Accounts receivable Accumulated Other Comprehensive Income Additional Paid-in Capital Current portion of asset retirement obligation (note 8) ASSET RETIREMENT OBLIGATION Asset Retirement Obligation Disclosure [Text Block] Asset retirement expenditures Asset Retirement Obligation (note 8) Asset retirement obligation expensed Asset Retirement Obligation, Revision of Estimate Consolidated Balance Sheets (Unaudited) (Under Creditor Protection Proceedings as of November 29, 2011 - note 1) [Abstract] Cash and cash equivalents Cash and cash equivalents, Beginning of Period Cash and cash equivalents, End of Period Accounts payable and accrued liabilities Accounts receivable and prepaid expenses Increase (Decrease) in Operating Assets Changes in Non-Cash Working Capital CONTINGENCIES AND COMMITMENTS Commitments and Contingencies Disclosure [Text Block] Common Stock, shares authorized (in shares) Common Stock, shares outstanding (in shares) Common Stock, par value of $0.001 each, 750,000,000 shares authorized, 348,698,837 and 348,495,556 shares outstanding at January 31, 2012 and April 30, 2011 respectively (note 11) Total Current Liabilities Liabilities, Current Current Liabilities: Deferred income tax benefit Deferred Income Tax Expense (Benefit) Depreciation and accretion Effects of exchange rate changes on cash and cash equivalents Stock-based compensation (notes 9 and 12) Stock-based compensation Exploration Corporate General and administrative Impairment of property and equipment (note 6) Consolidated Statements of Operations (Unaudited) (Under Creditor Protection Proceedings as of November 29, 2011 - note 1) [Abstract] Restricted cash Increase (Decrease) in Restricted Cash Total Liabilities and Stockholders' Equity Liabilities and Equity LIABILITIES AND STOCKHOLDERS' EQUITY LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities subject to compromise (note 7) LIABILITIES SUBJECT TO COMPROMISE [Abstract] Shares issued to non-controlling interest Cash Provided by Financing Activities Net Cash Provided by (Used in) Financing Activities Financing Activities Cash Used in Investing Activities Net Cash Provided by (Used in) Investing Activities Investing Activities Cash Used in Operating Activities Net Cash Provided by (Used in) Operating Activities Operating Activities Net loss attributable to common stockholders Net Income (Loss) Attributable to Parent Inflow (Outflow) of cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Impairment of property and equipment Other comprehensive income (loss): Other investments Payments for (Proceeds from) Other Investing Activities Preferred Stock, shares authorized (in shares) Preferred Stock, shares outstanding (in shares) Preferred Stock, par value (in dollars per share) Prepaid expenses Convertible debentures Issuance of shares for cash, net of issue costs Shares issued by subsidiary to non-controlling interest Proceeds on sale of equipment Property and Equipment (notes 5 and 6) PROPERTY AND EQUIPMENT [Abstract] Property and equipment expenditures Payments to Acquire Property, Plant, and Equipment Reorganization expenses (note 13) REORGANIZATION EXPENSES [Abstract] Restricted cash (note 4) Deficit Accumulated During Development Stage Consolidated Statements of Cash Flows (Unaudited) (Under Creditor Protection Proceedings as of November 29, 2011 - note 1) [Abstract] Consolidated Statements of Comprehensive Loss (Unaudited) (Under Creditor Protection Proceedings as of November 29, 2011 - note 1) [Abstract] Consolidated Statements of Stockholders' Equity (Unaudited) (Under Creditor Protection Proceedings as of November 29, 2011 - note 1) [Abstract] Stockholders' Equity: Stockholders' Equity: Supplemental disclosures of cash flow information: Total Current Assets Assets, Current Current Assets: Common Stock [Member] PROPERTY AND EQUIPMENT Property, Plant and Equipment Disclosure [Text Block] Preferred Stock [Member] Total Assets Assets Interest income Investment Income, Interest Obligation under sublease contract Statement [Table] ASSETS Statement [Line Items] Expenses Total Expenses Operating Expenses Common Stock, par value (in dollars per share) Foreign exchange gain (loss) on translation Foreign exchange loss (gain) on translation Total Stockholders' Equity Stockholders' Equity Attributable to Parent Foreign exchange (gain) loss Foreign Currency Transaction Gain (Loss), before Tax Preferred Stock, par value of $0.001 each, 10,000,000 shares authorized, 1 Series B Preferred share outstanding (notes 10 and 11) Capital Stock Capital Stock Shares purchased from non-controlling interest Statement, Equity