Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common stock	Treasury stock	Preferred stock	Additional paid-in capital	Accumulated deficit	Accumulated other comprehensive loss	Parent	Noncontrolling interest	Series A-1 Preferred Stock	Series A-1 Preferred Stock Preferred stock	Series B Preferred Stock	Series B Preferred Stock Preferred stock
Common stock, beginning balance (in shares) at Dec. 31, 2019		42,790,000	3,326,000
Beginning balance at Dec. 31, 2019			$ (68,807)		$ 764,845	$ (580,390)	$ (568)		$ 62,771
Increase (Decrease) in Stockholders' Equity
Preferred Stock, Shares, Dividends Declared										4,085,445
Stock-based compensation to employees and directors					3,268
Change in noncontrolling interest ownership					0				0
Proceeds from Issuance of Common Stock	$ 2,848
Proceeds from Sale of Treasury Stock					0
Other					(58)				1,837
Adjustments To Additional Paid In Capital, Subsidiary Equity Award Tender Offer					0
Net income (loss) attributable to stockholders of Overstock.com, Inc.	(16,333)					(16,333)
Net other comprehensive income	4						4
Tax withholding upon vesting of restricted stock			(1,686)
Stock Issued During Period, Value, Treasury Stock Reissued			$ 0
Net loss attributable to noncontrolling interests									(3,232)
Common stock issued upon vesting of restricted stock		671,000
Common stock sold through offerings		416,000
Tax withholding upon vesting of restricted stock			225,000
Stock Issued During Period, Shares, Treasury Stock Reissued			0
Preferred stock, ending balance (in shares) at Mar. 31, 2020											4,210,000		357,000
Common stock, ending balance (in shares) at Mar. 31, 2020		43,877,000	3,551,000
Ending balance at Mar. 31, 2020	161,655		$ (70,493)		768,055	(596,723)	(564)	$ 100,279	61,376
Increase (Decrease) in Stockholders' Equity
Common stock, $0.0001 par value, authorized shares - 100,000		$ 4
Total shares of common stock outstanding		40,326,000
Preferred Stock, Value, Issued				$ 0
Common stock, $0.0001 par value, authorized shares - 100,000	$ 4
Total shares of common stock outstanding	42,768,000
Preferred Stock, Value, Issued										$ 0		$ 0
Common stock, beginning balance (in shares) at Dec. 31, 2020		46,331,000	3,563,000
Beginning balance at Dec. 31, 2020	$ 436,326		$ (71,399)		970,873	(525,233)	(553)		62,634
Preferred stock, beginning balance (in shares) at Dec. 31, 2020										4,204,000		357,000
Increase (Decrease) in Stockholders' Equity
Stock-based compensation to employees and directors					2,771
Change in noncontrolling interest ownership					(22,625)				22,625
Proceeds from Issuance of Common Stock	0
Proceeds from Sale of Treasury Stock					2,726
Other					0				0
Adjustments To Additional Paid In Capital, Subsidiary Equity Award Tender Offer					(2,130)
Net income (loss) attributable to stockholders of Overstock.com, Inc.	16,093					16,093
Net other comprehensive income	4						4
Tax withholding upon vesting of restricted stock			(7,292)
Stock Issued During Period, Value, Treasury Stock Reissued			$ 643
Net loss attributable to noncontrolling interests									(201)
Common stock issued upon vesting of restricted stock		258,000
Common stock sold through offerings		0
Tax withholding upon vesting of restricted stock			73,000
Stock Issued During Period, Shares, Treasury Stock Reissued			(47,000)
Preferred stock, ending balance (in shares) at Mar. 31, 2021										4,204,000	4,204,000	357,000	357,000
Common stock, ending balance (in shares) at Mar. 31, 2021		46,589,000	3,589,000
Ending balance at Mar. 31, 2021	448,940		$ (78,048)		$ 951,615	$ (509,140)	$ (549)	$ 363,882	$ 85,058
Increase (Decrease) in Stockholders' Equity
Common stock, $0.0001 par value, authorized shares - 100,000	$ 4	$ 4
Total shares of common stock outstanding	43,000,000	43,000,000
Preferred Stock, Value, Issued				$ 0						$ 0		$ 0