Document and Entity Information (USD $)	12 Months Ended
	Jun. 30, 2013	Oct. 08, 2013	Dec. 31, 2012
Document and Entity Information
Entity Registrant Name	CUBIC ENERGY INC
Entity Central Index Key	0000319156
Document Type	10-K
Document Period End Date	Jun. 30, 2013
Amendment Flag	true
Amendment Description	This Amendment No. 4 to the Annual Report on Form 10K/A amends Note J - Oil and gas reserves information (unaudited) in the Notes to Financial Statements.
Pre-Effective Amendment Number	4
Current Fiscal Year End Date	--06-30
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Smaller Reporting Company
Entity Public Float			$ 7,612,332
Entity Common Stock, Shares Outstanding		77,505,908
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	FY