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) $ in Thousands	3 Months Ended		6 Months Ended
Sales (Details) $ in Thousands	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)
Sales
Revenue, Net, Total	$ 11,821	$ 6,747	$ 26,649	$ 9,461
Disposal fee income			33	11
Sales Revenue, Goods, Net [Member]
Sales
Sales Revenue, Goods, Net			4,918	9,450
Sale Of Purchased Inventory [Member]
Sales
Sales Revenue, Goods, Net			21,698
Company A [Member] \| Sales Revenue, Goods, Net [Member]
Sales
Sales Revenue, Goods, Net			3,141
Company A [Member] \| Sale Of Purchased Inventory [Member]
Sales
Sales Revenue, Goods, Net			6,358
Company B [Member]
Sales
Sales Revenue, Goods, Net			1,777
Company B [Member] \| Sale Of Purchased Inventory [Member]
Sales
Sales Revenue, Goods, Net			15,340
Company C [Member]
Sales
Sales Revenue, Goods, Net				6,375
Company D [Member] \| Sales Revenue, Goods, Net [Member]
Sales
Sales Revenue, Goods, Net				3,075
Company A, B, C, D [Member]
Sales
Sales Revenue, Goods, Net			$ 26,616	$ 9,450
Customer Concentration Risk [Member]
Sales
Concentration Risk, Percentage			100.00%	100.00%
Disposal Fee Income Concentration Risk Percentage			0.1	0.1
Customer Concentration Risk [Member] \| Sales Revenue, Goods, Net [Member]
Sales
Concentration Risk, Percentage			18.50%	99.90%
Customer Concentration Risk [Member] \| Sale Of Purchased Inventory [Member]
Sales
Concentration Risk, Percentage			81.40%	0.00%
Customer Concentration Risk [Member] \| Company A [Member] \| Sales Revenue, Goods, Net [Member]
Sales
Concentration Risk, Percentage			11.80%	0.00%
Customer Concentration Risk [Member] \| Company A [Member] \| Sale Of Purchased Inventory [Member]
Sales
Concentration Risk, Percentage			23.80%	0.00%
Customer Concentration Risk [Member] \| Company B [Member]
Sales
Concentration Risk, Percentage			6.70%	0.00%
Customer Concentration Risk [Member] \| Company B [Member] \| Sale Of Purchased Inventory [Member]
Sales
Concentration Risk, Percentage			57.60%	0.00%
Customer Concentration Risk [Member] \| Company C [Member]
Sales
Concentration Risk, Percentage			0.00%	67.40%
Customer Concentration Risk [Member] \| Company D [Member] \| Sales Revenue, Goods, Net [Member]
Sales
Concentration Risk, Percentage			0.00%	32.40%
Customer Concentration Risk [Member] \| Company A, B, C, D [Member]
Sales
Concentration Risk, Percentage			99.90%	99.90%