Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue, net
Total net revenue	$ 370,881	$ 347,099	$ 373,709	$ 367,729	$ 452,548	$ 440,580	$ 483,133	$ 445,331	$ 1,459,418	$ 1,821,592	$ 1,744,756
Cost of goods sold
Total cost of goods sold	294,359	277,551	299,810	294,605	370,968	353,864	391,390	351,462	1,166,325	1,467,684	1,404,205
Gross profit	76,522	69,548	73,899	73,124	81,580	86,716	91,743	93,869	293,093	353,908	340,551
Operating expenses:
Sales and marketing	40,868	34,215	34,560	33,477	47,537	55,312	94,416	77,214	143,120	274,479	180,589
Technology	33,970	32,782	33,153	35,433	34,557	33,880	32,423	31,294	135,338	132,154	115,878
General and administrative	33,247	32,681	31,964	40,232	47,930	45,356	31,440	39,755	138,124	164,481	90,718
Total operating expenses	108,085	99,678	99,677	109,142	130,024	134,548	158,279	148,263	416,582	571,114	387,185
Operating loss	(31,563)	(30,130)	(25,778)	(36,018)	(48,444)	(47,832)	(66,536)	(54,394)	(123,489)	(217,206)	(46,634)
Interest income	315	449	630	403	661	383	620	544	1,797	2,208	659
Interest expense	(53)	(57)	(105)	(127)	(98)	(101)	(395)	(874)	(342)	(1,468)	(2,937)
Other income (expense), net	1,547	(4,781)	(2,995)	(6,272)	(1,999)	(1,848)	368	(9)	(12,501)	(3,488)	1,178
Loss before income taxes	(29,754)	(34,519)	(28,248)	(42,014)	(49,880)	(49,398)	(65,943)	(54,733)	(134,535)	(219,954)	(47,734)
Provision (benefit) from income taxes	(94)	23	(622)	878	(1,939)	(141)	(27)	(277)	185	(2,384)	64,188
Consolidated net loss	(29,660)	(34,542)	(27,626)	(42,892)	(47,941)	(49,257)	(65,916)	(54,456)	(134,720)	(217,570)	(111,922)
Less: Net loss attributable to noncontrolling interests	(2,682)	(3,604)	(2,945)	(3,648)	(5,614)	(1,334)	(1,005)	(3,547)	(12,879)	(11,500)	(2,044)
Net loss attributable to stockholders of Overstock.com, Inc.	$ (26,978)	$ (30,938)	$ (24,681)	$ (39,244)	$ (42,327)	$ (47,923)	$ (64,911)	$ (50,909)	$ (121,841)	$ (206,070)	$ (109,878)
Net loss per common share—basic:
Net loss attributable to common shares—basic:	$ (0.73)	$ (0.89)	$ (0.69)	$ (1.18)	$ (1.39)	$ (1.55)	$ (2.20)	$ (1.74)	$ (3.46)	$ (6.83)	$ (4.28)
Weighted average common shares outstanding—basic	36,573	35,241	35,225	32,370	32,112	30,279	28,903	28,566	34,865	29,976	25,044
Net loss per common share—diluted:
Net loss attributable to common shares—diluted:	$ (0.73)	$ (0.89)	$ (0.69)	$ (1.18)	$ (1.39)	$ (1.55)	$ (2.20)	$ (1.74)	$ (3.46)	$ (6.83)	$ (4.28)
Weighted average common shares outstanding—diluted	36,573	35,241	35,225	32,370	32,112	30,279	28,903	28,566	34,865	29,976	25,044
Retail
Revenue, net
Total net revenue									$ 1,434,974	$ 1,800,187	$ 1,728,104
Cost of goods sold
Total cost of goods sold									1,147,025	1,452,195	1,392,558
Other
Revenue, net
Total net revenue									24,444	21,405	16,652
Cost of goods sold
Total cost of goods sold									$ 19,300	$ 15,489	$ 11,647