Document And Entity Information (USD $)	9 Months Ended
	Dec. 25, 2011	Jan. 24, 2012	Sep. 26, 2010
Entity Registrant Name	TESSCO TECHNOLOGIES INC
Entity Central Index Key	0000927355
Current Fiscal Year End Date	--03-27
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Public Float			$ 77,988,214
Entity Common Stock, Shares Outstanding		7,779,337
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	Q3
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Dec. 25, 2011