Document And Entity Information (USD $)	6 Months Ended
	Jun. 30, 2013	Aug. 02, 2013
Document and Entity Information [Abstract]
Entity Registrant Name	HALLADOR ENERGY COMPANY
Document Type	10-Q
Current Fiscal Year End Date	--12-31
Entity Common Stock, Shares Outstanding		28,604,667
Entity Public Float	$ 74,422,886
Amendment Flag	false
Entity Central Index Key	0000788965
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Smaller Reporting Company
Entity Well-known Seasoned Issuer	No
Document Period End Date	Jun. 30, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q2