Document and Entity Information	6 Months Ended
	Jan. 31, 2015	Mar. 06, 2015
Document and Entity Information [Abstract]
Entity Registrant Name	SYNERGETICS USA INC
Entity Central Index Key	0000836429
Current Fiscal Year End Date	--07-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		25,566,332
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q2
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jan. 31, 2015