Restricted Cash (Details) (USD $)
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Mar. 31, 2015
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Dec. 31, 2014
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Restricted Cash and Cash Equivalents Items [Line Items] | ||
Non-current restricted cash | $ 7,556,000us-gaap_RestrictedCashAndCashEquivalentsNoncurrent | $ 7,556,000us-gaap_RestrictedCashAndCashEquivalentsNoncurrent |
Surety Bond [Member] | ||
Restricted Cash and Cash Equivalents Items [Line Items] | ||
Reclamation bonding requirement |
26,700,000urg_ReclamationBondingRequirement / us-gaap_LossContingenciesByNatureOfContingencyAxis = us-gaap_SuretyBondMember |
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Money Market Funds [Member] | ||
Restricted Cash and Cash Equivalents Items [Line Items] | ||
Non-current restricted cash |
7,456,000us-gaap_RestrictedCashAndCashEquivalentsNoncurrent / us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis = us-gaap_MoneyMarketFundsMember |
7,456,000us-gaap_RestrictedCashAndCashEquivalentsNoncurrent / us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis = us-gaap_MoneyMarketFundsMember |
Money Market Funds [Member] | Surety Bond [Member] | ||
Restricted Cash and Cash Equivalents Items [Line Items] | ||
Restricted cash pledged as collateral |
7,456,000us-gaap_PledgedAssetsSeparatelyReportedSecuritiesPledgedAsCollateralAtFairValue / us-gaap_LossContingenciesByNatureOfContingencyAxis = us-gaap_SuretyBondMember / us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis = us-gaap_MoneyMarketFundsMember |
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Certificate of deposit [Member] | ||
Restricted Cash and Cash Equivalents Items [Line Items] | ||
Non-current restricted cash |
100,000us-gaap_RestrictedCashAndCashEquivalentsNoncurrent / us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis = us-gaap_CertificatesOfDepositMember |
100,000us-gaap_RestrictedCashAndCashEquivalentsNoncurrent / us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis = us-gaap_CertificatesOfDepositMember |
Certificate of deposit [Member] | Collectibility of Receivables [Member] | ||
Restricted Cash and Cash Equivalents Items [Line Items] | ||
Restricted cash pledged as collateral |
$ 100,000us-gaap_PledgedAssetsSeparatelyReportedSecuritiesPledgedAsCollateralAtFairValue / us-gaap_LossContingenciesByNatureOfContingencyAxis = us-gaap_CollectibilityOfReceivablesMember / us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis = us-gaap_CertificatesOfDepositMember |
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- Definition
Represents the amount of reclamation obligations, which are required to be covered by surety performance bonding, as of the balance sheet date. No definition available.
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- Definition
The sum of the fair values, as of the date of each statement of financial position presented, of securities that are restricted as collateral for the payment of related debt obligations, primarily secured borrowings and repurchase agreements, and that are reclassified and separately reported in the statement of financial position because the transferee has the right by contract or custom to sell or re-pledge them. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Cash and equivalents whose use in whole or in part is restricted for the long-term, generally by contractual agreements or regulatory requirements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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