Document and Entity Information (USD $)	12 Months Ended
	Mar. 31, 2012	Jun. 01, 2012
Document And Entity Information
Entity Registrant Name	EARTHSTONE ENERGY INC
Entity Central Index Key	0000010254
Document Type	10-K
Document Period End Date	Mar. 31, 2012
Amendment Flag	true
Amendment description	This amendment is being filed to comply with regulations.
Current Fiscal Year End Date	--03-31
Is Entity a Well-known Seasoned Issuer?	No
Is Entity a Voluntary Filer?	No
Is Entity's Reporting Status Current?	Yes
Entity Filer Category	Smaller Reporting Company
Entity Public Float		$ 14,637,376
Entity Common Stock, Shares Outstanding		1,706,588
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2012