Basis of Presentation	6 Months Ended
Jun. 30, 2026
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 SEC. Certain information and note disclosures normally included in financial statements prepared in accordance with 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 six months ended June 30, 2026, are not necessarily indicative of results to be expected for the fiscal year ending December 31, 2026. 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, 2025. The condensed consolidated financial statements include the accounts of our wholly-owned subsidiaries. Financial Position and Liquidity These condensed consolidated financial statements have been prepared in accordance with U.S. GAAP assuming the Company will continue as a going concern. The going concern assumption contemplates the realization of assets and the satisfaction of liabilities in the normal course of business. The Company incurred losses from continuing operations before tax of $15,134,000 during 2024, $10,665,000 during 2025, and $13,637,000 during the first six months of 2026. The Company also experienced cash used in continuing operations of $14,146,000 during 2024, $10,311,000 during 2025, and $8,769,000 during the first six months of 2026. These results were due in part to delays in the enactment of federal appropriations and Congress’s continued use of CRs, as well as increased investments in PFAS technology, expansion of treatment capacity, workforce growth, and infrastructure enhancements intended to support anticipated waste treatment volumes, including anticipated Hanford-related waste volumes. In addition, for 2026 year to date, delays in the commencement of several new projects within our Services Segment, processing delays due to customer-directed changes in treatment protocols and the continued processing of previously stored waste inventories to prepare for anticipated increases in certain Hanford-related waste volumes negatively impacted our revenues during the quarter. Certain of these previously stored waste inventories carried lower margins, which adversely affected our results of operations. These lower-margin previously stored waste inventories have now been substantially processed and are not expected to have a material effect on operating results during the next twelve months. The Company’s expected cash requirements over the next twelve months include working capital needs, scheduled principal payments on debt, costs associated with the administration and monitoring of discontinued operations, R&D expenditures related to PFAS technology, and capital expenditures. A significant portion of the projected revenues and cash flows underlying management’s forecast depends on the timing and volume of waste shipments and project activity directed by U.S. government customers. Because these customers do not provide binding assurances regarding the timing or volume of future work, and such activity is subject to appropriations, procurement processes, operational considerations and other factors outside the Company’s control, management could not conclude that its plans are probable of effectively mitigating the conditions giving rise to substantial doubt. Accordingly, substantial doubt continues to exist about the Company’s ability to continue as a going concern for one year following the date the accompanying Condensed Consolidated Financial Statements are issued. Management’s plans to address these conditions include utilizing existing cash and borrowing availability; pursuing operating improvements supported by the Company’s Treatment and Services Segment backlogs; continuing to pursue additional government, commercial and international project opportunities; managing capital expenditures and operating costs; and, if necessary, seeking additional liquidity through equity or other financing arrangements or potential asset dispositions. In May 2026, the Company completed a public equity offering that generated net proceeds of approximately $21,114,000, net of offering costs. In addition, subsequent to June 30, 2026, the Company extended the maturity of its PNC Credit Facility from May 2027 to May 2030, among other changes (see “Note 14 —Subsequent Events—Credit Facility”). Although the May 2026 equity offering strengthened the Company’s liquidity, management concluded that the substantial doubt was not alleviated. Management expects the Company’s existing liquidity, anticipated operating cash flows and borrowing availability to be sufficient to fund its operations during the assessment period. However, the ability of management’s plans to mitigate the conditions giving rise to substantial doubt depends in part on the timing and volume of government-directed waste shipments and project activity, as well as other matters outside the Company’s control. In addition, the Company’s borrowing availability is subject to compliance with applicable financial covenants and other conditions. There can be no assurance that additional liquidity, if needed, will be available on acceptable terms or at all. The Condensed Consolidated Financial Statements do not include any adjustments to the carrying amounts or classification of assets and liabilities that might result from the outcome of this uncertainty. Reclassification During the second quarter of 2026, the Company revised the presentation of the disaggregation of revenue in “Note 3 – Revenue” for the three and six months ended June 30, 2025, to reclassify certain contracts previously presented as fixed-price revenue to time-and-materials revenue. Approximately $237,000 of revenue for each of the three- and six-month periods ended June 30, 2025, was reclassified from fixed-price revenue to time-and-materials revenue. This reclassification had no effect on the Company’s previously reported consolidated statements of operations, balance sheets, stockholders’ equity, cash flows, or total revenue. Correction of an Immaterial Error During the preparation of the accompanying Condensed Consolidated Financial Statements, the Company determined that the cash flow effects of certain property and equipment additions included in accounts payable were incorrectly presented in its previously issued Condensed Consolidated Statement of Cash Flows for the six months ended June 30, 2025. Specifically, the change in “Accounts payable, accrued expenses, unearned revenue and other liabilities” within operating activities included amounts attributable to property and equipment additions, and “Purchases of property and equipment” within investing activities did not properly reflect the cash paid during the period for such additions. Accordingly, the Company has revised the comparative prior-period Condensed Consolidated Statement of Cash Flows presented herein by reducing the decrease in “Accounts payable, accrued expenses, unearned revenue and other liabilities” within operating activities by $334,000, from $(1,402,000) to $(1,068,000), and increasing the cash outflow from “Purchases of property and equipment” within investing activities by $334,000, from $(1,432,000) to $(1,766,000). The Company also presented property and equipment additions of $441,000 that remained unpaid and were included in accounts payable as of June 30, 2025 as a supplemental non-cash investing activity. The correction decreased net cash used in operating activities by $334,000 and increased net cash used in investing activities by $334,000 and had no effect on the Company’s previously reported condensed consolidated statements of operations, balance sheets or stockholders’ equity.

