Subsequent Events (Details Narrative) $ in Thousands				12 Months Ended
	Mar. 13, 2019 USD ($) shares	Jan. 22, 2019 shares	Jan. 14, 2019 USD ($) a lot shares	Dec. 31, 2018 shares	Dec. 31, 2017 shares
Number of securities issued
Series A Preferred Stock [Member]
Number of securities issued				27,898
Common Stock [Member]
Number of securities issued				3,441,939
Subsequent Event [Member] | Series A Preferred Stock [Member]
Number of share conversion		27,898
Subsequent Event [Member] | Common Stock [Member]
Number of share conversion		697,450
Subsequent Event [Member] | Gadsden Roseville, LLC [Member] | Roseville Road in Sacramento, California [Member]
Area of land | a			9.6
Number of small lot single family detached homes | lot			65
Subsequent Event [Member] | Stock Purchase Agreement [Member] | Gadsden Growth Properties, Inc. [Member]
Number of securities issued	211,573
Description of Contract NAV	If the Contract NAV is more than the Gadsden final net asset value, then the difference (the “Shortfall”) will be settled by the transfer of shares of FC Global Common Stock, at a value equal to 3.771023733 shares of FC Global Common Stock for each $1.00 of Shortfall if the Gadsden final net asset value is $80 million or more (and 2.860407207 for each $1.00 of Shortfall to the extent that the Gadsden final net asset value is less $80 million);
Description of stock transaction is subject to the satisfaction or waiver	The Company shall have, on a consolidated basis, not less than $800 of unrestricted cash; and the Company shall have received a letter of resignation from each member of its Board of Directors, other than the directors who are to be members of the Board after the Stock Transaction.
Termination fee | $	$ 200
Cash | $	800
Subsequent Event [Member] | Stock Purchase Agreement [Member] | Gadsden Growth Properties, Inc. [Member] | Director [Member]
Professional fees | $	250
Subsequent Event [Member] | Stock Purchase Agreement [Member] | Gadsden Growth Properties, Inc. [Member] | Chief Executive Officer [Member]
Professional fees | $	$ 100,000
Subsequent Event [Member] | Stock Purchase Agreement [Member] | Gadsden Growth Properties, Inc. [Member] | 7% Series A Cumulative Convertible Perpetual Preferred Stock [Member]
Number of shares issued in acquisition	889,075
Subsequent Event [Member] | Stock Purchase Agreement [Member] | Gadsden Growth Properties, Inc. [Member] | Series B Non-Voting Convertible Preferred Stock [Member]
Number of shares issued in acquisition	11,788,994
Subsequent Event [Member] | Stock Purchase Agreement [Member] | Gadsden Growth Properties, Inc. [Member] | 10% Series C Cumulative Convertible Preferred Stock [Member]
Number of shares issued in acquisition	2,498,682
Subsequent Event [Member] | Stock Purchase Agreement [Member] | Gadsden Growth Properties, Inc. [Member] | Common Stock [Member]
Number of shares issued in acquisition	708,485,395
Ownership percentage	96.28%
Percentage of voting interests acquired	0.00%
Number of securities issued	430,306
Subsequent Event [Member] | Stock Purchase Agreement [Member] | Gadsden Growth Properties, Inc. [Member] | Holdback Shares [Member]
Number of shares issued in acquisition	278,178,750
Subsequent Event [Member] | Merger Agreement [Member] | Gadsden Growth Properties, Inc. [Member]
Cash | $			$ 350,000
Subsequent Event [Member] | Amended And Restated Agreement [Member] | Gadsden Roseville, LLC [Member] | Series A Preferred Stock [Member]
Number of shares purchased			1,000