STOCKHOLDERS' EQUITY (Notes)	3 Months Ended
Mar. 31, 2019
Equity [Abstract]
STOCKHOLDERS' EQUITY	STOCKHOLDERS' EQUITY Common Stock Each share of common stock has the right to one vote. The holders of common stock are also entitled to receive dividends declared by the Board of Directors out of funds legally available, subject to prior rights of holders of all classes of stock outstanding having priority rights as to dividends. No dividends have been declared or paid on our common stock through March 31, 2019. Preferred Stock Each share of Series A Preferred and each share of Series B Preferred (collectively the "preferred shares") is intended to have voting and dividend rights similar to those of one share of common stock. Preferred shares rank senior to common stock with respect to dividends. Holders of the preferred shares will be entitled to an annual cash dividend of $0.16 per share, in preference to any dividend payment to the holders of the common stock, out of funds of the Company legally available for payment of dividends and subject to declaration by our Board of Directors. Holders of the preferred shares are also entitled to participate in any cash dividends we pay to the holders of the common stock and are also entitled to participate in non-cash dividends we pay to holders of the common stock, subject to potentially different treatment if we effect a stock dividend, stock split, or combination of the common stock. There are no arrearages in cumulative preferred dividends. We declared and paid a cash dividend of $0.16 per share on our preferred stock during 2017 and 2018. Neither the Series A Preferred nor Series B Preferred is required to be converted into or exchanged for shares of our common stock or any other entity; however, at our sole discretion, we may convert the Series A Preferred shares into Series B Preferred shares at any time on a one-to-one basis. Until the third anniversary of the original issuance date, we may redeem, at our discretion, both the Series A and Series B Preferred shares for an amount equal to the highest of the following: (1) the subscription price plus any accrued but unpaid dividends, (2) 105% of the average trading price of our common stock during a five-trading-day period and (3) 105% of the average trading price of the series of preferred shares during the same five-day-trading period. In the event of any liquidation, any amount available for distribution to stockholders after payment of all liabilities will be distributed proportionately, with each share of Series A Preferred and each share of Series B Preferred being treated as though it were a share of our common stock. JonesTrading Sales Agreement In August 2018, we entered into a sales agreement with JonesTrading Institutional Services LLC ("JonesTrading"), under which we conducted "at the market" public offerings of our common stock from time to time. Under the sales agreement, JonesTrading, acting as our agent, may offer our common stock in the market on a daily basis or otherwise as we request from time to time. We have no obligation to sell additional shares under the sales agreement, but expect to do so from time to time. We will pay JonesTrading up to a 2.0% sales commission on all sales. The sales agreement contemplates sales of up to $150 million of our common stock over a period of up to three years. As of March 31, 2019, we had sold 5,097,410 shares of our common stock pursuant to the sales agreement and have received $134.5 million in proceeds, net of $3.1 million of offering costs, including commissions paid to JonesTrading. During the quarter ended March 31, 2019, we sold shares of common stock for $39.9 million, net of offering expenses (including commissions), of which $9.0 million was recorded as a receivable at March 31, 2019 and collected shortly thereafter. The average gross price per share of stock sold pursuant to the sales agreement during the quarter ended March 31, 2019 was $18.25. We sold the remaining capacity under the sales agreement with JonesTrading (745,737 shares) the first week in April 2019, raising additional gross proceeds of $12.4 million. tZERO Tokens On December 18, 2017, tZERO launched an offering (the "security token offering") of the right to acquire tZERO Preferred Equity Tokens (the "tZERO Security Token") through a Simple Agreement for Future Equity ("SAFE"). The security token offering closed on August 6, 2018, and on October 12, 2018 tZERO issued the tZERO Security Tokens in settlement of the SAFEs. tZERO Security Token holders have the right to, prior to distributing earnings to tZERO common shareholders, a noncumulative dividend equal to 10% of tZERO's consolidated Adjusted Gross Revenue (as defined by the security token offering documents) for the most recently completed fiscal quarter, if declared by tZERO's Board of Directors, to be paid out of funds lawfully available on a quarterly basis. tZERO Security Token holders are not entitled to participate in any dividends paid to the holders of tZERO's common stock, have no rights to vote, and have no rights to the undistributed earnings of tZERO and are not entitled to any utility functionality as part of the tZERO Security Tokens. Any remaining undistributed earnings or losses of tZERO for a period shall be allocated to the noncontrolling interest held by the tZERO Security Token holders based on the contractual participation rights of the security to share in those earnings as if all the earnings for the period had been distributed and the effect will be reflected in determining net income/(loss) per share under the two-class method. In the event of any liquidation, dissolution or winding up of tZERO, the tZERO Security Token holders will be entitled to the limited preferential liquidation rights equal to USD $0.10 per token to the extent funds are available. At December 31, 2018, cumulative proceeds since December 18, 2017 from the security token offering totaling $104.8 million, net of $22.0 million of withdrawals, have been classified as a component of noncontrolling interest within our consolidated financial statements. As of December 31, 2018, tZERO incurred $21.5 million of offering costs associated with the security token offering that are classified as a reduction in proceeds within noncontrolling interest of our consolidated financial statements. During the three months ended March 31, 2018, proceeds from the security token offering were $92.9 million, net of $11.4 million of withdrawals. During the three months ended March 31, 2018, tZERO incurred offering costs of $16.0 million. Warrants On November 8, 2017, we issued warrants to purchase up to a combined aggregate of 3,722,188 shares of our common stock to two purchasers in privately negotiated transactions, for an aggregate purchase price of $6.5 million, net of issuance costs. The exercise price for the warrants was $40.45 per share of common stock. On December 29, 2017, one of the warrant holders exercised its warrant in full and purchased a total of 2,472,188 shares of common stock for $100.0 million. On January 17, 2018, the other warrant holder exercised its warrant in full and purchased 1,250,000 shares of common stock for $50.6 million. GSR Agreement In August 2018, Overstock signed a Token Purchase Agreement with GSR Capital Ltd., a Cayman Islands exempted company ("GSR"). The Token Purchase Agreement sets forth the terms on which GSR agreed to purchase, for $30 million, on May 6, 2019 or such other date as may be agreed by the parties, security tokens at a price of $6.67 per security token. On May 8, 2019, the parties agreed to replace the Token Purchase Agreement with an executed Investment Agreement under which GSR purchased 508,710 shares of tZERO which represents approximately 0.5% of the issued and outstanding Common Stock of tZERO. In exchange, GSR agreed to transfer to tZERO a total $5.0 million in consideration, consisting of $1.0 million U.S. dollars, $1.0 million U.S. dollars' worth of Chinese Renminbi, and securities traded on the Hong Kong Stock Exchange with a market value of $3.0 million U.S. dollars.

