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EMPLOYEE RETIREMENT PLAN (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Retirement Benefits [Abstract]
Minimum period of service to qualify to participate in 401(k) defined contribution plan	3 months
Eligible age to participate in 401(k) defined contribution plan	21 years
Employer match of first 6% of participant's contributions (as a percent)	100.00%
Percentage of participant's' gross pay for which the employer contributes a matching contribution	6.00%
Matching contributions made by the company	$ 5,200,000	$ 4,900,000	$ 4,600,000
Discretionary contributions	$ 0	$ 0	$ 0

X

- Definition

The employer contribution as a percentage of the amount contributed by employee up to specified employee contribution that the employer may contribute to a defined contribution plan.

+ References

No definition available.

+ Details

Name:	ostk_DefinedContributionPlanEmployerMatchUpToSpecifiedEmployeeContribution
Namespace Prefix:	ostk_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The minimum period that the individual is required to perform services in order to be fully vested under the 401(k) defined contribution plan.

+ References

No definition available.

+ Details

Name:	ostk_DefinedContributionPlanMinimumRequisiteServicePeriod
Namespace Prefix:	ostk_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

This element represents the minimum age limit for participating in 401(k) defined contribution plan.

+ References

No definition available.

+ Details

Name:	ostk_DefinedContributionPlanParticipantMinimumAge
Namespace Prefix:	ostk_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
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X

- Definition

Amount of cost for defined contribution plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942

+ Details

Name:	us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of discretionary contributions made by an employer to a defined contribution plan.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration