terms (years)	5 years 4 months 24 days	6 years 1 month 6 days
Finance leases, weighted average remaining lease terms (years)	4 years 3 months 18 days	3 years
Operating leases, weighted average discount rate	7.60%	7.80%
Finance leases, weighted average discount rate	8.80%	5.50%

Schedule of Operating and Finan

Schedule of Operating and Finance Lease Liability Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Operating Leases
2024	$ 372
2025	433
2026	416
2027	406
2028	383
2029 and thereafter	366
Total undiscounted lease payments	2,376
Less: Imputed interest	(436)
Present value of lease payments	1,940
Current portion of operating lease obligations	346	$ 380
Current portion of operating lease obligations	1,594	1,670
Finance Leases
2024	275
2025	345
2026	192
2027	157
2028	134
2029 and thereafter	102
Total undiscounted lease payments	1,205
Less: Imputed interest	(212)
Present value of lease payments	993
Finance Lease, Liability, Current	287	291
Finance Lease, Liability, Noncurrent	$ 706	$ 776

Schedule of Supplemental Cash F

Schedule of Supplemental Cash Flow and Other Information Related to Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Leases
Operating cash flow from operating leases	$ 147	$ 144
Operating cash flow from finance leases	22	6
Financing cash flow from finance leases	75	41
Finance liabilities		$ 50

Schedule of Definite Lived Inta

Schedule of Definite Lived Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 1,383	$ 1,377
Accumulated Amortization	(941)	(916)
Net Carrying Amount	$ 442	461
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Remaining Amortization Period	8 years 3 months 18 days
Gross Carrying Amount	$ 710	710
Accumulated Amortization	(390)	(387)
Net Carrying Amount	$ 320	323
Software [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Remaining Amortization Period	3 years
Gross Carrying Amount	$ 673	667
Accumulated Amortization	(551)	(529)
Net Carrying Amount	$ 122	$ 138

Schedule of Finite Lived Intang

Schedule of Finite Lived Intangible Assets, Future Amortization Expense (Details) $ in Thousands	Mar. 31, 2024 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2024 (Remaining)	$ 58
2025	45
2026	40
2027	22
2028	$ 13

Intangible Assets (Details Narr

Intangible Assets (Details Narrative) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of intangible asset	$ 25,000	$ 55,000

Schedule of Share-based Compens

Schedule of Share-based Compensation, Allocation of Recognized Period Costs (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Total	$ 152,000	$ 118,000
Share-Based Payment Arrangement, Option [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Total	91,000	86,000
Director Stock Options [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Total	$ 61,000	$ 32,000

Schedule of Stock Options Roll

Schedule of Stock Options Roll Forward (Details) - Equity Option [Member] - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
		Mar. 31, 2024		Mar. 31, 2023
Marketable Securities [Line Items]
Options Shares Outstanding, Beginning		994,500		1,018,400
Options Weighted Average Exercise Price Outstanding, Beginning		$ 5.57		$ 5.02
Options Aggregate Intrinsic Value Outstanding, Beginning	[1]
Options Shares, Granted		45,000		295,000
Options Weighted Average Exercise Price, Granted		$ 7.75		$ 3.95
Options Shares, Exercised		(43,500)		(44,400)
Options Weighted Average Exercise Price, Exercised		$ 5.61		$ 3.56
Options Aggregate Intrinsic Value, Exercised		$ 212,410	[2]	$ 370,196	[1]
Options Shares, Forfeited/expired		(11,000)		(4,500)
Options Weighted Average Exercise Price, Forfeited/expired		$ 7.01		$ 3.90
Options Shares Outstanding, Ending		985,000	[3]	1,264,500	[4]
Options Weighted Average Exercise Price Outstanding, Ending		$ 5.66	[3]	$ 4.83	[4]
Options Weighted Average Remaining Contractual Term (years) Outstanding		4 years 9 months 18 days	[3]	4 years 2 months 12 days	[4]
Options Aggregate Intrinsic Value Outstanding, Ending		$ 6,139,346	[2],[3]	$ 8,791,279	[1],[4]
Options Shares, Exercisable		350,300	[2]	499,500	[4]
Options Weighted Average Exercise Price, Exercisable		$ 5.06	[2]	$ 4.30	[4]
Options Weighted Average Remaining Contractual Term (years) Exercisable		3 years 9 months 18 days	[2]	2 years 3 months 18 days	[4]
Options Aggregate Intrinsic Value, Exercisable	[1]	$ 2,391,576	[2]	$ 6,047,029	[4]
[1]The intrinsic value of a stock option is the amount by which the market value of the underlying stock[2]Options with exercise prices ranging from $ 3.15 7.50 3.15 9.81 2.79 7.50

