{"filing": {"accession": "0001437749-26-033927", "cik": "0001001385", "ticker": "NWPX", "company_name": "NWPX Infrastructure, Inc.", "form_type": "10-Q", "filing_type": "10-Q", "filing_date": "2026-10-29", "accepted_datetime": null, "acceptance_datetime": null, "accepted_at": null, "primary_doc_url": "https://www.sec.gov/Archives/edgar/data/1001385/000143774926033927/0001437749-26-033927-index.htm", "filing_url": "https://www.sec.gov/Archives/edgar/data/1001385/000143774926033927/0001437749-26-033927-index.htm", "period_of_report": "2026-09-30"}, "html_url": "/api/filings/000143774926033927/stream", "exhibits": [{"exhibit_number": "31.1", "exhibit_type": "31", "description": "Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, filed herewith", "filename": "ex_996702.htm", "edgar_url": "https://www.sec.gov/Archives/edgar/data/1001385/000143774926033927/ex_996702.htm", "category": "other", "incorporated_by_reference": false}, {"exhibit_number": "31.2", "exhibit_type": "31", "description": "Certification of Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, filed herewith", "filename": "ex_996703.htm", "edgar_url": "https://www.sec.gov/Archives/edgar/data/1001385/000143774926033927/ex_996703.htm", "category": "other", "incorporated_by_reference": false}, {"exhibit_number": "32.1", "exhibit_type": "32", "description": "Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, filed herewith", "filename": "ex_996704.htm", "edgar_url": "https://www.sec.gov/Archives/edgar/data/1001385/000143774926033927/ex_996704.htm", "category": "other", "incorporated_by_reference": false}, {"exhibit_number": "32.2", "exhibit_type": "32", "description": "Certification of Chief Financial Officer pursuant to 18 U.S.C. 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"financial", "caption": null, "header_text": "Page"}, {"table_index": 6, "table_type": "financial", "caption": null, "header_text": "Three Months Ended September 30,Nine Months Ended September 30,"}, {"table_index": 7, "table_type": "financial", "caption": null, "header_text": "Three Months Ended September 30,Nine Months Ended September 30,"}, {"table_index": 8, "table_type": "financial", "caption": null, "header_text": "September 30, 2026December 31, 2025"}, {"table_index": 9, "table_type": "financial", "caption": null, "header_text": "Accumulated"}, {"table_index": 10, "table_type": "financial", "caption": null, "header_text": "Accumulated"}, {"table_index": 11, "table_type": "financial", "caption": null, "header_text": "Accumulated"}, {"table_index": 12, "table_type": "financial", "caption": null, "header_text": "Accumulated"}, {"table_index": 13, "table_type": "financial", "caption": null, "header_text": "Nine Months Ended September 30,"}, {"table_index": 16, "table_type": 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arrangement listed is a Rule10b5\u20111trading arrangement and is intended to satisfy the affirmative defense conditions of Rule10b5\u20111(c) under the Exchange Act."}, {"table_index": 50, "table_type": "exhibit_index", "caption": null, "header_text": "ExhibitNumberDescription"}, {"table_index": 51, "table_type": "text", "caption": null, "header_text": "NWPX INFRASTRUCTURE, INC."}], "exhibits_pending": false, "cdn_html": true, "response_time_ms": 146}