Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2020	Aug. 12, 2020
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2020
Document Transition Report	false
Entity File Number	001-37670
Entity Registrant Name	Lonestar Resources US Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	81-0874035
Entity Address, Address Line Two	Suite 301
Entity Address, Address Line One	111 Boland Street
Entity Address, City or Town	Fort Worth
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	76107
City Area Code	817
Local Phone Number	921-1889
Title of 12(b) Security	Class A Voting Common Stock,par value $0.001 per share
Trading Symbol	LONE
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		25,375,314
Entity Central Index Key	0001661920
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q2
Amendment Flag	false