|
Shareholders' Equity and Capital Stock - o/s warrants (Details) (USD $)
|
12 Months Ended |
|
|
|
|
|
Dec. 31, 2014
|
Dec. 31, 2013
|
Dec. 19, 2013
|
Dec. 31, 2012
|
Dec. 31, 2011
|
| Class of Warrant or Right |
|
|
|
|
|
| Exercise price |
$ 1.19us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
|
$ 1.19us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
|
$ 1.35us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
|
$ 1.06us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
|
$ 1.12us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
|
| Number of warrants |
8,374,112us-gaap_ClassOfWarrantOrRightOutstanding
|
8,374,112us-gaap_ClassOfWarrantOrRightOutstanding
|
|
150,000us-gaap_ClassOfWarrantOrRightOutstanding
|
100,000us-gaap_ClassOfWarrantOrRightOutstanding
|
| Remaining contractual life (years) |
3 years
|
|
|
|
|
| Warrants Exercise Price Range One [Member] |
|
|
|
|
|
| Class of Warrant or Right |
|
|
|
|
|
| Exercise price |
$ 0.92us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ urg_WarrantsExercisePriceRangeAxis
= urg_WarrantsExercisePriceRangeOneMember
|
|
|
|
|
| Number of warrants |
50,000us-gaap_ClassOfWarrantOrRightOutstanding
/ urg_WarrantsExercisePriceRangeAxis
= urg_WarrantsExercisePriceRangeOneMember
|
|
|
|
|
| Remaining contractual life (years) |
8 months 12 days
|
|
|
|
|
| Expiry |
Sep. 04, 2015
|
|
|
|
|
| Warrants Exercise Price Range Two [Member] |
|
|
|
|
|
| Class of Warrant or Right |
|
|
|
|
|
| Exercise price |
$ 1.12us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ urg_WarrantsExercisePriceRangeAxis
= urg_WarrantsExercisePriceRangeTwoMember
|
|
|
|
|
| Number of warrants |
100,000us-gaap_ClassOfWarrantOrRightOutstanding
/ urg_WarrantsExercisePriceRangeAxis
= urg_WarrantsExercisePriceRangeTwoMember
|
|
|
|
|
| Remaining contractual life (years) |
9 months 18 days
|
|
|
|
|
| Expiry |
Nov. 01, 2015
|
|
|
|
|
| Warrants Exercise Price Range Three [Member] |
|
|
|
|
|
| Class of Warrant or Right |
|
|
|
|
|
| Exercise price |
$ 0.93us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ urg_WarrantsExercisePriceRangeAxis
= urg_WarrantsExercisePriceRangeThreeMember
|
|
|
|
|
| Number of warrants |
25,000us-gaap_ClassOfWarrantOrRightOutstanding
/ urg_WarrantsExercisePriceRangeAxis
= urg_WarrantsExercisePriceRangeThreeMember
|
|
|
|
|
| Remaining contractual life (years) |
1 year 2 months 12 days
|
|
|
|
|
| Expiry |
Mar. 05, 2016
|
|
|
|
|
| Warrants Exercise Price Range Four [Member] |
|
|
|
|
|
| Class of Warrant or Right |
|
|
|
|
|
| Exercise price |
$ 1.35us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ urg_WarrantsExercisePriceRangeAxis
= urg_WarrantsExercisePriceRangeFourMember
|
|
|
|
|
| Number of warrants |
2,354,545us-gaap_ClassOfWarrantOrRightOutstanding
/ urg_WarrantsExercisePriceRangeAxis
= urg_WarrantsExercisePriceRangeFourMember
|
|
|
|
|
| Remaining contractual life (years) |
2 years
|
|
|
|
|
| Expiry |
Dec. 19, 2016
|
|
|
|
|
| Warrants Exercise Price Range Five [Member] |
|
|
|
|
|
| Class of Warrant or Right |
|
|
|
|
|
| Exercise price |
$ 1.12us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ urg_WarrantsExercisePriceRangeAxis
= urg_WarrantsExercisePriceRangeFiveMember
|
|
|
|
|
| Number of warrants |
4,294,167us-gaap_ClassOfWarrantOrRightOutstanding
/ urg_WarrantsExercisePriceRangeAxis
= urg_WarrantsExercisePriceRangeFiveMember
|
|
|
|
|
| Remaining contractual life (years) |
3 years 6 months
|
|
|
|
|
| Expiry |
Jun. 24, 2018
|
|
|
|
|
| Warrants Exercise Price Range Six [Member] |
|
|
|
|
|
| Class of Warrant or Right |
|
|
|
|
|
| Exercise price |
$ 1.17us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ urg_WarrantsExercisePriceRangeAxis
= urg_WarrantsExercisePriceRangeSixMember
|
|
|
|
|
| Number of warrants |
1,550,400us-gaap_ClassOfWarrantOrRightOutstanding
/ urg_WarrantsExercisePriceRangeAxis
= urg_WarrantsExercisePriceRangeSixMember
|
|
|
|
|
| Remaining contractual life (years) |
3 years 7 months 6 days
|
|
|
|
|
| Expiry |
Aug. 27, 2018
|
|
|
|
|