STOCKHOLDERS' EQUITY

Common Stock

Each share of common stock has the right to one vote. The holders of common stock are also entitled to receive dividends declared by the Board of Directors out of funds legally available, subject to prior rights of holders of all classes of stock outstanding having priority rights as to dividends. No dividends have been declared or paid on our common stock through March 31, 2019.

Preferred Stock

Each share of Series A Preferred and each share of Series B Preferred (collectively the "preferred shares") is intended to have voting and dividend rights similar to those of one share of common stock. Preferred shares rank senior to common stock with respect to dividends. Holders of the preferred shares will be entitled to an annual cash dividend of $0.16 per share, in preference to any dividend payment to the holders of the common stock, out of funds of the Company legally available for payment of dividends and subject to declaration by our Board of Directors. Holders of the preferred shares are also entitled to participate in any cash dividends we pay to the holders of the common stock and are also entitled to participate in non-cash dividends we pay to holders of the common stock, subject to potentially different treatment if we effect a stock dividend, stock split, or combination of the common stock. There are no arrearages in cumulative preferred dividends. We declared and paid a cash dividend of $0.16 per share on our preferred stock during 2017 and 2018.

Neither the Series A Preferred nor Series B Preferred is required to be converted into or exchanged for shares of our common stock or any other entity; however, at our sole discretion, we may convert the Series A Preferred shares into Series B Preferred shares at any time on a one-to-one basis. Until the third anniversary of the original issuance date, we may redeem, at our discretion, both the Series A and Series B Preferred shares for an amount equal to the highest of the following: (1) the subscription price plus any accrued but unpaid dividends, (2) 105% of the average trading price of our common stock during a five-trading-day period and (3) 105% of the average trading price of the series of preferred shares during the same five-day-trading period. In the event of any liquidation, any amount available for distribution to stockholders after payment of all liabilities will be distributed proportionately, with each share of Series A Preferred and each share of Series B Preferred being treated as though it were a share of our common stock.

