Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common stock	Preferred stock	Additional paid-in capital	Accumulated deficit	Accumulated other comprehensive loss	Treasury stock	Parent	Noncontrolling interest	Series A Preferred Stock Preferred stock	Series A-1 Preferred Stock [Member]	Series A-1 Preferred Stock [Member] Preferred stock	Series B Preferred Stock	Series B Preferred Stock Preferred stock
Common stock, beginning balance (in shares) at Dec. 31, 2018		35,346					3,200
Preferred stock, beginning balance (in shares) at Dec. 31, 2018										127		0		355
Increase (Decrease) in Stockholders' Equity
Shares converted (in shares)										(1)		(123)		(1)
Partners' Capital Account, Exchange of Shares										123
Shares declared, not distributed												0
Common stock issued upon vesting of restricted stock		255
Common stock sold through ATM offering		2,960
Common stock repurchased through business combination							47
Tax withholding upon vesting of restricted stock							75
Preferred stock, ending balance (in shares) at Jun. 30, 2019										3		123		356
Common stock, ending balance (in shares) at Jun. 30, 2019		38,561					3,322
Beginning balance at Dec. 31, 2018				$ 657,981	$ (458,897)	$ (584)	$ (66,757)		$ 78,960
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Stock-based compensation to employees and directors				9,156
Adjustments to Additional Paid in Capital, Noncontrolling Interests									0
Proceeds from issuance and exercise of stock warrants	$ 52,112			52,112
Other				(239)	425				(581)
Net income (loss) attributable to stockholders of Overstock.com, Inc.	(63,925)				(63,925)
Net other comprehensive income	8					8
Common stock repurchased through business combination							(643)
Tax withholding upon vesting of restricted stock							(1,346)
Net loss attributable to noncontrolling interests	(6,593)								(6,593)
Ending balance at Jun. 30, 2019	199,080		$ 0	719,010	(522,397)	(576)	$ (68,746)	$ 127,294	71,786
Common stock, beginning balance (in shares) at Mar. 31, 2019		37,802					3,319
Preferred stock, beginning balance (in shares) at Mar. 31, 2019										127		0		355
Increase (Decrease) in Stockholders' Equity
Shares converted (in shares)										(1)		(123)		(1)
Partners' Capital Account, Exchange of Shares										123
Shares declared, not distributed												0
Common stock issued upon vesting of restricted stock		14
Common stock sold through ATM offering		745
Common stock repurchased through business combination							0
Tax withholding upon vesting of restricted stock							3
Preferred stock, ending balance (in shares) at Jun. 30, 2019										3		123		356
Common stock, ending balance (in shares) at Jun. 30, 2019		38,561					3,322
Beginning balance at Mar. 31, 2019				701,877	(497,716)	(580)	$ (68,753)		74,731
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Stock-based compensation to employees and directors				5,171
Adjustments to Additional Paid in Capital, Noncontrolling Interests									0
Proceeds from issuance and exercise of stock warrants				12,198
Other				(236)	0				0
Net income (loss) attributable to stockholders of Overstock.com, Inc.	(24,681)				(24,681)
Net other comprehensive income	4					4
Common stock repurchased through business combination							0
Tax withholding upon vesting of restricted stock							7
Net loss attributable to noncontrolling interests	(2,945)								(2,945)
Ending balance at Jun. 30, 2019	199,080		0	719,010	(522,397)	(576)	$ (68,746)	127,294	71,786
Common Stock, Value, Issued		$ 3
Increase (Decrease) in Stockholders' Equity
Total shares of common stock outstanding		35,239
Common Stock, Value, Issued	$ 4
Total shares of common stock outstanding	39,464
Common stock, beginning balance (in shares) at Dec. 31, 2019		42,790					3,326
Preferred stock, beginning balance (in shares) at Dec. 31, 2019										0	4,210	4,210	357	357
Increase (Decrease) in Stockholders' Equity
Shares converted (in shares)										0		0		0
Partners' Capital Account, Exchange of Shares										0
Shares declared, not distributed												(6)
Common stock issued upon vesting of restricted stock		679
Common stock sold through ATM offering		416
Common stock repurchased through business combination							0
Tax withholding upon vesting of restricted stock							227
Preferred stock, ending balance (in shares) at Jun. 30, 2020										0	4,204	4,204	357	357
Common stock, ending balance (in shares) at Jun. 30, 2020		43,885					3,553
Beginning balance at Dec. 31, 2019	$ 177,855			764,845	(580,390)	(568)	$ (68,807)		62,771
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Stock-based compensation to employees and directors				5,733
Adjustments to Additional Paid in Capital, Noncontrolling Interests									5,000
Proceeds from issuance and exercise of stock warrants	2,848			0
Other				406	(113)				1,373
Net income (loss) attributable to stockholders of Overstock.com, Inc.	20,023				20,023
Net other comprehensive income	8					8
Common stock repurchased through business combination							0
Tax withholding upon vesting of restricted stock							(1,730)
Net loss attributable to noncontrolling interests	(5,207)								(5,207)
Ending balance at Jun. 30, 2020	203,348		0	770,984	(560,480)	(560)	$ (70,537)	139,411	63,937
Common stock, beginning balance (in shares) at Mar. 31, 2020		43,877					3,551
Preferred stock, beginning balance (in shares) at Mar. 31, 2020										0		4,210		357
Increase (Decrease) in Stockholders' Equity
Shares converted (in shares)										0		0		0
Partners' Capital Account, Exchange of Shares										0
Shares declared, not distributed												(6)
Common stock issued upon vesting of restricted stock		8
Common stock sold through ATM offering		0
Common stock repurchased through business combination							0
Tax withholding upon vesting of restricted stock							2
Preferred stock, ending balance (in shares) at Jun. 30, 2020										0	4,204	4,204	357	357
Common stock, ending balance (in shares) at Jun. 30, 2020		43,885					3,553
Beginning balance at Mar. 31, 2020				768,055	(596,723)	(564)	$ (70,493)		61,376
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Stock-based compensation to employees and directors				2,465
Adjustments to Additional Paid in Capital, Noncontrolling Interests									5,000
Proceeds from issuance and exercise of stock warrants				0
Other				464	(113)				(464)
Net income (loss) attributable to stockholders of Overstock.com, Inc.	36,356				36,356
Net other comprehensive income	4					4
Common stock repurchased through business combination							0
Tax withholding upon vesting of restricted stock							(44)
Net loss attributable to noncontrolling interests	(1,975)								(1,975)
Ending balance at Jun. 30, 2020	203,348		$ 0	$ 770,984	$ (560,480)	$ (560)	$ (70,537)	$ 139,411	$ 63,937
Common Stock, Value, Issued	$ 4	$ 4
Increase (Decrease) in Stockholders' Equity
Total shares of common stock outstanding	40,332	40,332