Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 739	$ 236
Prepaid expenses and other current assets	129	10
Intangible digital assets		4
Total current assets	868	250
Non-current assets
Property and equipment, at cost, net	1,362	1,872
Right of use asset, operating lease, net of accumulated amortization	46	56
Other assets	3	123
Total assets	2,279	2,301
Current liabilities
Accounts payable	1,332	1,261
Accrued expenses and other payables	72	242
Convertible note payable, net of discount	240	5
Operating lease liability	28	23
Derivative liability	107	246
Total current liabilities	1,779	1,777
Non-current liabilities
Operating lease liability	18	33
Total liabilities	1,797	1,810
Stockholders’ Equity
Preferred stock value
Common stock, $0.001 par value; 2,500,000,000 shares authorized; 541,411,816 and 506,779,781 shares issued and outstanding at June 30, 2021 and December 31, 2020, respectively.	541	507
Additional paid-in capital	419,576	418,373
Accumulated deficit	(419,635)	(418,389)
Total stockholders’ equity	482	491
Total Liabilities and Stockholders’ Equity	2,279	2,301
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