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Document and Entity Information	3 Months Ended
	Mar. 31, 2013	May 06, 2013
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		8,793,265
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2013
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2013

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