Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 236	$ 216
Prepaid expenses and other current assets	10	125
Intangible digital assets	4	18
Total current assets	250	359
Non-current assets
Property and equipment, at cost, net	1,872	3,536
Right of use asset, operating lease, net of accumulated amortization	56	78
Other assets	123	321
Total assets	2,301	4,294
Current liabilities
Accounts payable	1,261	795
Accrued expenses and other payables	242	26
Convertible note payable, net of debt discount	5	52
Management agreement termination liability		116
Operating lease liability	23	19
Derivative liability	246
Total current liabilities	1,777	1,008
Non-current liabilities
Operating lease liability	33	59
Total liabilities	1,810	1,067
Commitments and Contingencies (Note 9)
Stockholders' Equity
Common stock, $0.001 par value; 2,500,000,000 shares authorized; 506,779,781 and 413,701,289 shares issued and outstanding at December 31, 2020 and 2019, respectively.	507	414
Additional paid-in capital	418,373	417,315
Accumulated deficit	(418,389)	(414,502)
Total stockholders' equity	491	3,227
Total Liabilities and Stockholders' Equity	2,301	4,294
Undesignated Preferred Stock [Member]
Stockholders' Equity
Preferred stock, value
Series B Preferred Stock [Member]
Stockholders' Equity
Preferred stock, value
Series C Convertible Preferred Stock [Member]
Stockholders' Equity
Preferred stock, value