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Other Liabilities (Details) (USD $)
In Thousands, except Share data, unless otherwise specified |
3 Months Ended | ||
|---|---|---|---|
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Mar. 31, 2015
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Mar. 31, 2014
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Dec. 31, 2013
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| Option Indexed to Issuers Equity [Line Items] | |||
| Warrants Price Per Share On Nonhedging Derivative Financial Instrument | $ 1.35urg_WarrantsPricePerShareOnNonhedgingDerivativeFinancialInstrument | ||
| Warrants mark to market gain | $ 77us-gaap_FairValueAdjustmentOfWarrants | $ 263us-gaap_FairValueAdjustmentOfWarrants | |
| Capital Stock | |||
| Option Indexed to Issuers Equity [Line Items] | |||
| Number of securities called by each unit |
1us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
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| Warrants | |||
| Option Indexed to Issuers Equity [Line Items] | |||
| Number of securities called by each unit |
0.5us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |
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| X | ||||||||||
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- Definition
Warrants Price Per Share On Nonhedging Derivative Financial Instrument No definition available.
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| X | ||||||||||
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- Definition
Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares. No definition available.
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| X | ||||||||||
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- Definition
Amount of expense (income) related to adjustment to fair value of warrant liability. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Details
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- Details
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