Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Apr. 08, 2020	Jun. 28, 2019
Document And Entity Information
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Entity Registrant Name	Harvest Oil & Gas Corp.
Entity Central Index Key	0001361937
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Voluntary Filers	No
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		10,173,707
Entity Public Float			$ 40.7