| Document and Entity Information | 9 Months Ended | |
| Feb. 28, 2014 | Apr. 17, 2014 | |
| Document Type | '10-Q | ' |
| Amendment Flag | 'false | ' |
| Document Period End Date | 28-Feb-14 | ' |
| Trading Symbol | 'tgri | ' |
| Entity Registrant Name | 'Tierra Grande Resources Inc. | ' |
| Entity Central Index Key | '0001376804 | ' |
| Current Fiscal Year End Date | '--05-31 | ' |
| Entity Filer Category | 'Smaller Reporting Company | ' |
| Entity Common Stock, Shares Outstanding | ' | 95,769,712 |
| Entity Current Reporting Status | 'Yes | ' |
| Entity Voluntary Filers | 'No | ' |
| Entity Well Known Seasoned Issuer | 'No | ' |
| Document Fiscal Year Focus | '2014 | ' |
| Document Fiscal Period Focus | 'Q3 | ' |
| Consolidated Balance Sheets (USD $) | Feb. 28, 2014 | 31-May-13 |
| Current Assets | ' | ' |
| Cash | $61,241 | $39,983 |
| Total Current Assets | 61,241 | 39,983 |
| Property and Equipment, net accumulated depreciation of $4,330 and $3,585, respectively | 906 | 1,651 |
| Website Development Costs, net accumulated amortization of $0 | 0 | 5,500 |
| Total Assets | 62,147 | 47,134 |
| Current Liabilities | ' | ' |
| Accounts payable | 11,605 | 3,583 |
| Total Liabilities | 11,605 | 3,583 |
| Stockholders' Equity | ' | ' |
| Preferred Stock, 20,000,000 shares authorized, $0.0001 par value, None issued and outstanding | 0 | 0 |
| Common Stock, 500,000,000 shares authorized, $0.0001 par value 95,769,712 shares and 78,269,712 shares issued and outstanding, respectively | 9,577 | 7,877 |
| Additional Paid-in Capital | 9,220,528 | 9,052,228 |
| Deficit Accumulated During the Exploration Stage | -9,179,563 | -9,016,554 |
| Total Stockholders' Equity | 50,542 | 43,551 |
| Total Liabilities and Stockholders' Equity | $62,147 | $47,134 |
| Consolidated Balance Sheets [Parenthetical] (USD $) | Feb. 28, 2014 | 31-May-13 |
| Property and Equipment, net accumulated depreciation (in dollars) | $4,330 | $3,585 |
| Website Development Costs, net amortization | $0 | $0 |
| Preferred Stock, shares authorized | 20,000,000 | 20,000,000 |
| Preferred Stock, par value (in dollars per share) | $0.00 | $0.00 |
| Preferred Stock, shares issued | 0 | 0 |
| Preferred Stock, shares outstanding | 0 | 0 |
| Common Stock, shares authorized | 500,000,000 | 500,000,000 |
| Common Stock, par value (in dollars per share) | $0.00 | $0.00 |
| Common Stock, shares issued | 95,769,712 | 78,269,712 |
| Common Stock, shares outstanding | 95,769,712 | 78,269,712 |
| Consolidated Statements of Expenses (USD $) | 3 Months Ended | 9 Months Ended | 95 Months Ended | ||
| Feb. 28, 2014 | Feb. 28, 2013 | Feb. 28, 2014 | Feb. 28, 2013 | Feb. 28, 2014 | |
| Expenses | ' | ' | ' | ' | ' |
| General and administrative | $5,194 | $32,466 | $36,643 | $234,763 | $3,046,109 |
| Exploration mineral property costs | 0 | 3,805 | 65,009 | 10,911 | 252,140 |
| Professional fees | 32,005 | 3,965 | 55,857 | 35,119 | 765,361 |
| Total Expenses | 37,199 | 40,236 | 157,509 | 280,793 | 4,063,610 |
| Net Loss Before Other Expenses | -37,199 | -40,236 | -157,509 | -280,793 | -4,063,610 |
| Other Income (Expenses) | ' | ' | ' | ' | ' |
| Interest income | 0 | 0 | 0 | 0 | 2,276 |
| Miscellaneous income | 0 | 0 | 0 | 0 | 1,467 |
| Interest expense | 0 | 0 | 0 | 0 | -59,588 |
| Accretion of convertible debenture discount | 0 | 0 | 0 | 0 | -31,396 |
| Gain on disposal of property and equipment | 0 | 0 | 0 | 0 | 7,277 |
| Impairment of website development costs | -5,500 | 0 | -5,500 | 0 | -5,500 |
| Total Other Income (Expenses) | -5,500 | 0 | -5,500 | 0 | -85,464 |
| Net Loss From Continuing Operations | -42,699 | -40,236 | -163,009 | -280,793 | -4,149,074 |
| Results from discontinued operations | 0 | 0 | 0 | 0 | -5,030,489 |
| Net Loss | ($42,699) | ($40,236) | ($163,009) | ($280,793) | ($9,179,563) |
| Net Loss Per Share - Basic and Diluted | $0 | $0 | $0 | $0 | ' |
| Weighted Average Shares Outstanding | 92,936,000 | 78,770,000 | 86,707,000 | 78,266,000 | ' |
| Consolidated Statements of Cash Flows (USD $) | 9 Months Ended | 95 Months Ended | |
| Feb. 28, 2014 | Feb. 28, 2013 | Feb. 28, 2014 | |
| Operating Activities | ' | ' | ' |
| Net loss | ($163,009) | ($280,793) | ($9,179,563) |
| Adjustments to reconcile net loss to net cash used in operating activities | ' | ' | ' |
