2.2.0.25falsefalse1220 - Disclosure - Concentration of Credit Risktruefalsefalse1falsefalseUSDfalsefalse1/1/2010 - 12/31/2010 USD ($) USD ($) / shares $D2010http://www.sec.gov/CIK0001415020duration2010-01-01T00:00:002010-12-31T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDPerShareDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDUSD$2true0tc_ConcentrationOfCreditRiskDisclosureAbstracttcfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseConcentration of Credit Risk3false0us-gaap_ConcentrationRiskDisclosureTextBlockus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00<table style="font-size:10pt; font-family:'Times New Roman',times,serif;"> <tr> <td> 22. Concentration of Credit Risk         TCM is exposed to counterparty risk from its cash and cash equivalent balances, its short-term cash investments, and its reclamation deposits held by an insurance company and governmental entities. TCM monitors its positions with, and the credit quality of, the financial institutions in which it invests its cash, cash equivalents and short-term investments, and that hold its reclamation deposits. Counterparties to cash balances, money market instruments, government treasury securities and its reclamation deposits are US and Canadian institutions and the US and Canadian governments. TCM's investment policy limits investments to government-backed financial instruments, other than balances maintained in various bank operating accounts.         TCM manages its credit risk from its accounts receivable through established credit monitoring activities. As of December 31, 2010, TCM had three customers which owed TCM more than $3.0 million and accounted for approximately 20% of all receivables outstanding. There were another seventeen customers having balances greater than $1.0 million but less than $3.0 million that accounted for 37% of total receivables. All of these balances were compliant with credit terms and scheduled payment dates.         TCM's maximum credit risk exposure is the carrying value of its accounts receivable. The carrying amounts of accounts receivable, accounts payable, accrued liabilities, and debt approximate fair value as of December 31, 2010 and December 31, 2009.</td></tr></table> 22. Concentration of Credit Risk         TCM is exposed to counterparty risk from its cash and cash equivalentfalsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringDescription of any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. The entity should inform financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date. Disclosure of any financial instrument credit risk concentration also should indicate the maximum amount of loss that would be incurred upon complete failure of the counterparty to perform and the entity's collateral policies or other policies that limit the loss exposure. This element may be used as a single block of text to encapsulate the entire disclosure including data and tables.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 15A Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 94-6 -Paragraph 21, 22, 24 falsefalseConcentration of Credit Risk12Concentration of Credit RiskUnKnownUnKnownUnKnownUnKnownfalsetrue