Document and Entity Information - shares	3 Months Ended
	Jun. 30, 2015	Jul. 27, 2015
Entity Registrant Name	DOVER DOWNS GAMING & ENTERTAINMENT INC
Entity Central Index Key	0001162556
Document Type	10-Q
Document Period End Date	Jun. 30, 2015
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Smaller Reporting Company
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q2
Common stock.
Entity Common Stock, Shares Outstanding		17,990,997
Class A common stock
Entity Common Stock, Shares Outstanding		14,870,673