| Accretion of convertible debenture discount | 0 | 0 | 31,396 |
| Depreciation and amortization | 745 | 1,256 | 4,330 |
| Shares issued for mineral property costs | 0 | 0 | 2,323,600 |
| Impairment of mineral property costs | 0 | 0 | 2,230,125 |
| Impairment of website development costs | 5,500 | 0 | 5,500 |
| Stock-based compensation | 0 | 45,833 | 718,953 |
| Gain on disposal of property and equipment | 0 | 0 | -7,277 |
| Loss from discontinued operations | 0 | 0 | 37,785 |
| Bad debt expense | 0 | 0 | 63,344 |
| Changes in operating assets and liabilities | ' | ' | ' |
| Accounts payable and accrued liabilities | 8,022 | -98,256 | 587,906 |
| Advances | 0 | -54,592 | 0 |
| Other receivables | 0 | 451 | -2,288 |
| Prepaid expenses and other current assets | 0 | 0 | -11,043 |
| Due to related parties | 0 | -828 | -202,229 |
| Net Cash Used in Operating Activities | -148,742 | -386,929 | -3,399,461 |
| Investing Activities | ' | ' | ' |
| Acquisition of mineral properties | 0 | 0 | -2,230,125 |
| Acquisition of property and equipment | 0 | -1,273 | -89,969 |
| Proceeds from disposition of subsidiaries | 0 | 0 | 32,970 |
| Proceeds from disposal of property and equipment | 0 | 0 | 24,777 |
| Proceeds from disposal of property and equipment in discontinued operations | 0 | 0 | 12,496 |
| Website development costs | 0 | -5,500 | -5,500 |
| Net Cash Used in Investing Activities | 0 | -6,773 | -2,255,351 |
| Financing Activities | ' | ' | ' |
| Advances from related parties | 0 | 0 | 196,671 |
| Repayments to related parties | 0 | 0 | -59,026 |
| Advances to related party receivable | 0 | 0 | -63,344 |
| Proceeds from related party receivable | 0 | 0 | 10,000 |
| Proceeds from notes payable | 0 | 0 | 61,694 |
| Repayment of note payable | 0 | 0 | -73,362 |
| Proceeds from loans payable | 0 | 0 | 387,218 |
| Repayment of loans payable | 0 | 0 | -25,000 |
| Proceeds from the issuance of common stock | 170,000 | 0 | 5,448,352 |
| Proceeds from common stock subscription | 0 | 30,000 | 40,350 |
| Share issuance costs | 0 | 0 | -207,500 |
| Net Cash Provided by Financing Activities | 170,000 | 30,000 | 5,716,053 |
| Increase (Decrease) In Cash | 21,258 | -363,702 | 61,241 |
| Cash - Beginning of Period | 39,983 | 446,623 | 0 |
| Cash - End of Period | 61,241 | 82,921 | 61,241 |
| Non-Cash Investing and Financing Activities: | ' | ' | ' |
| Convertible debt issued to settle loans payable | 0 | 0 | 350,000 |
| Convertible debt issued to settle related party advances | 0 | 0 | 150,000 |
| Common stock issued for mineral property acquisitions | 0 | 0 | 2,201,100 |
| Common stock issued for finders fee | 0 | 0 | 100,000 |
| Common stock issued for prior period accrued services | 0 | 240,625 | 412,625 |
| Disposal of property and equipment for debt settlement | 0 | 0 | 16,952 |
| Conversion of debt to stock | 0 | 0 | 66,332 |
| Issuance of stock for settlement of accrued interest | 0 | 0 | 477,661 |
| Supplemental Disclosures: | ' | ' | ' |
| Interest paid | 0 | 0 | 21,897 |
| Income tax paid | $0 | $0 | $0 |
| Nature of Operations and Continuance of Business | 9 Months Ended | |
| Feb. 28, 2014 | ||
| Nature of Operations and Continuance of Business [Text Block] | ' | |
| 1 | Nature of Operations and Continuance of Business | |
| The Company was incorporated in the State of Nevada on April 4, 2006. The Company is an Exploration Stage Company, as defined by Statement of Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 915, Development Stage Entities. The Company’s principal business is the acquisition and exploration of mineral properties. Effective April 10, 2013, the Company changed its name from Buckingham Exploration Inc. to Tierra Grande Resources Inc. On August 9, 2010, the Company incorporated 0887717 B.C. Ltd., a wholly-owned subsidiary in British Columbia, Canada. On February 28, 2013, the Company acquired a 100% interest in Tierra Grande Resources, S.A.C. (“Tierra”), a company incorporated in Peru, in consideration for $10. | ||
| Going Concern | 9 Months Ended | |
| Feb. 28, 2014 | ||
| Going Concern [Text Block] | ' | |
| 2 | Going Concern | |
