UNAUDITED CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN SHAREHOLDERS' EQUITY - 3 months ended Mar. 31, 2016 - USD ($) $ in Thousands	Common Stock [Member]	Preferred Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Total
Balances at beginning at Dec. 31, 2015	$ 282		$ 124,898	$ (109,705)	$ 15,475
Balances at beginning (in shares) at Dec. 31, 2015	28,199,735
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon vesting of restricted common stock, net
Issuance of common stock upon vesting of restricted common stock, net (in shares)	33,333
Stock-based compensation			$ 34		$ 34
Issuance of Series A Converible Preferred Stock in disposition of mining segment		$ 1	$ 1,999		2,000
Issuance of Series A Converible Preferred Stock in disposition of mining segment (in shares)		50,000
Net loss				$ (10,602)	(10,602)
Balances at end at Mar. 31, 2016	$ 282	$ 1	$ 126,931	$ (120,307)	$ 6,907
Balances at end (in shares) at Mar. 31, 2016	28,233,068	50,000