Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2018	Aug. 08, 2018
Document and Entity Information
Entity Registrant Name	OVERSTOCK.COM, INC
Entity Central Index Key	0001130713
Document Type	10-Q
Document Period End Date	Jun. 30, 2018
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		29,009,814
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q2