Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2017	Aug. 04, 2017
Document Information [Line Items]
Entity Registrant Name	TUCOWS INC /PA/
Entity Central Index Key	0000909494
Trading Symbol	tcx
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Entity Common Stock, Shares Outstanding (in shares)		10,553,291
Document Type	10-Q
Document Period End Date	Jun. 30, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q2
Amendment Flag	false