Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ 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		35,346,000					3,200,000
Increase (Decrease) in Stockholders' Equity
Common stock issued upon vesting of restricted stock		242,000
Common stock sold through ATM offering		2,214,000
Common stock repurchased through business combination							47,000
Tax withholding upon vesting of restricted stock							72,000
Preferred stock, ending balance (in shares) at Mar. 31, 2019										127,000		0		355,000
Common stock, ending balance (in shares) at Mar. 31, 2019		37,802,000					3,319,000
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				3,985
Proceeds from issuance and exercise of stock warrants	$ 30,957			39,914
Other				(3)	425				(581)
Net loss attributable to stockholders of Overstock.com, Inc.	(39,244)				(39,244)
Net other comprehensive income	4					4
Common stock repurchased through business combination							(643)
Tax withholding upon vesting of restricted stock							(1,353)
Net loss attributable to noncontrolling interests	(3,648)								(3,648)
Ending balance at Mar. 31, 2019	209,562		$ 0	701,877	(497,716)	(580)	$ (68,753)	$ 134,831	74,731
Common stock, beginning balance (in shares) at Dec. 31, 2018		35,346,000					3,200,000
Increase (Decrease) in Stockholders' Equity
Dividend declared, not yet distributed (in shares)											4,085,000
Preferred stock, ending balance (in shares) at Dec. 31, 2019											4,210,000		357,000
Common stock, ending balance (in shares) at Dec. 31, 2019		42,790,000					3,326,000
Beginning balance at Dec. 31, 2018				657,981	(458,897)	(584)	$ (66,757)		78,960
Ending balance at Dec. 31, 2019	177,855			764,845	(580,390)	(568)	$ (68,807)		62,771
Common Stock, Value, Issued		$ 3
Increase (Decrease) in Stockholders' Equity
Total number of outstanding shares		34,483,000
Common Stock, Value, Issued	$ 4
Total number of outstanding shares	39,464,000
Common stock issued upon vesting of restricted stock		671,000
Common stock sold through ATM offering		416,000
Common stock repurchased through business combination							0
Tax withholding upon vesting of restricted stock							225,000
Dividend declared, not yet distributed (in shares)											4,085,000
Preferred stock, ending balance (in shares) at Mar. 31, 2020										0	4,210,000	4,210,000	357,000	357,000
Common stock, ending balance (in shares) at Mar. 31, 2020		43,877,000					3,551,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Stock-based compensation to employees and directors				3,268
Proceeds from issuance and exercise of stock warrants	$ 2,848			0
Other				(58)	0				1,837
Net loss attributable to stockholders of Overstock.com, Inc.	(16,333)				(16,333)
Net other comprehensive income	4					4
Common stock repurchased through business combination							$ 0
Tax withholding upon vesting of restricted stock							(1,686)
Net loss attributable to noncontrolling interests	(3,232)								(3,232)
Ending balance at Mar. 31, 2020	161,655		$ 0	$ 768,055	$ (596,723)	$ (564)	$ (70,493)	$ 100,279	$ 61,376
Common Stock, Value, Issued	$ 4	$ 4
Increase (Decrease) in Stockholders' Equity
Total number of outstanding shares	40,326,000	40,326,000