Document And Entity Information	3 Months Ended
	Mar. 31, 2014	May 12, 2014
Document Information [Line Items]
Entity Registrant Name	MGT CAPITAL INVESTMENTS INC
Entity Central Index Key	0001001601
Current Fiscal Year End Date	--12-31
Entity Filer Category	Smaller Reporting Company
Trading Symbol	MGT
Entity Common Stock, Shares Outstanding		9,139,603
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2014
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2014