Basis of Presentation

6 Months Ended

Jun. 30, 2026

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 SEC. Certain information and note disclosures normally included in financial statements prepared in accordance with 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 six months ended June 30, 2026, are not necessarily indicative of results to be expected for the fiscal year ending December 31, 2026.

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, 2025.

The condensed consolidated financial statements include the accounts of our wholly-owned subsidiaries.

Financial Position and Liquidity

These condensed consolidated financial statements have been prepared in accordance with U.S. GAAP assuming the Company will continue as a going concern. The going concern assumption contemplates the realization of assets and the satisfaction of liabilities in the normal course of business.

The Company incurred losses from continuing operations before tax of $15,134,000 during 2024, $10,665,000 during 2025, and $13,637,000 during the first six months of 2026. The Company also experienced cash used in continuing operations of $14,146,000 during 2024, $10,311,000 during 2025, and $8,769,000 during the first six months of 2026. These results were due in part to delays in the enactment of federal appropriations and Congress’s continued use of CRs, as well as increased investments in PFAS technology, expansion of treatment capacity, workforce growth, and infrastructure enhancements intended to support anticipated waste treatment volumes, including anticipated Hanford-related waste volumes. In addition, for 2026 year to date, delays in the commencement of several new projects within our Services Segment, processing delays due to customer-directed changes in treatment protocols and the continued processing of previously stored waste inventories to prepare for anticipated increases in certain Hanford-related waste volumes negatively impacted our revenues during the quarter. Certain of these previously stored waste inventories carried lower margins, which adversely affected our results of operations. These lower-margin previously stored waste inventories have now been substantially processed and are not expected to have a material effect on operating results during the next twelve months.

The Company’s expected cash requirements over the next twelve months include working capital needs, scheduled principal payments on debt, costs associated with the administration and monitoring of discontinued operations, R&D expenditures related to PFAS technology, and capital expenditures.

A significant portion of the projected revenues and cash flows underlying management’s forecast depends on the timing and volume of waste shipments and project activity directed by U.S. government customers. Because these customers do not provide binding assurances regarding the timing or volume of future work, and such activity is subject to appropriations, procurement processes, operational considerations and other factors outside the Company’s control, management could not conclude that its plans are probable of effectively mitigating the conditions giving rise to substantial doubt. Accordingly, substantial doubt continues to exist about the Company’s ability to continue as a going concern for one year following the date the accompanying Condensed Consolidated Financial Statements are issued.

Management’s plans to address these conditions include utilizing existing cash and borrowing availability; pursuing operating improvements supported by the Company’s Treatment and Services Segment backlogs; continuing to pursue additional government, commercial and international project opportunities; managing capital expenditures and operating costs; and, if necessary, seeking additional liquidity through equity or other financing arrangements or potential asset dispositions. In May 2026, the Company completed a public equity offering that generated net proceeds of approximately $21,114,000, net of offering costs. In addition, subsequent to June 30, 2026, the Company extended the maturity of its PNC Credit Facility from May 2027 to May 2030, among other changes (see “Note 14 —Subsequent Events—Credit Facility”).

Although the May 2026 equity offering strengthened the Company’s liquidity, management concluded that the substantial doubt was not alleviated. Management expects the Company’s existing liquidity, anticipated operating cash flows and borrowing availability to be sufficient to fund its operations during the assessment period. However, the ability of management’s plans to mitigate the conditions giving rise to substantial doubt depends in part on the timing and volume of government-directed waste shipments and project activity, as well as other matters outside the Company’s control. In addition, the Company’s borrowing availability is subject to compliance with applicable financial covenants and other conditions. There can be no assurance that additional liquidity, if needed, will be available on acceptable terms or at all.

The Condensed Consolidated Financial Statements do not include any adjustments to the carrying amounts or classification of assets and liabilities that might result from the outcome of this uncertainty.

Reclassification

During the second quarter of 2026, the Company revised the presentation of the disaggregation of revenue in “Note 3 – Revenue” for the three and six months ended June 30, 2025, to reclassify certain contracts previously presented as fixed-price revenue to time-and-materials revenue. Approximately $237,000 of revenue for each of the three- and six-month periods ended June 30, 2025, was reclassified from fixed-price revenue to time-and-materials revenue. This reclassification had no effect on the Company’s previously reported consolidated statements of operations, balance sheets, stockholders’ equity, cash flows, or total revenue.

Correction of an Immaterial Error

During the preparation of the accompanying Condensed Consolidated Financial Statements, the Company determined that the cash flow effects of certain property and equipment additions included in accounts payable were incorrectly presented in its previously issued Condensed Consolidated Statement of Cash Flows for the six months ended June 30, 2025. Specifically, the change in “Accounts payable, accrued expenses, unearned revenue and other liabilities” within operating activities included amounts attributable to property and equipment additions, and “Purchases of property and equipment” within investing activities did not properly reflect the cash paid during the period for such additions.

Accordingly, the Company has revised the comparative prior-period Condensed Consolidated Statement of Cash Flows presented herein by reducing the decrease in “Accounts payable, accrued expenses, unearned revenue and other liabilities” within operating activities by $334,000, from $(1,402,000) to $(1,068,000), and increasing the cash outflow from “Purchases of property and equipment” within investing activities by $334,000, from $(1,432,000) to $(1,766,000). The Company also presented property and equipment additions of $441,000 that remained unpaid and were included in accounts payable as of June 30, 2025 as a supplemental non-cash investing activity. The correction decreased net cash used in operating activities by $334,000 and increased net cash used in investing activities by $334,000 and had no effect on the Company’s previously reported condensed consolidated statements of operations, balance sheets or stockholders’ equity.