Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2016	Aug. 15, 2016
Entity Information [Line Items]
Entity Registrant Name	COMMERCEHUB, INC.
Entity Central Index Key	0001665658
Document Type	10-Q
Document Period End Date	Jun. 30, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q2
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Amendment Flag	false
Common Series A
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding (in shares)		13,522,288
Common Series B
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding (in shares)		711,992
Common Series C
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding (in shares)		28,468,562