Organization and Basis of Presentation	12 Months Ended
Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Basis of Presentation	Note 1. Organization and Basis of Presentation Organization MGT Capital Investments, Inc. (“MGT Capital”) is a Delaware corporation, incorporated in 2000. MGT Capital was originally incorporated in Utah in 1977. “MGT” or the “Company” is comprised of the parent company, wholly–owned subsidiaries MGT Cybersecurity, Inc. (“MGT Cybersecurity”), Medicsight, Inc. , MGT Sports, Inc. , MGT Studios, Inc. (“MGT Studios”), MGT Interactive, LLC, MGT Gaming, Inc., MGT Mining One, Inc. and MGT Mining Two, Inc. MGT Studios also owns a controlling minority interest in the subsidiary M2P Americas, Inc. MGT’s corporate office is located in Durham, North Carolina. On March 23, 2018, the Company’s shareholders approved an increase in the Company’s authorized common stock from 75,000,000 shares to 125,000,000 shares. On March 23, 2018, the Company filed an amendment to its Articles of Incorporation with the state of Delaware to reflect this change. On March 23, 2018, the Company’s shareholders approved a 1-for-2 reverse split of the Company’s common stock, to be effected only if needed for the Company’s application to uplist its common stock to a national exchange. As of March 23, 2018, the Company had not amended its Articles of Incorporation to reflect this reverse split and such adjustments are not reflected within these consolidated financial statements. Cryptocurrency mining In September 2016, MGT commenced its Bitcoin mining operations in the Wenatchee Valley area of central Washington. Throughout 2017 the Company expanded its mining capacity with the purchase of additional miners and by entering into hosting and power agreements with Washington facilities owners. The Company also entered into management agreements with third party investors whereby the investors purchased the mining hardware, and the Company will receive both a fee to manage the mining operations plus one-half of the net operating profit. In the year ended December 31, 2017, the Company mined approximately 856 coins and recorded $3,134 in revenue. Due to the lack of availability of adequate electric power in Washington to support the Company’s growth, the Company decided to move its principal operations to northern Sweden at the end of 2017. During the first quarter of 2018, the Company took delivery of additional Bitcoin mining machines in Sweden and moved or sold most of its Bitcoin mining machines from Washington. The Company plans to continue growing its mining capacity in Sweden during 2018. As of March 30, 2018, MGT owned and operated approximately 500 miners located in a leased facility in Quincy, Washington and 4,200 miners located in a leased facility in Sweden. In addition, the Company operates about 2,000 miners in the Sweden location pursuant to management agreements. All miners owned or managed by MGT are S9 Antminers sold by Bitmain Technologies LTD. At full deployment expected in April 2018, our total bitcoin mining capacity, as measured by computational hashing rate, is approximately 90 PH/s. In addition to the S9 Antminers, the Company owns 50 custom designed GPU-based Ethereum mining rigs. Legacy business – cybersecurity On January 26, 2018, the Company announced the end of its business relationship with cybersecurity pioneer John McAfee. Since August 2017, Mr. McAfee had served as Chief Cybersecurity Visionary of the Company, guiding the development of the Company’s cybersecurity business, including Sentinel, an enterprise class network intrusion detector released in October 2017. The Company also owned the intellectual property associated with developing and marketing a mobile privacy phone with extensive privacy and anti-hacking features. On March 19, 2018, the Company announced it has ended its cybersecurity operations by selling the Sentinel product line to a new entity formed by the unit’s management team and stopping development of the privacy phone. The Sentinel assets were sold for consideration of $60 in cash and a $1,000 promissory note, convertible into a 20% equity interest of the buyer. Basis of presentation The accompanying consolidated financial statements for the years ended December 31, 2017 and 2016 have been prepared in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”) and applicable rules and regulations of the United States Securities and Exchange Commission (“SEC”).

Organization and Basis of Presentation

12 Months Ended

Dec. 31, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Note 1. Organization and Basis of Presentation

Organization

MGT Capital Investments, Inc. (“MGT Capital”) is a Delaware corporation, incorporated in 2000. MGT Capital was originally incorporated in Utah in 1977. “MGT” or the “Company” is comprised of the parent company, wholly–owned subsidiaries MGT Cybersecurity, Inc. (“MGT Cybersecurity”), Medicsight, Inc. , MGT Sports, Inc. , MGT Studios, Inc. (“MGT Studios”), MGT Interactive, LLC, MGT Gaming, Inc., MGT Mining One, Inc. and MGT Mining Two, Inc. MGT Studios also owns a controlling minority interest in the subsidiary M2P Americas, Inc. MGT’s corporate office is located in Durham, North Carolina.

On March 23, 2018, the Company’s shareholders approved an increase in the Company’s authorized common stock from 75,000,000 shares to 125,000,000 shares. On March 23, 2018, the Company filed an amendment to its Articles of Incorporation with the state of Delaware to reflect this change.

On March 23, 2018, the Company’s shareholders approved a 1-for-2 reverse split of the Company’s common stock, to be effected only if needed for the Company’s application to uplist its common stock to a national exchange. As of March 23, 2018, the Company had not amended its Articles of Incorporation to reflect this reverse split and such adjustments are not reflected within these consolidated financial statements.

Cryptocurrency mining

In September 2016, MGT commenced its Bitcoin mining operations in the Wenatchee Valley area of central Washington. Throughout 2017 the Company expanded its mining capacity with the purchase of additional miners and by entering into hosting and power agreements with Washington facilities owners. The Company also entered into management agreements with third party investors whereby the investors purchased the mining hardware, and the Company will receive both a fee to manage the mining operations plus one-half of the net operating profit. In the year ended December 31, 2017, the Company mined approximately 856 coins and recorded $3,134 in revenue.

Due to the lack of availability of adequate electric power in Washington to support the Company’s growth, the Company decided to move its principal operations to northern Sweden at the end of 2017. During the first quarter of 2018, the Company took delivery of additional Bitcoin mining machines in Sweden and moved or sold most of its Bitcoin mining machines from Washington. The Company plans to continue growing its mining capacity in Sweden during 2018.

As of March 30, 2018, MGT owned and operated approximately 500 miners located in a leased facility in Quincy, Washington and 4,200 miners located in a leased facility in Sweden. In addition, the Company operates about 2,000 miners in the Sweden location pursuant to management agreements. All miners owned or managed by MGT are S9 Antminers sold by Bitmain Technologies LTD. At full deployment expected in April 2018, our total bitcoin mining capacity, as measured by computational hashing rate, is approximately 90 PH/s. In addition to the S9 Antminers, the Company owns 50 custom designed GPU-based Ethereum mining rigs.

Legacy business – cybersecurity

On January 26, 2018, the Company announced the end of its business relationship with cybersecurity pioneer John McAfee. Since August 2017, Mr. McAfee had served as Chief Cybersecurity Visionary of the Company, guiding the development of the Company’s cybersecurity business, including Sentinel, an enterprise class network intrusion detector released in October 2017. The Company also owned the intellectual property associated with developing and marketing a mobile privacy phone with extensive privacy and anti-hacking features.

On March 19, 2018, the Company announced it has ended its cybersecurity operations by selling the Sentinel product line to a new entity formed by the unit’s management team and stopping development of the privacy phone. The Sentinel assets were sold for consideration of $60 in cash and a $1,000 promissory note, convertible into a 20% equity interest of the buyer.

Basis of presentation

The accompanying consolidated financial statements for the years ended December 31, 2017 and 2016 have been prepared in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”) and applicable rules and regulations of the United States Securities and Exchange Commission (“SEC”).