Document and Entity Information (USD $)	12 Months Ended
	Jun. 30, 2013	Sep. 20, 2013	Dec. 31, 2012
Document And Entity Information
Entity Registrant Name	DEWEY ELECTRONICS CORP
Entity Central Index Key	0000028561
Document Type	10-K
Document Period End Date	Jun. 30, 2013
Amendment Flag	false
Current Fiscal Year End Date	--06-30
Is Entity a Well-known Seasoned Issuer?	No
Is Entity a Voluntary Filer?	No
Is Entity's Reporting Status Current?	Yes
Entity Filer Category	Smaller Reporting Company
Entity Public Float			$ 1,683,058
Entity Common Stock, Shares Outstanding		1,362,031
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2013