Document And Entity Information - shares	3 Months Ended
	Jan. 31, 2018	Mar. 09, 2018
Document Information [Line Items]
Entity Registrant Name	Crystal Rock Holdings, Inc.
Entity Central Index Key	0001123316
Trading Symbol	crvp
Current Fiscal Year End Date	--10-31
Entity Filer Category	Smaller Reporting Company
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Entity Common Stock, Shares Outstanding (in shares)		21,358,411
Document Type	10-Q
Document Period End Date	Jan. 31, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q1
Amendment Flag	false