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Document and Entity Information
 3 Months Ended
Mar. 31, 2012
Jun. 11, 2012
Entity Registrant Name CLEARSIGN COMBUSTION CORP  
Entity Central Index Key 0001434524  
Current Fiscal Year End Date --12-31  
Entity Filer Category Smaller Reporting Company  
Trading Symbol clir  
Entity Common Stock, Shares Outstanding   8,752,015
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Mar. 31, 2012  
Document Fiscal Period Focus Q1  
Document Fiscal Year Focus 2012