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Consolidated Statements of Cash Flows (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Operating Activities    
Net loss $ (4,357,345)us-gaap_ProfitLoss $ (4,989,304)us-gaap_ProfitLoss
Adjustments for non-cash items to reconcile net loss to cash used in operating activities:    
Depreciation 9,774us-gaap_DepreciationAndAmortization 51,412us-gaap_DepreciationAndAmortization
Accretion of asset retirement obligation 52,335us-gaap_AccretionExpense 21,831us-gaap_AccretionExpense
Amortization of financing costs 20,228us-gaap_AmortizationOfFinancingCosts 20,228us-gaap_AmortizationOfFinancingCosts
Asset retirement cost 168,145us-gaap_AssetRetirementObligationPeriodIncreaseDecrease 0us-gaap_AssetRetirementObligationPeriodIncreaseDecrease
Other expense (income) 0us-gaap_OtherNonoperatingIncomeExpense (18,323)us-gaap_OtherNonoperatingIncomeExpense
Stock-based compensation 946,410us-gaap_AllocatedShareBasedCompensationExpense 337,671us-gaap_AllocatedShareBasedCompensationExpense
Changes in operating assets and liabilities:    
Accounts receivable 2,706,673us-gaap_IncreaseDecreaseInAccountsReceivable 0us-gaap_IncreaseDecreaseInAccountsReceivable
Prepaid expenses and deposits 306,899us-gaap_IncreaseDecreaseInPrepaidExpense 224,453us-gaap_IncreaseDecreaseInPrepaidExpense
Inventory (316,312)us-gaap_IncreaseDecreaseInInventories 0us-gaap_IncreaseDecreaseInInventories
Other current assets (21,842)us-gaap_IncreaseDecreaseInOtherOperatingAssets 15,342us-gaap_IncreaseDecreaseInOtherOperatingAssets
Accounts payable and accrued liabilities (74,010)us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities (1,109,406)us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities
Due to related parties 3,920us-gaap_IncreaseDecreaseInDueToRelatedParties 14,525us-gaap_IncreaseDecreaseInDueToRelatedParties
Net Cash Used in Operating Activities (555,125)us-gaap_NetCashProvidedByUsedInOperatingActivities (5,431,571)us-gaap_NetCashProvidedByUsedInOperatingActivities
Investing Activities    
Purchase of property and equipment (104,230)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment (132,198)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Net Cash Used in Investing Activities (104,230)us-gaap_NetCashProvidedByUsedInInvestingActivities (132,198)us-gaap_NetCashProvidedByUsedInInvestingActivities
Financing Activities    
Repayment of notes payable (713,866)us-gaap_RepaymentsOfNotesPayable 0us-gaap_RepaymentsOfNotesPayable
Contributions from non-controlling interest 111,868us-gaap_ProceedsFromMinorityShareholders 70,947us-gaap_ProceedsFromMinorityShareholders
Proceeds from issuance of common stock 19,775us-gaap_ProceedsFromIssuanceOfCommonStock 392,731us-gaap_ProceedsFromIssuanceOfCommonStock
Share issuance costs (4,167)us-gaap_PaymentsOfStockIssuanceCosts 0us-gaap_PaymentsOfStockIssuanceCosts
Net Cash Provided by (used in) Financing Activities (586,390)us-gaap_NetCashProvidedByUsedInFinancingActivities 463,678us-gaap_NetCashProvidedByUsedInFinancingActivities
Decrease In Cash (1,245,745)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease (5,100,091)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash - Beginning of Period 6,017,594us-gaap_Cash 11,915,676us-gaap_Cash
Cash - End of Period 4,771,849us-gaap_Cash 6,815,585us-gaap_Cash
Non-cash Investing and Financing Activities    
Stock options issued for mineral property expenditures 61,117urz_StockOptionsIssuedForConstructionInProgress 63,518urz_StockOptionsIssuedForConstructionInProgress
Supplemental Disclosures    
Interest paid 277,384us-gaap_InterestPaid 0us-gaap_InterestPaid
Income taxes paid $ 0us-gaap_IncomeTaxesPaid $ 0us-gaap_IncomeTaxesPaid