Schedule of Stock Options Rol_2

Schedule of Stock Options Roll Forward (Details) (Parenthetical)	12 Months Ended
	Dec. 31, 2023 $ / shares
Stock Option Outstanding One [Member]
Marketable Securities [Line Items]
Share-based payment arrangement, option, exercise price range, lower range limit	$ 3.15
Share-based payment arrangement, option, exercise price range, upper range limit	9.81
Stock Option Outstanding Two [Member]
Marketable Securities [Line Items]
Share-based payment arrangement, option, exercise price range, lower range limit	3.15
Share-based payment arrangement, option, exercise price range, upper range limit	7.50
Stock Option Outstanding Three [Member]
Marketable Securities [Line Items]
Share-based payment arrangement, option, exercise price range, lower range limit	2.79
Share-based payment arrangement, option, exercise price range, upper range limit	$ 7.50

Capital Stock, Stock Plans, W_3

Capital Stock, Stock Plans, Warrants and Stock Based Compensation (Details Narrative) - USD ($)			3 Months Ended
	Mar. 22, 2024	Jan. 18, 2024	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023	Apr. 01, 2019
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Common stock, par value			$ 0.001		$ 0.001
Proceeds from stock options exercised			$ 209,000	$ 7,000
Common Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of shares issued from option exercise			12,916
Number of option exercised			25,000
Common Stock [Member] | Share-Based Payment Arrangement, Option [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of shares issued from option exercise			18,500
Number of option exercised			18,500
Proceeds from stock options exercised			$ 104,000
Common Stock [Member] | Minimum [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock options, exercise price			$ 3.15
Common Stock [Member] | Minimum [Member] | Share-Based Payment Arrangement, Option [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock options, exercise price			3.95
Common Stock [Member] | Maximum [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock options, exercise price			7.005
Common Stock [Member] | Maximum [Member] | Share-Based Payment Arrangement, Option [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock options, exercise price			$ 7.005
Employee and Directors [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Unrecognized compensation cost related to unvested options consultant			$ 1,823,000
Weighted average term for unrecognized and unvested option to be recognized			3 years 2 months 12 days
Robert Ferguson [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Loans payable						$ 2,500,000
Warrants exercise price						$ 3.51
Robert Ferguson [Member] | Maximum [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Warrant to purchase						60,000
Robert Ferguson Heir Two [Member] | Maximum [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Warrant to purchase						30,000
Robert Ferguson Heir [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Warrant to purchase	30,000
Proceeds from warrant exercised	$ 105,000
2003 Outside Directors Stock Option Plan [Member] | Common Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock issued during period for services, shares			14,963
2003 Outside Directors Stock Plan [Member] | Portion of Director Fee Earned in Common Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Allocated share-based compensation expense			$ 118,000
Incentive Stock Option Agreement [Member] | 2017 Stock Option Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Shares options granted		45,000
Common stock, par value		$ 0.001
Weighted average contractual term (years) outstanding		6 years
Vesting, description		one-fifth vesting annually over a five-year period
Stock options, exercise price		$ 7.75

Schedule of Earnings Per Share

Schedule of Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Loss per common share from continuing operations
Loss from continuing operations, net of taxes	$ (3,458,000)	$ (318,000)
Basic income (loss) per share	$ (0.25)	$ (0.02)
Diluted income (loss) per share	$ (0.25)	$ (0.02)
Loss per common share from discontinued operations, net of taxes
Loss from discontinued operations, net of taxes	$ (102,000)	$ (93,000)
Basic loss per share	$ (0.01)	$ (0.01)
Diluted loss per share	$ (0.01)	$ (0.01)
Net loss per common share
Net loss	$ (3,560,000)	$ (411,000)
Basic income (loss) per share	$ (0.26)	$ (0.03)
Diluted income (loss) per share	$ (0.26)	$ (0.03)
Weighted average shares outstanding:
Basic weighted average shares outstanding	13,676	13,358
Add: dilutive effect of stock options
Diluted weighted average shares outstanding	13,676	13,358
Share-Based Payment Arrangement, Option [Member]
Potential shares excluded from above weighted average share calculations due to their anti-dilutive effect include:
Stock options	75	335

