Subsequent events	12 Months Ended
Dec. 31, 2015
Subsequent events [Abstract]
Subsequent events [Text Block]	Note 17. Subsequent events On March 24, 2016 (the “Effective Date”), the Company entered into an Exchange Agreement (the “Agreement”) with DraftDay Fantasy Sports, Inc. (“DraftDay”). The purpose of the Agreement was to exchange that certain outstanding promissory note (the “Note”) in the principal amount of $1,875 issued on September 8, 2015, for other equity and debt securities of DraftDay, after the Note went into default on March 8, 2016. On the Effective Date, the Note had an outstanding principal balance of $1,875 and accrued interest in the amount of $51 (the “Interest”). Pursuant to the Agreement, a portion consisting of $825 of the outstanding principal of the Note was exchanged for 2,748,353 shares of DraftDay’s common stock, and an additional portion of $110 of the outstanding principal was exchanged for 110 shares (the “Preferred Shares”) of a newly created class of preferred stock, the Series D Convertible Preferred Stock. The Preferred Shares are convertible into an aggregate of 366,630 shares of DraftDay’s common stock, except that conversions shall not be effected to the extent that, after issuance of the conversion shares, MGT’s aggregate beneficial ownership (together with that of its affiliates) would exceed 9.99%. Finally, DraftDay agreed to make a cash payment to MGT Sports for the total amount of Interest. In exchange for the forgoing, MGT Sports and the Company agreed to waive all Events of Default under the Note prior to the Effective Date and to release DraftDay from any rights, remedies and claims related thereto. After giving effect to the forgoing, the remaining outstanding principal balance of the Note is $940 (the “Remaining Balance”). The Remaining Balance of the Note shall continue to accrue interest a rate of 5% per annum, and all terms of the Note shall remain unchanged except that the maturity date is changed to July 31, 2016.

Note 17. Subsequent events

On March 24, 2016 (the “Effective Date”), the Company entered into an Exchange Agreement (the “Agreement”) with DraftDay Fantasy Sports, Inc. (“DraftDay”). The purpose of the Agreement was to exchange that certain outstanding promissory note (the “Note”) in the principal amount of $1,875 issued on September 8, 2015, for other equity and debt securities of DraftDay, after the Note went into default on March 8, 2016.

On the Effective Date, the Note had an outstanding principal balance of $1,875 and accrued interest in the amount of $51 (the “Interest”). Pursuant to the Agreement, a portion consisting of $825 of the outstanding principal of the Note was exchanged for 2,748,353 shares of DraftDay’s common stock, and an additional portion of $110 of the outstanding principal was exchanged for 110 shares (the “Preferred Shares”) of a newly created class of preferred stock, the Series D Convertible Preferred Stock. The Preferred Shares are convertible into an aggregate of 366,630 shares of DraftDay’s common stock, except that conversions shall not be effected to the extent that, after issuance of the conversion shares, MGT’s aggregate beneficial ownership (together with that of its affiliates) would exceed 9.99%. Finally, DraftDay agreed to make a cash payment to MGT Sports for the total amount of Interest. In exchange for the forgoing, MGT Sports and the Company agreed to waive all Events of Default under the Note prior to the Effective Date and to release DraftDay from any rights, remedies and claims related thereto. After giving effect to the forgoing, the remaining outstanding principal balance of the Note is $940 (the “Remaining Balance”). The Remaining Balance of the Note shall continue to accrue interest a rate of 5% per annum, and all terms of the Note shall remain unchanged except that the maturity date is changed to July 31, 2016.