Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2016	Feb. 21, 2017	Jun. 30, 2016
Entity Registrant Name	DOVER DOWNS GAMING & ENTERTAINMENT INC
Entity Central Index Key	0001162556
Document Type	10-K
Document Period End Date	Dec. 31, 2016
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Smaller Reporting Company
Entity Public Float			$ 18,209,081
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	FY
Common Stock | Common Stock
Entity Common Stock, Shares Outstanding		18,283,009
Common Stock | Class A Common Stock
Entity Common Stock, Shares Outstanding		14,869,623