Consolidated Statement of Changes in Stockholders' (Deficit) Equity - USD ($) $ in Thousands	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Total (Deficit) Equity Attributable [Member]	Non-controlling Interest [Member]	Total
Balance at Dec. 31, 2017		$ 59	$ 390,736	$ (378,900)	$ 11,895	$ (22)	$ 11,873
Balance, shares at Dec. 31, 2017		58,963,009
Stock based compensation		$ 3	4,354		4,357		4,357
Stock based compensation, shares		2,860,000
Forfeiture of unvested restricted stock		$ (1)	(232)		(233)		(233)
Forfeiture of unvested restricted stock, shares		(550,000)
Forfeiture of vested restricted stock		$ (2)	2
Forfeiture of vested restricted stock, shares		(1,966,666)
Stock issued for services		$ 2	2,270		2,272		2,272
Stock issued for services, shares		2,387,273
Stock issued for prior year notes payable conversion		$ 3	(3)
Stock issued for prior year notes payable conversion, shares		3,381,816
Sale of stock in connection with private placement			80		80		80
Sale of stock in connection with private placement, shares		200,000
Sale of stock in connection with equity purchase agreement		$ 34	2,425		2,459		2,459
Sale of stock in connection with equity purchase agreement, shares		33,650,000
Issuance of common stock for prior year sale		$ 2	(2)
Issuance of common stock for prior year sale, shares		2,000,000
Exercise of warrants		$ 11	896		907		907
Exercise of warrants, shares		10,094,251
Stock issued in disposition of cybersecurity assets			120		120		120
Stock issued in disposition of cybersecurity assets, shares		60,000
Warrant modification expense			139		139		139
Deemed dividend			2,514	(2,514)
Reclassification of non-controlling interest to accumulated deficit				(22)	(22)	22
Net loss				(23,283)	(23,283)		(23,283)
Balance at Dec. 31, 2018		$ 111	403,299	(404,719)	(1,309)		(1,309)
Balance, shares at Dec. 31, 2018		111,079,683
Stock-based compensation - employee restricted stock			2,249		2,249		2,249
Stock-based compensation - employee restricted stock, shares
Stock issued for services			60		60		60
Stock issued for services, shares		160,500
Sale of stock in connection with equity purchase agreement		$ 119	5,216		5,335		$ 5,335
Sale of stock in connection with equity purchase agreement, shares		119,000,000
Issuance of common stock for prior year sale, shares							43,100,000
Exercise of warrants		$ 4	116		120		$ 120
Exercise of warrants, shares		4,000,000
Warrant modification expense
Deemed dividend			1,005	(1,005)
Cumulative effect adjustment related to ASU adoption				3	3		3
Common stock issued on conversion of notes payable		$ 124	2,614		2,738		2,738
Common stock issued on conversion of notes payable, shares		124,089,191
Stock sold in connection with registered direct placements		$ 18	507		525		525
Stock sold in connection with registered direct placements, shares		17,500,000
Sale of preferred stock			1,990		1,990		1,990
Sale of preferred stock, shares
Conversion of preferred stock		$ 28	(28)
Conversion of preferred stock, shares		27,605,667
Cancellation of shares received from transfer agent
Cancellation of shares received from transfer agent, shares		(83,752)
Issuance of common stock for mining assets		$ 10	301		311		311
Issuance of common stock for mining assets, shares		10,250,000
Warrant buy-back and cancellation			(14)		(14)		(14)
Issuance of stock based compensation - employee restricted stock		$ 0	0
Issuance of stock based compensation - employee restricted stock, shares		100,000
Net loss				(8,781)	(8,781)		(8,781)
Balance at Dec. 31, 2019		$ 414	$ 417,315	$ (414,502)	$ 3,227		$ 3,227
Balance, shares at Dec. 31, 2019	115	413,701,289