Ur-Energy Inc. Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Sales (Details)

Sales (Details) $ in Thousands	12 Months Ended
Sales (Details) $ in Thousands	Dec. 31, 2017 USD ($) item	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Sales
Number of Sales Contracts with Delivery Obligations \| item	2
Sales Revenue, Goods, Gross	$ 38,291	$ 22,191
Revenue, Net, Total	38,368	27,305	$ 41,877
Disposal fee income	77	29
Recognition of gain from sale of deliveries under assignment		5,085
Company A [Member] \| Sales Revenue, Goods, Net [Member]
Sales
Sales Revenue, Goods, Net	7,821
Company B [Member] \| Sales Revenue, Goods, Net [Member]
Sales
Sales Revenue, Goods, Net	3,141	12,741
Company B [Member] \| Sale Of Purchased Inventory [Member]
Sales
Sales Revenue, Goods, Net	10,212
Company C [Member] \| Sales Revenue, Goods, Net [Member]
Sales
Sales Revenue, Goods, Net	1,777
Company C [Member] \| Sale Of Purchased Inventory [Member]
Sales
Sales Revenue, Goods, Net	15,340
Company D [Member] \| Sales Revenue, Goods, Net [Member]
Sales
Sales Revenue, Goods, Net		6,375
Company E [Member] \| Sales Revenue, Goods, Net [Member]
Sales
Sales Revenue, Goods, Net		3,075
Company A, B, C, D, E [Member] \| Sales Revenue, Goods, Net [Member]
Sales
Sales Revenue, Goods, Net	12,739	$ 22,191
Company B and C [Member] \| Sale Of Purchased Inventory [Member]
Sales
Sales Revenue, Goods, Net	$ 25,552
Customer Concentration Risk [Member]
Sales
Total sales, risk percent	99.80%	81.30%
Concentration Risk, Percentage	100.00%	100.00%
Disposal Fee Income Concentration Risk Percentage	0.2	0.1
Recognition of gain from sale of deliveries under assignment, Percentage	0.00%	18.60%
Customer Concentration Risk [Member] \| Company A [Member] \| Sales Revenue, Goods, Net [Member]
Sales
Concentration Risk, Percentage	20.40%	0.00%
Customer Concentration Risk [Member] \| Company B [Member] \| Sales Revenue, Goods, Net [Member]
Sales
Concentration Risk, Percentage	8.20%	46.70%
Customer Concentration Risk [Member] \| Company B [Member] \| Sale Of Purchased Inventory [Member]
Sales
Concentration Risk, Percentage	26.60%	0.00%
Customer Concentration Risk [Member] \| Company C [Member] \| Sales Revenue, Goods, Net [Member]
Sales
Concentration Risk, Percentage	4.60%	0.00%
Customer Concentration Risk [Member] \| Company C [Member] \| Sale Of Purchased Inventory [Member]
Sales
Concentration Risk, Percentage	40.00%	0.00%
Customer Concentration Risk [Member] \| Company D [Member] \| Sales Revenue, Goods, Net [Member]
Sales
Concentration Risk, Percentage	0.00%	23.30%
Customer Concentration Risk [Member] \| Company E [Member] \| Sales Revenue, Goods, Net [Member]
Sales
Concentration Risk, Percentage	0.00%	11.20%
Customer Concentration Risk [Member] \| Company A, B, C, D, E [Member] \| Sales Revenue, Goods, Net [Member]
Sales
Concentration Risk, Percentage	33.20%	81.30%
Customer Concentration Risk [Member] \| Company B and C [Member] \| Sale Of Purchased Inventory [Member]
Sales
Concentration Risk, Percentage	66.60%	0.00%