Liquidity (Details Narrative) - USD ($) $ / shares in Units, $ in Thousands							1 Months Ended			9 Months Ended
	Nov. 09, 2017	Sep. 25, 2017	Apr. 14, 2017	Feb. 16, 2017	Jan. 19, 2017	Dec. 05, 2016	Sep. 30, 2017	Feb. 28, 2017	Jan. 31, 2017	Sep. 30, 2017	Dec. 31, 2016
Working capital							$ 8,200			$ 8,200	$ 4,200
Increase in working capital										12,400
Net proceeds from direct offering					$ 8,900		2,000	$ 4,500	$ 8,900
Cash balances							3,700			3,700	$ 4,000
Number of common shares issued value										15,182
Sale of common stock shares					1,399,140
Aspire Capital Fund LLC [Member]
Net proceeds from direct offering				$ 4,500
Sale of common stock shares				2,100,000
Common Stock Purchase Agreement [Member] | Aspire Capital Fund LLC [Member]
Number of common shares issued value	$ 20,000
Available for future sales	22,000
Number of common stock shares issued to commitment fee		880,000
Average price per shares issued		$ 1.38
Common Stock Purchase Agreement [Member] | Aspire Capital Fund LLC [Member] | Maximum [Member]
Available for future sales		$ 22,000
Sale of common stock shares		5,033,677
November 9, 2017 [Member] | Common Stock Purchase Agreement [Member] | Aspire Capital Fund LLC [Member]
Available for future sales							20,000			$ 20,000
Number of common stock shares limited to current Exchange Cap										2,700,000
ATM Offering [Member]
Net proceeds from direct offering			$ 30,000
Available for future sales	$ 28,900
Sale of common stock shares	673,853
RCF Loan [Member]
Repayment of outstanding amount										$ 5,500
Laramide Resources Ltd [Member]
Cash balances							2,200			2,200
Promissory debt							5,000			$ 5,000
Number of common shares issued						2,218,333				2,218,333
Number of common shares issued value										$ 500
Warrant to purchase of common stock						2,218,333				2,218,333
Fair value of warrants										$ 300
Laramide Resources Ltd [Member] | January 2018 [Member]
Promissory debt							1,500			1,500
Cantor Fitzgerald & Co [Member] | ATM Offering [Member]
Net proceeds from direct offering										30,000
Cantor Fitzgerald & Co [Member] | ATM Offering [Member] | November 9, 2017 [Member]
Available for future sales							$ 28,900			$ 28,900