Liquidity (Details Narrative) - USD ($) $ in Thousands				1 Months Ended		6 Months Ended
	Apr. 14, 2017	Jan. 19, 2017	Dec. 05, 2016	Feb. 28, 2017	Jan. 31, 2017	Jun. 30, 2017	Dec. 31, 2016
Working capital						$ 8,400	$ 4,300
Increase in working capital						12,700
Net proceeds from direct offering		$ 8,900		$ 4,500	$ 8,900
Cash balances						3,900	$ 4,000
Number of common shares issued value						13,705
ATM Offering [Member]
Net proceeds from direct offering	$ 30,000
RCF Loan [Member]
Repayment of remaining outstanding amount						5,500
Laramide Resources Ltd [Member]
Cash balances						2,200
Promissory debt						$ 5,000
Number of common shares issued			2,218,333			2,218,333
Number of common shares issued value						$ 600
Warrant to purchase of common stock			2,218,333			2,218,333
Fair value of warrants						$ 300
Laramide Resources Ltd [Member] | Due Within 12 Months [Member]
Promissory debt						1,500
Cantor Fitzgerald & Co [Member] | ATM Offering [Member]
Net proceeds from direct offering						30,000
Cantor Fitzgerald & Co [Member] | ATM Offering [Member] | August 11, 2017 [Member]
Available for future sales						$ 29,200