Document and Entity Information - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Mar. 29, 2019
Document and Entity Information:
Entity Registrant Name	New Concept Energy, Inc.
Entity Central Index Key	0000105744
Document Type	10-K
Document Period End Date	Dec. 31, 2018
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Is Entity a Well-known Seasoned Issuer?	No
Is Entity a Voluntary Filer?	No
Is Entity's Reporting Status Current?	No
Is Entity Emerging Growth Company?	false
Elected Not To Use the Extended Transition Period	true
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Public Float		$ 8,216
Entity Common Stock, Shares Outstanding	5,131,934
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2018
Entity Shell Company	false