Document and Entity Information - USD ($)	12 Months Ended
	Sep. 30, 2018	Jan. 07, 2019	Mar. 31, 2018
Document And Entity Information
Entity Registrant Name	VICON INDUSTRIES INC /NY/
Entity Central Index Key	0000310056
Document Type	10-K
Document Period End Date	Sep. 30, 2018
Amendment Flag	false
Current Fiscal Year End Date	--09-30
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business Flag	true
Entity Emerging Growth Company	false
Entity Ex Transition Period	false
Entity Shell Company	false
Entity Public Float			$ 3,477,000
Entity Common Stock, Shares Outstanding		17,552,623
Trading Symbol	VCON
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2018