Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Deferred financing costs (Details)

v3.10.0.1
Summary of Significant Accounting Policies - Deferred financing costs (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Current deferred financing costs $ 121 $ 121
Deferred financing costs $ 213 $ 334
Computer Equipment [Member]    
Estimated life 3 years  
Software [Member]    
Estimated life 3 years  
Lost Creek Project    
Estimated life 10 years  
Maximum | Plant enclosure and equipment    
Estimated life 20 years