Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2017	Apr. 26, 2017
Entity Information [Line Items]
Entity Registrant Name	COMMERCEHUB, INC.
Entity Central Index Key	0001665658
Document Type	10-Q
Document Period End Date	Mar. 31, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q1
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Amendment Flag	false
Series A
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding (in shares)		13,593,992
Series B
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding (in shares)		711,992
Series C
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding (in shares)		28,841,977