Schedule of Long Term Debt (Det

Schedule of Long Term Debt (Details) - USD ($) $ in Thousands		Mar. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net	[1]	$ (158)	$ (170)
Total debt		2,546	2,748
Less current portion of long-term debt		673	773
Long-term debt		1,873	1,975
Revolving Credit [Member]
Debt Instrument [Line Items]
Total debt	[2]
Term Loan One [Member]
Debt Instrument [Line Items]
Total debt	[2]	107	213
Term Loan Two [Member]
Debt Instrument [Line Items]
Total debt	[2]	2,208	2,333
Captail Line [Member]
Debt Instrument [Line Items]
Total debt	[2]	332	358
Notes Payable [Member]
Debt Instrument [Line Items]
Total debt	[2]	$ 57	$ 14
[1]Aggregate unamortized debt issuance costs in connection with the Company’s credit facility, which consists of the revolving credit, Term loan 1, Term loan 2 and Capital Line, as applicable.[2]Our revolving credit facility is collateralized by our accounts receivable, and our term loans and capital line are collateralized by our property, plant, and equipment.

Schedule of Long Term Debt (D_2

Schedule of Long Term Debt (Details) (Parenthetical)	Jul. 31, 2023	May 04, 2021	May 08, 2020	Mar. 31, 2024	Dec. 31, 2023
Revolving Credit [Member]
Debt Instrument [Line Items]
Debt due date			May 15, 2027
Effective interest rate				10.50%
Term Loan One [Member]
Debt Instrument [Line Items]
Debt due date			May 15, 2027
Effective interest rate				10.20%
Term Loan Two [Member]
Debt Instrument [Line Items]
Debt due date	May 15, 2027
Effective interest rate				9.50%
Capital Line [Member]
Debt Instrument [Line Items]
Debt due date		May 15, 2027
Effective interest rate				9%
Note Payable [Member]
Debt Instrument [Line Items]
Effective interest rate				10.70%	9.10%

Long Term Debt (Details Narrati

Long Term Debt (Details Narrative) - USD ($)				3 Months Ended
	Jul. 31, 2023	Jun. 01, 2022	May 08, 2020	Mar. 31, 2024	May 04, 2022	May 04, 2021
Line of Credit Facility [Line Items]
Debt instrument, borrowing capacity capital line, amount						$ 1,000,000
Debt instrument, interest rate description				Pursuant to the Loan Agreement, as amended, payments of annual interest rates are as follows: (i) interest due on the revolving credit is at prime (8.50% at March 31, 2024) plus 2% or Secured Overnight Finance Rate (“SOFR”) (as defined in the Loan Agreement, as amended) plus 3.00% plus an SOFR Adjustment applicable for an interest period selected by the Company; (ii) interest due on each Term Loan 1 and the Capital Line is at prime plus 2.50% or SOFR plus 3.50% plus an SOFR Adjustment applicable for an interest period selected by the Company; and (iii) interest due on Term Loan 2 is at prime plus 3% or SOFR plus 4.00% plus an SOFR Adjustment applicable for an interest period selected by the Company. SOFR Adjustment rates of 0.10% and 0.15% are applicable for a one-month interest period and three-month period, respectively, that may be selected by the Company.
Letters of credit outstanding, amount				$ 3,950,000
PNC Bank [Member] | Captail Line [Member]
Line of Credit Facility [Line Items]
Debt instrument carrying amount					$ 524,000
Debt instrument periodic payment		$ 8,700
Loan Agreement [Member] | PNC Bank [Member] | Term Loan One [Member]
Line of Credit Facility [Line Items]
Debt instrument carrying amount			$ 1,742,000
Debt instrument periodic payment			35,547
Loan Agreement [Member] | PNC Bank [Member] | Term Loan Two [Member]
Line of Credit Facility [Line Items]
Debt instrument carrying amount			2,500,000
Debt instrument periodic payment			$ 41,667
Amended Loan Agreement [Member]
Line of Credit Facility [Line Items]
Debt instrument, description	The Company agreed to pay PNC 1.0% of the total financing under the Loan Agreement, as amended, in the event the Company pays off its obligations on or before July 31, 2024, and 0.5% of the total financing if the Company pays off its obligations after July 31, 2024, to and including July 31, 2025. No early termination fee shall apply if the Company pays off its obligations under Loan Agreement, as amended, after July 31, 2025
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity				2,379,000
Letters of credit outstanding, amount				3,950,000
Reduction, borrowing availability				$ 750,000
Revolving Credit Facility [Member] | Loan Agreement [Member] | PNC Bank [Member]
Line of Credit Facility [Line Items]
Debt instrument maturity date			May 15, 2027
Line of credit facility, maximum borrowing capacity			$ 12,500,000

