| Document and Entity Information | Nov. 15, 2021 |
| Cover [Abstract] | |
| Entity Registrant Name | OVERSTOCK.COM, INC |
| Amendment Flag | false |
| Entity Central Index Key | 0001130713 |
| Document Type | 8-K |
| Document Period End Date | Nov. 15, 2021 |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 000-49799 |
| Entity Tax Identification Number | 87-0634302 |
| Entity Address, Address Line One | 799 W. Coliseum Way |
| Entity Address, City or Town | Midvale |
| Entity Address, State or Province | UT |
| Entity Address, Postal Zip Code | 84047 |
| City Area Code | (801) |
| Local Phone Number | 947-3100 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, $0.0001 par value per share |
| Trading Symbol | OSTK |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
