Document And Entity Information (USD $)	12 Months Ended
	Jun. 30, 2014	Sep. 08, 2014	Dec. 31, 2013
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Jun. 30, 2014
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2014
Entity Registrant Name	PERCEPTRON INC/MI
Entity Central Index Key	0000887226
Current Fiscal Year End Date	--06-30
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		9,151,956
Entity Current Reporting Status	Yes
Entity Public Float			$ 119,100,000
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Trading Symbol	prcp