Commitments and Contingencies (

Commitments and Contingencies (Details Narrative) - USD ($)	1 Months Ended	3 Months Ended		12 Months Ended
	Jun. 30, 2003	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Self-insured retention		$ 100,000
Restricted cash, noncurrent		12,222,000		$ 12,074,000
Interest income		174,000	$ 127,000
Letters of credit outstanding, amount		3,950,000
Bond outstanding		26,747,000
American International Group, Inc [Member]
Defined Benefit Plan Disclosure [Line Items]
Period of finite risk insurance policy	25 years
Maximum allowable coverage of insurance policy		28,177,000
Coverage amount under the policy		23,376,000
Restricted cash, noncurrent		12,222,000		12,074,000
Interest income		$ 148,000	$ 67,000
Insurers obligation to entity on termination of contract		100%
American International Group, Inc [Member] | Finite Risk Sinking Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest income		$ 2,751,000		2,603,000
Canadian Nuclear Laboratories LTD [Member]
Defined Benefit Plan Disclosure [Line Items]
Outstanding receivables		$ 1,612,000		$ 2,389,000

Schedule of Disposal Groups, In

Schedule of Disposal Groups, Including Discontinued Operation Balance Sheet (Details) - USD ($) $ in Thousands		Mar. 31, 2024	Dec. 31, 2023
Current assets
Other assets		$ 13	$ 13
Total current assets		13	13
Long-term assets
Property, plant and equipment, net	[1]	81	81
Total long-term assets		81	81
Total assets		94	94
Current liabilities
Accounts payable		94	80
Accrued expenses and other liabilities		128	128
Environmental liabilities		16	61
Total current liabilities		238	269
Long-term liabilities
Closure liabilities		171	169
Environmental liabilities		784	784
Total long-term liabilities		955	953
Total liabilities		$ 1,193	$ 1,222
[1]net of accumulated depreciation of $ 10,000

Schedule of Disposal Groups, _2

Schedule of Disposal Groups, Including Discontinued Operation Balance Sheet (Details) (Parenthetical) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Discontinued Operations and Disposal Groups [Abstract]
Accumulated depreciation	$ 10,000	$ 10,000

Discontinued Operations (Detail

Discontinued Operations (Details Narrative) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Discontinued Operations and Disposal Groups [Abstract]
Income from discontinued operations (net of taxes)	$ 102,000	$ 93,000
Net of tax benefit	$ 29,000	$ 30,000

Schedule of Segment Reporting I

Schedule of Segment Reporting Information (Details) - USD ($)		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023
Segment Reporting Information [Line Items]
Revenue from external customers		$ 13,617,000	$ 20,107,000
Intercompany revenues
Gross profit		(620,000)	3,009,000
Research and development		296,000	99,000
Interest income		174,000	127,000
Interest expense		(116,000)	(53,000)
Interest expense-financing fees		(13,000)	(20,000)
Depreciation and amortization		431,000	747,000
Segment income (loss) before income taxes		(4,414,000)	(522,000)
Income tax benefit		(956,000)	(204,000)
Segment income (loss)		(3,458,000)	(318,000)
Expenditures for segment assets	[1]	244,000	748,000
Treatment [Member]
Segment Reporting Information [Line Items]
Revenue from external customers		8,709,000	9,594,000
Services [Member]
Segment Reporting Information [Line Items]
Revenue from external customers		4,908,000	10,513,000
Operating Segments [Member] | Treatment [Member]
Segment Reporting Information [Line Items]
Revenue from external customers		8,709,000	9,594,000
Intercompany revenues		45,000	204,000
Gross profit		(52,000)	1,252,000
Research and development		218,000	67,000
Interest income
Interest expense		(36,000)	(22,000)
Interest expense-financing fees
Depreciation and amortization		366,000	573,000
Segment income (loss) before income taxes		(1,371,000)	157,000
Income tax benefit		(525,000)	(174,000)
Segment income (loss)		(846,000)	331,000
Expenditures for segment assets		160,000	748,000
Operating Segments [Member] | Services [Member]
Segment Reporting Information [Line Items]
Revenue from external customers		4,908,000	10,513,000
Intercompany revenues		16,000	19,000
Gross profit		(568,000)	1,757,000
Research and development		28,000	3,000
Interest income
Interest expense			(1,000)
Interest expense-financing fees
Depreciation and amortization		44,000	160,000
Segment income (loss) before income taxes		(1,388,000)	943,000
Income tax benefit		(431,000)	(30,000)
Segment income (loss)		(957,000)	973,000
Expenditures for segment assets		84,000
Operating Segments [Member] | Segments Total [Member]
Segment Reporting Information [Line Items]
Revenue from external customers		13,617,000	20,107,000
Intercompany revenues		61,000	223,000
Gross profit		(620,000)	3,009,000
Research and development		246,000	70,000
Interest income
Interest expense		(36,000)	(23,000)
Interest expense-financing fees
Depreciation and amortization		410,000	733,000
Segment income (loss) before income taxes		(2,759,000)	1,100,000
Income tax benefit		(956,000)	(204,000)
Segment income (loss)		(1,803,000)	1,304,000
Expenditures for segment assets		244,000	748,000
Intersegment Eliminations [Member] | Corporate Segment and Other Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenue from external customers	[2]
Intercompany revenues	[2]
Gross profit	[2]
Research and development	[2]	50,000	29,000
Interest income	[2]	174,000	127,000
Interest expense	[2]	(80,000)	(30,000)
Interest expense-financing fees	[2]	(13,000)	(20,000)
Depreciation and amortization	[2]	21,000	14,000
Segment income (loss) before income taxes	[2]	(1,655,000)	(1,622,000)
Income tax benefit	[2]
Segment income (loss)	[2]	(1,655,000)	(1,622,000)
Expenditures for segment assets	[2]
[1]Net of financed amount of $ 44,000 50,000

