Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 461	$ 9,519
Prepaid expenses and other current assets	1,778	894
Digital currencies	22	48
Total current assets	2,261	10,461
Non-current assets
Property and equipment, net	9,148	3,116
Total assets	11,409	13,577
Current liabilities
Accounts payable	347	287
Accrued expenses	577	707
Other payables	615	710
Total current liabilities	1,539	1,704
Commitments and Contingencies
Stockholders' Equity
Common stock, $0.001 par value; 125,000,000 shares authorized; 66,127,626 and 58,963,009 shares issued and outstanding at March 31, 2018 and December 31, 2017, respectively.	66	59
Additional paid-in capital	395,789	390,736
Accumulated deficit	(385,963)	(378,900)
Total equity attributable to MGT stockholders	9,892	11,895
Non-controlling interest	(22)	(22)
Total equity	9,870	11,873
Total liabilities, stockholders' equity, redeemable convertible preferred stock and non-controlling interest	11,409	13,577
Series A Convertible Preferred Stock [Member]
Redeemable convertible preferred stock - temporary equity
Preferred stock, Series A Convertible Preferred, $0.001 par value, 83,840 shares authorized at March 31, 2018 and December 31, 2017. No shares issued or outstanding at March 31, 2018 and December 31, 2017.
Undesignated Preferred Stock [Member]
Stockholders' Equity
Undesignated preferred stock, $0.001 par value, 8,500,000 shares authorized at March 31, 2018 and December 31, 2017. No shares issued or outstanding at March 31, 2018 and December 31, 2017