Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 1,188	$ 236
Prepaid expenses and other current assets	12	10
Intangible digital assets	6	4
Total current assets	1,206	250
Non-current assets
Property and equipment, at cost, net	1,553	1,872
Right of use asset, operating lease, net of accumulated amortization	51	56
Other assets	123	123
Total assets	2,933	2,301
Current liabilities
Accounts payable	1,562	1,261
Accrued expenses and other payables	30	242
Note payable, net of discount	67	5
Operating lease liability	26	23
Derivative liability	313	246
Total current liabilities	1,998	1,777
Non-current liabilities
SBA PPP Note
Operating lease liability	25	33
Total liabilities	2,023	1,810
Commitments and Contingencies (Note 9)
Stockholders' Equity
Common stock, $0.001 par value; 2,500,000,000 shares authorized; 536,649,911 and 506,779,781 shares issued and outstanding at March 31, 2021 and December 31, 2020, respectively.	537	507
Additional paid-in capital	419,343	418,373
Accumulated deficit	(418,970)	(418,389)
Total stockholders' equity	910	491
Total Liabilities and Stockholders' Equity	2,933	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