| Document and Entity Information - USD ($) | 12 Months Ended | | |
| Dec. 31, 2022 | Apr. 19, 2023 | Jun. 30, 2022 |
| Cover [Abstract] | | | |
| Document Type | 10-K/A | | |
| Amendment Flag | true | | |
| Amendment Description | PCTEL, Inc. (“PCTEL”, the “Company”, “we”, or “us”) is filing this Amendment No. 1 on Form 10-K/A (this “Amendment”) to file certain information that will be included in the Company’s definitive proxy statement for the Company’s 2023 Annual Meeting of Stockholders. This Amendment amends the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022, originally filed with the Securities and Exchange Commission (the “SEC”) on March 16, 2023 (the “Original Filing”). The Company is filing this Amendment to amend Part III of the Original Filing to include the information required by and not included in Part III of the Original Filing because the Company will not be filing its definitive proxy statement within 120 days of the end of its fiscal year ended December 31, 2022. In accordance with Rule 12b-15 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), Part III, Items 10 through 14 of the Original Filing are hereby amended and restated in their entirety. Additionally, in accordance with Rules 12b-15 and 13a-14 under the Exchange Act, wehave amended Part IV, Item 15 to include currently dated certifications pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. Since no new financial statements have been included in this Amendment and this Amendment does not contain or amend any disclosure with respect to Items 307 and 308 of Regulation S-K, paragraphs 3, 4, and 5 of the certifications have been omitted. Similarly, since no financial statements have been included in this Amendment, certifications pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 have been omitted. Except for the changes to Part III and the filing of related certifications added to the list of Exhibits in Part IV, no other changes have been made to the Original Filing. The Original Filing continues to speak as of the date of the Original Filing, and the Company has not updated the disclosures contained therein to reflect any events which occurred at a date subsequent to the filing of the Original Filing other than as expressly indicated in this Amendment. Accordingly, this Amendment should read in conjunction with the Original Filing and the Company’s other filings made with the SEC on or subsequent to March 16, 2023. Terms used but not otherwise defined in the Amendment have such meaning as ascribed to them in the Original Filing. | | |
| Document Period End Date | Dec. 31, 2022 | | |
| Document Fiscal Year Focus | 2022 | | |
| Document Fiscal Period Focus | FY | | |
| Trading Symbol | PCTI | | |
| Entity Registrant Name | PCTEL, Inc. | | |
| Entity Central Index Key | 0001057083 | | |
| Current Fiscal Year End Date | --12-31 | | |
| Entity Current Reporting Status | Yes | | |
| Entity Voluntary Filers | No | | |
| Entity Interactive Data Current | Yes | | |
| Entity Filer Category | Accelerated Filer | | |
| Entity Well-known Seasoned Issuer | No | | |
| Entity Shell Company | false | | |
| Entity Small Business | true | | |
| Entity Emerging Growth Company | false | | |
| Title of 12(b) Security | Common Stock, $.001 Par Value Per Share | | |
| Security Exchange Name | NASDAQ | | |
| Entity File Number | 000-27115 | | |
| Entity Incorporation, State or Country Code | DE | | |
| Entity Tax Identification Number | 77-0364943 | | |
| Entity Common Stock Shares Outstanding | | 19,083,075 | |
| Entity Public Float | | | $ 86,104,893 |
| Document Annual Report | true | | |
| Document Transition Report | false | | |
| Entity Address, Address Line One | 471 Brighton Drive | | |
| Entity Address, City or Town | Bloomingdale | | |
| Entity Address, State or Province | IL | | |
| Entity Address, Postal Zip Code | 60108 | | |
| City Area Code | 630 | | |
| Local Phone Number | 372-6800 | | |
| ICFR Auditor Attestation Flag | true | | |
| Auditor Firm ID | 248 | | |
| Auditor Name | Grant Thornton LLP | | |
| Auditor Location | Chicago, IL | | |
