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REVENUE AND CONTRACT LIABILITY (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disaggregation of Revenue [Line Items] |  |  |
Unearned revenue | $ 59,387 | $ 72,165 |
Gift card and Club-O rewards breakage | 6,900 | 5,400 | $ 4,200
Club O Reward Points [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Unearned revenue | $ 10,000 | $ 8,600 |

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- Definition Represents the amount of breakage recognized during the period related to unredeemed gift cards and club rewards. + References No definition available. + Details
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Namespace Prefix: | ostk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Amount of deferred income and obligation to transfer product and service to customer for which consideration has been received or is receivable, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(5)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | ostk_ContractWithCustomerLiabilityAxis=ostk_ClubORewardPointsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |