Document and Entity Information - USD ($)	12 Months Ended
	Apr. 01, 2018	May 29, 2018	Sep. 24, 2017
Document and Entity Information [Abstract]
Entity Registrant Name	TESSCO TECHNOLOGIES INC
Entity Central Index Key	0000927355
Current Fiscal Year End Date	--04-01
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Public Float			$ 80,064,597
Entity Common Stock, Shares Outstanding		8,426,655
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	FY
Document Type	10-K
Amendment Flag	false
Document Period End Date	Apr. 01, 2018