Components [Axis] Additional Paid-in Capital [Member] Additional Paid in Capital [Member] Retained Earnings [Member] Deficit Accumulated During the Development Stage [Member] Accumulated Other Comprehensive Income (Loss) [Member] Accumulated Other Comprehensive Income (Loss) [Member] Equity Component [Domain] Cash Stock Issued During Period, Value, New Issues Stock based compensation Stock option exercises Cash (in shares) Stock based compensation (in shares) Stock option exercises (in shares) Share issue costs Non-Cash Financing Activities Net loss Net loss Net loss attributable to non-controlling interest Comprehensive Loss Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive loss attributable to non-controlling interest Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Balance Balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Noncontrolling Interest [Member] Non-Controlling Interest [Member] Non-controlling interest: Contingencies and commitments (note 14) Non-cash adjustments to net loss DESCRIPTION OF BUSINESS AND NATURE OF OPERATIONS Nature of Operations [Text Block] Accounts payable Accrued liabilities Comprehensive loss attributable to common stockholders Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Stock-based compensation cost Loss before deferred income taxes Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Premium on flow-through shares Adjustments to Additional Paid in Capital, Other Increase in interest arising from share issuance by OQI Sask Net lease expenditures BASIS OF PRESENTATION Business Description and Basis of Presentation [Text Block] Balance (in shares) Balance (in shares) Shares, Outstanding RESTRICTED CASH Restricted Assets Disclosure [Text Block] Property Property (in shares) CONTINGENCIES AND COMMITMENTS [Abstract] Preferred shares issued on reorganization (note 10) Preferred shares issued on reorganization (note 10) (in shares) ASSET RETIREMENT OBLIGATION [Abstract] SUBSEQUENT EVENTS Subsequent Events [Text Block] IMPAIRMENT OF PROPERTY AND EQUIPMENT Asset Impairment Charges [Text Block] BASIS OF PRESENTATION [Abstract] SUBSEQUENT EVENTS [Abstract] Other non-cash items Other Noncash Income (Expense) Net loss attributable to common stockholders per share - Basic and Diluted (in dollars per share) Earnings Per Share, Basic and Diluted Amendment Flag Current Fiscal Year End Date Document Period End Date Entity [Text Block] Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Filer Category Entity Registrant Name Entity Central Index Key Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Period Focus Document Type Other Items [Abstract] Other Items Weighted Average Number Of Shares Outstanding Basic And Diluted Duration The average number of shares or units issued and outstanding that are used in calculating basic and diluted EPS. Weighted average number of common stock outstanding (in shares) Warrants Issued For Properties The value of warrants issued for properties in a noncash (or part noncash) transaction. Warrants issued for properties Proceeds From Exercise Of Subsidiary Options Proceeds from exercise of OQI Sask stock options. Proceeds from exercise of OQI Sask Options Shares issued on exercise of subsidiary options and warrants Common Stock Issued During Period For Purchase Of Assets Value of shares of stock issued during the period as part of a transaction to acquire assets that do not qualify as a business combination. Common stock issued for properties Common Stock Issued Value During Period Services Value of shares of stock issued during the period for services. Common stock issued for services Common Stock Issued During Period Debt Settlement Value of shares of stock issued during the period for settlement of debt. Common stock issued for debt settlement COMPANIES' CREDITORS ARRANGEMENT ACT (CANADA) PROCEEDINGS AND GOING CONCERN [Abstract] Companies' Creditors Arrangement Act( Canada) Proceedings And Going Concern Disclosure [Text Block] The entire disclosure for an entity that is under Companies' Creditors Arrangement Act (Canada) proceedings and an entity's going concern if there is a substantial doubt about an entity's ability to continue as a going concern for a reasonable period of time (generally a year from the balance sheet date). COMPANIES' CREDITORS ARRANGEMENT ACT (CANADA) PROCEEDINGS AND GOING CONCERN DESCRIPTION OF BUSINESS AND NATURE OF OPERATIONS [Abstract] RESTRICTED CASH [Abstract] IMPAIRMENT OF PROPERTY AND EQUIPMENT [Abstract] Oqi Sask Stock Options [Text Block] The entire disclosure for OQI Sask Stock Options. OQI SASK STOCK OPTIONS OQI Sask Stock Options [Abstract] OQI SASK STOCK OPTIONS [Abstract] OQI SASK EXCHANGEABLE SHARES AND PREFERRED STOCK [Text Block] The entire disclosure for exchangeable shares and preferred stock of OQI Sask, a company in which the reporting entity holds a non-controlling interest. OQI SASK EXCHANGEABLE SHARES AND PREFERRED STOCK OQI SASK EXCHANGEABLE SHARES AND PREFERRED STOCK [Abstract] COMMON STOCK [Text Block] The entire disclosure for the reporting entity's common stock. COMMON STOCK COMMON STOCK [Abstract] STOCK OPTIONS [Text Block] The entire disclosure for the reporting entity's stock options. STOCK OPTIONS STOCK OPTIONS [Abstract] Income Loss From Continuing Operations Before Reorganization Expenses Income Taxes Extraordinary Items Noncontrolling Interest This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before reorganization items, income taxes, extraordinary items, and non-controlling interest. Loss before reorganization expenses and deferred income tax Cash Paid For Reorganization Expenses Total cash paid for reorganization expenses. Cash paid for reorganization expenses (note 13) Changes In Noncash Working Capital Related To Reorganization Expenses Total changes in non-cash working capital related to reorganization expenses. Changes in non-cash working capital related to reorganization expenses (note 13) LIABILITIES SUBJECT TO COMPROMISE [Text Block] The entire disclosure of items included in liabilities subject to compromise. May include assumptions used to determine amounts subject to compromise and factors or events that might impact those assumptions. LIABILITIES SUBJECT TO COMPROMISE Reorganization Items [Text Block] The entire disclosure of items included in reorganization expenses. REORGANIZATION EXPENSES Adjustments To Additional Paid In Capital Convertible Debt Conversion Feature Adjustment to Additional Paid in Capital resulting from the conversion of convertible debt instruments. A beneficial conversion feature is a nondetachable conversion feature that is in-the-money. Beneficial conversion feature of Convertible debenture and warrants Proceeds Exercise Of Subsidiary Options And Warrants Proceeds from exercise of OQI Sask stock options and warrants. Proceeds from exercise of OQI Sask options and warrants Exchange Of Subsidiary Exchangeable Shares Number of shares of Exchangeable Shares during the period exchanged into shares of OQI common stock. Exchange of OQI Sask Exchangeable shares (in shares) Exchange Of Subsidiary Exchangeable Shares Value Value of shares of Exchangeable Shares during the period exchanged into shares of OQI common stock. Exchange of OQI Sask Exchangeable shares Stock Issued During Period Settlement Of Debt Shares Number of shares of stock issued during the period for settlement of debt. Settlement of debt (in shares) Stock Issued During Period Settlement Of Debt Value of shares of stock issued during the period for settlement of debt. Settlement of debt Stock Issued During Period Services Shares Number of shares of stock issued during the period for services. Services (in shares) Stock Issued During Period Services Value of shares of stock issued during the period for services. Services Stock Issued During Period Shares Cashless Exercise Of Warrants And Options Number of shares issued during the period from a cashless exercise of warrants and options. Cashless exercise of warrants and options (in shares) Stock Issued During Period Value Cashless Exercise Of Warrants And Options Value of shares issued during the period from a cashless exercise of warrants and options. Cashless exercise of warrants and options Stock Issued Through Subscription Shares Number of shares of stock issued during the period through subscription. Subscription (in shares) Stock Issued Through Subscription Value Value of stock issued during the period through subscription. Subscription Common Stock Issued For [Abstract] Common stock issued for: Common Stock Shares Issued At Inception The number of common stock shares issued at inception on April 3, 1998 in exchange for assets. Common stock issued at inception on April 3, 1998 for assets (in shares) Common Stock Value Issued At Inception The value of common stock issued at inception on April 3, 1998 in exchange for assets. Common stock issued at inception on April 3, 1998 for assets Companies' Creditor Arrangement Act (Canada) proceedings and going concern Companies' Creditor Arrangement Act proceedings and going concern Companies' Creditor Arrangement Act (Canada) proceedings and going concern (note 1) Subsequent events Subsequent events Subsequent events (notes 1, 5, 6, 14 and 15)