Ur-Energy Inc. Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Sales (Details)

Sales (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
Sales (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Sales
Revenue, Net, Total	$ 11,693	$ 12,068	$ 38,342	$ 21,529
Disposal fee income			52	21
Recognition of gain from sale of deliveries under assignment				2,587
Sales Revenue, Goods, Net [Member]
Sales
Sales Revenue, Goods, Net			12,739	18,921
Sale Of Purchased Inventory [Member]
Sales
Sales Revenue, Goods, Net			25,551
Company A [Member]
Sales
Sales Revenue, Goods, Net			7,821
Company B [Member]
Sales
Sales Revenue, Goods, Net			3,141	9,471
Company B [Member] \| Sale Of Purchased Inventory [Member]
Sales
Sales Revenue, Goods, Net			10,211
Company C [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
Sales Revenue, Goods, Net				6,375
Company A, B, C, D [Member]
Sales
Sales Revenue, Goods, Net			$ 38,290	18,921
Company E [Member] \| Sales Revenue, Goods, Net [Member]
Sales
Sales Revenue, Goods, Net				$ 3,075
Customer Concentration Risk [Member]
Sales
Concentration Risk, Percentage			100.00%	100.00%
Disposal Fees Concentration Risk Percentage			0.10%	0.10%
Recognition of gain from sale of deliveries under assignment, Percentage			0.00%	12.00%
Customer Concentration Risk [Member] \| Sales Revenue, Goods, Net [Member]
Sales
Concentration Risk, Percentage			33.20%	87.90%
Customer Concentration Risk [Member] \| Sale Of Purchased Inventory [Member]
Sales
Concentration Risk, Percentage			66.60%	0.00%
Customer Concentration Risk [Member] \| Company A [Member]
Sales
Concentration Risk, Percentage			20.40%	0.00%
Customer Concentration Risk [Member] \| Company B [Member]
Sales
Concentration Risk, Percentage			8.20%	44.00%
Customer Concentration Risk [Member] \| Company B [Member] \| Sale Of Purchased Inventory [Member]
Sales
Concentration Risk, Percentage			26.50%	0.00%
Customer Concentration Risk [Member] \| Company C [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
Concentration Risk, Percentage			0.00%	29.60%
Customer Concentration Risk [Member] \| Company A, B, C, D [Member]
Sales
Concentration Risk, Percentage			99.90%	87.90%
Customer Concentration Risk [Member] \| Company E [Member] \| Sales Revenue, Goods, Net [Member]
Sales
Concentration Risk, Percentage			0.00%	14.20%