| These consolidated financial statements have been prepared on a going concern basis, which implies the Company will continue to realize its assets and discharge its liabilities in the normal course of business. The Company has not generated revenues since inception and has not paid any dividends and is unlikely to pay dividends or generate earnings in the immediate or foreseeable future. The continuation of the Company as a going concern is dependent upon the continued financial support from its shareholders, the ability of the Company to obtain necessary equity financing to continue operations, and the attainment of profitable operations. As at February 28, 2014, the Company has working capital of $49,636 and an accumulated deficit of $9,179,563. These factors raise substantial doubt regarding the Company’s ability to continue as a going concern. These consolidated financial statements do not include any adjustments to the recoverability and classification of recorded asset amounts and classification of liabilities that might be necessary should the Company be unable to continue as a going concern. | ||
| As at February 28, 2014, the Company had $61,241 cash in the bank. The Company requires a minimum of $200,000 to proceed with their plan of operations over the next twelve months. If they achieve less than the full amount of financing that they require they will scale back planned exploration activities and day to day operations in order to reduce exploration expenses and general and administrative expenses to a level appropriate to the financial resources available. There can be no assurance that the Company will be able to raise sufficient funds to pay the expected operating expenses for the next twelve months. | ||
| Interim Financial Statements | 9 Months Ended | |
| Feb. 28, 2014 | ||
| Interim Financial Statements [Text Block] | ' | |
| 3 | Interim Financial Statements | |
| The unaudited interim consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States for interim financial information and with the instructions to Securities and Exchange Commission (“SEC”) Form 10-Q. They do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. Therefore, these unaudited interim consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements and notes thereto for the year ended May 31, 2013, included in the Company’s Annual Report on Form 10-K filed on September 16, 2013 with the SEC. | ||
| The financial statements included herein are unaudited; however, they contain all normal recurring accruals and adjustments that, in the opinion of management, are necessary to present fairly the Company’s financial position at February 28, 2014, and the results of its operations and cash flows for the three and nine months ended February 28, 2014 and 2013. The results of operations for the three and nine months ended February 28, 2014, are not necessarily indicative of the results to be expected for future quarters or the full year. | ||
| The accompanying unaudited interim consolidated financial statements include the accounts of Tierra Grande Resources Inc. and its wholly owned subsidiaries 0887717 B.C. Ltd. and Tierra Grande Resources, S.A.C. All significant intercompany balances and transactions have been eliminated in the consolidation. | ||
| Common Stock | 9 Months Ended | ||
| Feb. 28, 2014 | |||
| Common Stock [Text Block] | ' | ||
| 4 | Common Stock | ||
| a) | During the nine months ended February 28, 2014, the Company issued 14,000,000 shares of common stock at $0.01 per share for proceeds of $140,000 under a private placement. | ||
| b) | During the nine months ended February 28, 2014, the Company issued 3,000,000 shares of common stock at $0.01 per share for proceeds of $30,000. The shares have not been issued yet. | ||
| Nature of Operations and Continuance of Business (Narrative) (Details) (USD $) | 9 Months Ended |
| Feb. 28, 2014 | |
| Nature Of Operations And Continuance Of Business 1 | 100.00% |
| Nature Of Operations And Continuance Of Business 2 | $10 |
| Going Concern (Narrative) (Details) (USD $) | 9 Months Ended |
| Feb. 28, 2014 | |
| Going Concern 1 | $49,636 |
| Going Concern 2 | 9,179,563 |
| Going Concern 3 | 61,241 |
| Going Concern 4 | $200,000 |
| Common Stock (Narrative) (Details) (USD $) | 9 Months Ended |
| Feb. 28, 2014 | |
| Common Stock 1 | 14,000,000 |
| Common Stock 2 | $0.01 |
| Common Stock 3 | $140,000 |
| Common Stock 4 | 3,000,000 |
| Common Stock 5 | $0.01 |
| Common Stock 6 | $30,000 |
