Cover
Cover - USD ($) | 12 Months Ended | ||
Dec. 31, 2023 | Apr. 24, 2024 | Jun. 30, 2023 | |
Cover [Abstract] | |||
Document Type | 10-K/A | ||
Amendment Flag | false | ||
Document Annual Report | true | ||
Document Transition Report | false | ||
Document Period End Date | Dec. 31, 2023 | ||
Document Fiscal Period Focus | FY | ||
Document Fiscal Year Focus | 2023 | ||
Current Fiscal Year End Date | --12-31 | ||
Entity File Number | 001-35521 | ||
Entity Registrant Name | CLEARSIGN TECHNOLOGIES CORPORATION | ||
Entity Central Index Key | 0001434524 | ||
Entity Tax Identification Number | 26-2056298 | ||
Entity Incorporation, State or Country Code | DE | ||
Entity Address, Address Line One | 8023 East 63rd Place, Suite 101 | ||
Entity Address, City or Town | Tulsa | ||
Entity Address, State or Province | OK | ||
Entity Address, Postal Zip Code | 74133 | ||
City Area Code | 918 | ||
Local Phone Number | 236-6461 | ||
Title of 12(b) Security | Common Stock | ||
Trading Symbol | CLIR | ||
Security Exchange Name | NASDAQ | ||
Entity Well-known Seasoned Issuer | No | ||
Entity Voluntary Filers | No | ||
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 Public Float | $ 40,360,983 | ||
Entity Common Stock, Shares Outstanding | 45,913,546 | ||
ICFR Auditor Attestation Flag | false | ||
Document Financial Statement Error Correction [Flag] | false | ||
Auditor Name | BPM CPA LLP | ||
Auditor Location | Santa Monica, CA | ||
Auditor Firm ID | 207 |