Schedule of Segment Reporting_2

Schedule of Segment Reporting Information (Details) (Parenthetical) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting [Abstract]
Financed portion amount in the purchase of capital expenditure	$ 44,000	$ 50,000

Income Taxes (Details Narrative

Income Taxes (Details Narrative) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Income Tax Disclosure [Abstract]
Income tax expense (benefit)	$ 956,000	$ 204,000
Effective income tax rates	21.70%	39.10%
Income tax examination description	The Organization for Economic Co-operation and Development (“OECD”) introduced Base Erosion and Profit Shifting (“BEPS”) Pillar 2 rules that impose a global minimum tax rate of 15% for multinational enterprises with annual global revenues exceeding €750 million. Numerous countries, including European Union member states, have enacted or are expected to enact legislation to be effective as early as January 1, 2024, with general implementation of a global minimum tax rate by January 1, 2025. The Company has evaluated the impact of these rules and currently believes they will not have any material impact on its financial results in 2024.

Variable Interest Entity (_VI_2

Variable Interest Entity (“VIE”) (Details Narrative) - Campoverde Srl [Member] - Joint Venture [Member] € in Millions	Dec. 18, 2023 EUR (€)
Ownership percentage	50%
Contract value	€ 50

Management Incentive Plans (__2

Management Incentive Plans (“MIPs”) (Details Narrative)	3 Months Ended
	Mar. 31, 2024 USD ($)
Chief Executive Officer [Member]
Compensation arrangement with individual, cash awards, minimum, percentage	25%
Compensation arrangement with individual, cash awards, maximum, percentage	150%
Compensation arrangement with individual, cash awards, minimum, amount	$ 104,287
Compensation arrangement with individual, cash awards, maximum, amount	$ 625,733
Chief Financial Officer [Member]
Compensation arrangement with individual, cash awards, minimum, percentage	29%
Compensation arrangement with individual, cash awards, maximum, percentage	100%
Compensation arrangement with individual, cash awards, minimum, amount	$ 95,681
Compensation arrangement with individual, cash awards, maximum, amount	$ 332,811
Executive Vice President of Strategic Initiatives [Member]
Compensation arrangement with individual, cash awards, minimum, percentage	25%
Compensation arrangement with individual, cash awards, maximum, percentage	100%
Compensation arrangement with individual, cash awards, minimum, amount	$ 69,337
Compensation arrangement with individual, cash awards, maximum, amount	$ 277,346
Executive Vice President of Waste Treatment Operations [Member]
Compensation arrangement with individual, cash awards, minimum, percentage	25%
Compensation arrangement with individual, cash awards, maximum, percentage	100%
Compensation arrangement with individual, cash awards, minimum, amount	$ 71,317
Compensation arrangement with individual, cash awards, maximum, amount	$ 285,267

Subsequent Events (Details Narr

Subsequent Events (Details Narrative) - Subsequent Event [Member]	May 08, 2024 USD ($)
Lender [Member]
Debt instrument, fee amount	$ 25,000
Minimum [Member]
Line of credit facility remaining borrowing capacity	3,000,000
Minimum [Member] | Through June 29, 2024 [Member]
Line of credit facility remaining borrowing capacity	2,250,000
Minimum [Member] | June 30, 2024, through June 29, 2025 [Member]
Line of credit facility remaining borrowing capacity	$ 3,000,000