|
Notes Payable - Maturities (Details) (USD $)
In Thousands, unless otherwise specified
|
3 Months Ended |
|
Mar. 31, 2015
|
| Payments On Outstanding Debt [Line Items] |
|
| Total |
$ 45,815us-gaap_DebtInstrumentPeriodicPayment
|
| Sweetwater IDR Bond [Member] |
|
| Payments On Outstanding Debt [Line Items] |
|
| Principal |
31,996us-gaap_DebtInstrumentPeriodicPaymentPrincipal
/ us-gaap_DebtInstrumentAxis
= urg_SweetwaterIdrBondMember
|
| Interest |
6,577us-gaap_DebtInstrumentPeriodicPaymentInterest
/ us-gaap_DebtInstrumentAxis
= urg_SweetwaterIdrBondMember
|
| Debt Instrument, Maturity Date |
Oct. 01, 2021
|
| RMBAH First Loan Facility [Member] |
|
| Payments On Outstanding Debt [Line Items] |
|
| Principal |
6,750us-gaap_DebtInstrumentPeriodicPaymentPrincipal
/ us-gaap_DebtInstrumentAxis
= urg_RmbahFirstLoanFacilityMember
|
| Interest |
492us-gaap_DebtInstrumentPeriodicPaymentInterest
/ us-gaap_DebtInstrumentAxis
= urg_RmbahFirstLoanFacilityMember
|
| Debt Instrument, Maturity Date |
Mar. 31, 2016
|
| Year One [Member] |
|
| Payments On Outstanding Debt [Line Items] |
|
| Total |
7,285us-gaap_DebtInstrumentPeriodicPayment
/ urg_YearAxis
= urg_YearOneMember
|
| Year One [Member] | Sweetwater IDR Bond [Member] |
|
| Payments On Outstanding Debt [Line Items] |
|
| Principal |
3,115us-gaap_DebtInstrumentPeriodicPaymentPrincipal
/ us-gaap_DebtInstrumentAxis
= urg_SweetwaterIdrBondMember
/ urg_YearAxis
= urg_YearOneMember
|
| Interest |
1,335us-gaap_DebtInstrumentPeriodicPaymentInterest
/ us-gaap_DebtInstrumentAxis
= urg_SweetwaterIdrBondMember
/ urg_YearAxis
= urg_YearOneMember
|
| Year One [Member] | RMBAH First Loan Facility [Member] |
|
| Payments On Outstanding Debt [Line Items] |
|
| Principal |
2,438us-gaap_DebtInstrumentPeriodicPaymentPrincipal
/ us-gaap_DebtInstrumentAxis
= urg_RmbahFirstLoanFacilityMember
/ urg_YearAxis
= urg_YearOneMember
|
| Interest |
397us-gaap_DebtInstrumentPeriodicPaymentInterest
/ us-gaap_DebtInstrumentAxis
= urg_RmbahFirstLoanFacilityMember
/ urg_YearAxis
= urg_YearOneMember
|
| Year Two [Member] |
|
| Payments On Outstanding Debt [Line Items] |
|
| Total |
10,342us-gaap_DebtInstrumentPeriodicPayment
/ urg_YearAxis
= urg_YearTwoMember
|
| Year Two [Member] | Sweetwater IDR Bond [Member] |
|
| Payments On Outstanding Debt [Line Items] |
|
| Principal |
4,367us-gaap_DebtInstrumentPeriodicPaymentPrincipal
/ us-gaap_DebtInstrumentAxis
= urg_SweetwaterIdrBondMember
/ urg_YearAxis
= urg_YearTwoMember
|
| Interest |
1,568us-gaap_DebtInstrumentPeriodicPaymentInterest
/ us-gaap_DebtInstrumentAxis
= urg_SweetwaterIdrBondMember
/ urg_YearAxis
= urg_YearTwoMember
|
| Year Two [Member] | RMBAH First Loan Facility [Member] |
|
| Payments On Outstanding Debt [Line Items] |
