Document and Entity Information - USD ($)	12 Months Ended
	Mar. 26, 2017	May 30, 2017	Sep. 25, 2016
Document and Entity Information [Abstract]
Entity Registrant Name	TESSCO TECHNOLOGIES INC
Entity Central Index Key	0000927355
Current Fiscal Year End Date	--03-26
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Public Float			$ 75,368,521
Entity Common Stock, Shares Outstanding		8,362,076
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	FY
Document Type	10-K
Amendment Flag	false
Document Period End Date	Mar. 26, 2017