Annual report pursuant to Section 13 and 15(d)

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

v3.19.3.a.u2
Summary of Significant Accounting Policies - Deferred financing costs (Details)
12 Months Ended
Dec. 31, 2019
Computer Equipment [Member]  
Estimated life 3 years
Software [Member]  
Estimated life 3 years
Lost Creek Project  
Estimated life 10 years
Maximum  
Deferred revenue contract period 5 years
Maximum | Plant enclosure and equipment  
Estimated life 20 years
Minimum  
Deferred revenue contract period 2 years