|
| Principal |
4,312us-gaap_DebtInstrumentPeriodicPaymentPrincipal
/ us-gaap_DebtInstrumentAxis
= urg_RmbahFirstLoanFacilityMember
/ urg_YearAxis
= urg_YearTwoMember
|
| Interest |
95us-gaap_DebtInstrumentPeriodicPaymentInterest
/ us-gaap_DebtInstrumentAxis
= urg_RmbahFirstLoanFacilityMember
/ urg_YearAxis
= urg_YearTwoMember
|
| Year Three [Member] |
|
| Payments On Outstanding Debt [Line Items] |
|
| Total |
5,934us-gaap_DebtInstrumentPeriodicPayment
/ urg_YearAxis
= urg_YearThreeMember
|
| Year Three [Member] | Sweetwater IDR Bond [Member] |
|
| Payments On Outstanding Debt [Line Items] |
|
| Principal |
4,623us-gaap_DebtInstrumentPeriodicPaymentPrincipal
/ us-gaap_DebtInstrumentAxis
= urg_SweetwaterIdrBondMember
/ urg_YearAxis
= urg_YearThreeMember
|
| Interest |
1,311us-gaap_DebtInstrumentPeriodicPaymentInterest
/ us-gaap_DebtInstrumentAxis
= urg_SweetwaterIdrBondMember
/ urg_YearAxis
= urg_YearThreeMember
|
| Year Four [Member] |
|
| Payments On Outstanding Debt [Line Items] |
|
| Total |
5,934us-gaap_DebtInstrumentPeriodicPayment
/ urg_YearAxis
= urg_YearFourMember
|
| Year Four [Member] | Sweetwater IDR Bond [Member] |
|
| Payments On Outstanding Debt [Line Items] |
|
| Principal |
4,895us-gaap_DebtInstrumentPeriodicPaymentPrincipal
/ us-gaap_DebtInstrumentAxis
= urg_SweetwaterIdrBondMember
/ urg_YearAxis
= urg_YearFourMember
|
| Interest |
1,039us-gaap_DebtInstrumentPeriodicPaymentInterest
/ us-gaap_DebtInstrumentAxis
= urg_SweetwaterIdrBondMember
/ urg_YearAxis
= urg_YearFourMember
|
| Year Five [Member] |
|
| Payments On Outstanding Debt [Line Items] |
|
| Total |
5,935us-gaap_DebtInstrumentPeriodicPayment
/ urg_YearAxis
= urg_YearFiveMember
|
| Year Five [Member] | Sweetwater IDR Bond [Member] |
|
| Payments On Outstanding Debt [Line Items] |
|
| Principal |
5,183us-gaap_DebtInstrumentPeriodicPaymentPrincipal
/ us-gaap_DebtInstrumentAxis
= urg_SweetwaterIdrBondMember
/ urg_YearAxis
= urg_YearFiveMember
|
| Interest |
752us-gaap_DebtInstrumentPeriodicPaymentInterest
/ us-gaap_DebtInstrumentAxis
= urg_SweetwaterIdrBondMember
/ urg_YearAxis
= urg_YearFiveMember
|
| Subsequent Years |
|
| Payments On Outstanding Debt [Line Items] |
|
| Total |
10,385us-gaap_DebtInstrumentPeriodicPayment
/ urg_YearAxis
= urg_SubsequenttoyearfiveMember
|
| Subsequent Years | Sweetwater IDR Bond [Member] |
|
| Payments On Outstanding Debt [Line Items] |
|
| Principal |
9,813us-gaap_DebtInstrumentPeriodicPaymentPrincipal
/ us-gaap_DebtInstrumentAxis
= urg_SweetwaterIdrBondMember
/ urg_YearAxis
= urg_SubsequenttoyearfiveMember
|
| Interest |
$ 572us-gaap_DebtInstrumentPeriodicPaymentInterest
/ us-gaap_DebtInstrumentAxis
= urg_SweetwaterIdrBondMember
/ urg_YearAxis
= urg_SubsequenttoyearfiveMember
|