DISCONTINUED OPERATIONS - Schedule of Discontiued Operations (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net loss from discontinued operations	$ (10,126)	$ (5,799)
Less: Net loss attributable to noncontrolling interests from discontinued operations	(201)	(3,232)
Cash and cash equivalents	0		$ 21,075
Restricted cash	0		1,484
Accounts receivable, net	0		7,258
Other current assets	0		4,312
Total current assets held for sale	0		34,129
Cash and cash equivalents	40,550		0
Restricted cash	1,570		0
Accounts receivable, net	6,293		0
Property and equipment, net	8,670		8,783
Intangible assets, net	10,591		13,852
Goodwill	28,790		28,790
Equity securities	44,696		45,878
Operating lease right-of-use assets	7,716		7,226
Other long-term assets, net	4,486		1,626
Total long-term assets held for sale	153,362		106,155
Accounts payable and accrued liabilities	0		11,939
Other current liabilities	0		1,985
Total current liabilities held for sale	0		13,924
Accounts payable and accrued liabilities	9,704		0
Operating lease liabilities, non-current	8,607		7,099
Other long-term liabilities	723		586
Total long-term liabilities held for sale	19,034		$ 7,685
Discontinued Operations, Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue, net	15,592	11,975
Cost of goods sold	12,391	10,341
Gross profit	3,201	1,634
Sales and marketing	552	417
Technology	6,556	5,515
General and administrative	10,873	8,541
Total operating expenses	17,981	14,473
Operating loss from discontinued operations	(14,780)	(12,839)
Interest income, net	187	83
Other income, net	4,479	6,970
Loss from discontinued operations before income taxes	(10,114)	(5,786)
Provision for income taxes	12	13
Net loss from discontinued operations	(10,126)	(5,799)
Less: Net loss attributable to noncontrolling interests from discontinued operations	(201)	(3,232)
Net loss from discontinued operations attributable to stockholders of Overstock.com, Inc.	$ (9,925)	$ (2,567)