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Liquidity and Going Concern (Details Narrative) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 12 Months Ended
Dec. 18, 2015
Nov. 09, 2015
Mar. 06, 2015
Feb. 28, 2014
Nov. 30, 2013
Dec. 31, 2015
Dec. 31, 2014
Cash balances           $ 900  
Working capital deficit           8,900  
Net proceeds from direct offering $ 6,100   $ 6,100 $ 9,300      
Purchase of common stock           $ 6,393 $ 11,880
Convertible Secured Debt Facility [Member]              
Debt maturity date         Dec. 31, 2016    
Secured loan agreement         $ 8,000    
February 4, 2016 [Member]              
Number of shares sold by company during peirod           296,667  
Sale of stock price per share           $ 2.82  
Net proceeds from direct offering           $ 800  
March 31, 2016 [Member]              
Cash balances           900  
Net proceeds from direct offering           $ 800  
Two Common Stock Purchase Agreements [Member] | February 3, 2016 [Member] | Aspire Capital [Member]              
Agreement term           24 months  
Purchase of common stock           $ 10,000  
ATM Sales Agreement [Member]              
Available for future sales           5,600  
ATM Sales Agreement [Member] | Maximum [Member]              
Net proceeds from direct offering           15,000  
ATM Sales Agreement [Member] | March 12, 2016 [Member]              
Available for future sales           5,600  
SPAs [Member]              
Available for future sales           $ 10,000  
Resource Capital Fund V LP [Member] | Loan Agreement [Member]              
Debt maturity date           Dec. 31, 2016  
Laramide Resources [Member] | Letter of Intent [Member]              
Proceeds from sale properties   $ 5,250