Organization and Basis of Presentation (Details Narrative) - USD ($) $ in Thousands			3 Months Ended	6 Months Ended
	Jul. 15, 2019	Jun. 25, 2019	Jun. 30, 2019	Jun. 30, 2019	Jun. 30, 2018	Jun. 04, 2019	Feb. 27, 2019	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Common stock, shares authorized			2,500,000,000	2,500,000,000			125,000,000	2,500,000,000
Common stock shares outstanding			270,957,766	270,957,766				111,079,683
Sale of stock, number of shares issued in transaction		30,500,000
Proceeds from sale of common stock		$ 1,291		$ 525	$ 80
Description on Cryptocurrency mining				Following a review of its Bitcoin mining operations, the Company has determined to consolidate its activities going forward in Company-owned and managed facilities. Central to this strategy is the recent purchase of land in LaFayette, GA and the entry into a favorable contract for electricity there. Located adjacent to a utility substation, the several acre property has access to over 20 megawatts (MW) of low-cost power. MGT has also ordered transformers with a total load capacity of 12.5 MW to accommodate the first phase of this project and has begun the construction and physical site development. The facility will accommodate shipping containers racked with miners with individual capacities of up to 1 MW. The Company's agreements with third-party hosting facilities allow for reduced commitments and provide for flexibility to deploy miners at the new Georgia location upon its readiness. MGT is now mining with 1,260 Bitmain S9's in Colorado Springs, representing its entire commitment in this location. In Coshocton, Ohio, MGT is now operating approximately 1,000 S9 miners, including miners in the first Pod5ive container delivered in late July. The Company is contractually committed to a total of 1,800 miners in Ohio, with full deployment dependent upon the speed of the facility buildout by its third-party partner.
Revenue related to hosting arrangement				$ 47
0.01 Bitcoin [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Revenue on mining			$ 70
7.83 Bitcoin [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Revenue on mining				98
Investor-owned Machines, Equaling 38.00 Bitcoin [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Outstanding hosting service fees			$ 309	$ 309
Subsequent Event [Member] | Bitmaintech Pte. Ltd [Member] | Purchase Agreement for purchase 1,100 Antminer S17 Bitcoin Miners [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Aggregate purchase price	$ 2,770,000
Maximum [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Common stock shares outstanding						76,558,643