JonesTrading Sales Agreement

In August 2018, we entered into a sales agreement with JonesTrading Institutional Services LLC ("JonesTrading"), under which we conducted "at the market" public offerings of our common stock from time to time. Under the sales agreement, JonesTrading, acting as our agent, may offer our common stock in the market on a daily basis or otherwise as we request from time to time. We have no obligation to sell additional shares under the sales agreement, but expect to do so from time to time. We will pay JonesTrading up to a 2.0% sales commission on all sales. The sales agreement contemplates sales of up to $150 million of our common stock over a period of up to three years. As of March 31, 2019, we had sold 5,097,410 shares of our common stock pursuant to the sales agreement and have received $134.5 million in proceeds, net of $3.1 million of offering costs, including commissions paid to JonesTrading. During the quarter ended March 31, 2019, we sold shares of common stock for $39.9 million, net of offering expenses (including commissions), of which $9.0 million was recorded as a receivable at March 31, 2019 and collected shortly thereafter. The average gross price per share of stock sold pursuant to the sales agreement during the quarter ended March 31, 2019 was $18.25. We sold the remaining capacity under the sales agreement with JonesTrading (745,737 shares) the first week in April 2019, raising additional gross proceeds of $12.4 million.

tZERO Tokens

On December 18, 2017, tZERO launched an offering (the "security token offering") of the right to acquire tZERO Preferred Equity Tokens (the "tZERO Security Token") through a Simple Agreement for Future Equity ("SAFE"). The security token offering closed on August 6, 2018, and on October 12, 2018 tZERO issued the tZERO Security Tokens in settlement of the SAFEs. tZERO Security Token holders have the right to, prior to distributing earnings to tZERO common shareholders, a noncumulative dividend equal to 10% of tZERO's consolidated Adjusted Gross Revenue (as defined by the security token offering documents) for the most recently completed fiscal quarter, if declared by tZERO's Board of Directors, to be paid out of funds lawfully available on a quarterly basis. tZERO Security Token holders are not entitled to participate in any dividends paid to the holders of tZERO's common stock, have no rights to vote, and have no rights to the undistributed earnings of tZERO and are not entitled to any utility functionality as part of the tZERO Security Tokens. Any remaining undistributed earnings or losses of tZERO for a period shall be allocated to the noncontrolling interest held by the tZERO Security Token holders based on the contractual participation rights of the security to share in those earnings as if all the earnings for the period had been distributed and the effect will be reflected in determining net income/(loss) per share under the two-class method. In the event of any liquidation, dissolution or winding up of tZERO, the tZERO Security Token holders will be entitled to the limited preferential liquidation rights equal to USD $0.10 per token to the extent funds are available.

At December 31, 2018, cumulative proceeds since December 18, 2017 from the security token offering totaling $104.8 million, net of $22.0 million of withdrawals, have been classified as a component of noncontrolling interest within our consolidated financial statements. As of December 31, 2018, tZERO incurred $21.5 million of offering costs associated with the security token offering that are classified as a reduction in proceeds within noncontrolling interest of our consolidated financial statements. During the three months ended March 31, 2018, proceeds from the security token offering were $92.9 million, net of $11.4 million of withdrawals. During the three months ended March 31, 2018, tZERO incurred offering costs of $16.0 million.

Warrants

On November 8, 2017, we issued warrants to purchase up to a combined aggregate of 3,722,188 shares of our common stock to two purchasers in privately negotiated transactions, for an aggregate purchase price of $6.5 million, net of issuance costs. The exercise price for the warrants was $40.45 per share of common stock. On December 29, 2017, one of the warrant holders exercised its warrant in full and purchased a total of 2,472,188 shares of common stock for $100.0 million. On January 17, 2018, the other warrant holder exercised its warrant in full and purchased 1,250,000 shares of common stock for $50.6 million.

GSR Agreement

In August 2018, Overstock signed a Token Purchase Agreement with GSR Capital Ltd., a Cayman Islands exempted company ("GSR"). The Token Purchase Agreement sets forth the terms on which GSR agreed to purchase, for $30 million, on May 6, 2019 or such other date as may be agreed by the parties, security tokens at a price of $6.67 per security token. On May 8, 2019, the parties agreed to replace the Token Purchase Agreement with an executed Investment Agreement under which GSR purchased 508,710 shares of tZERO which represents approximately 0.5% of the issued and outstanding Common Stock of tZERO. In exchange, GSR agreed to transfer to tZERO a total $5.0 million in consideration, consisting of $1.0 million U.S. dollars, $1.0 million U.S. dollars' worth of Chinese Renminbi, and securities traded on the Hong Kong Stock Exchange with a market value of $3.0 million U.S. dollars.