2.4.0.8107 - Disclosure - Fair Value Measurementstruefalsefalse1false falsefalsefrom-2013-01-01-to-2013-06-30.363.0.0.0.0.0.0.0http://www.sec.gov/CIK0001120970duration2013-01-01T00:00:002013-06-30T00:00:001true 1us-gaap_FairValueDisclosuresAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Fair Value Measurements [Abstract]2false 2us-gaap_FairValueDisclosuresTextBlockus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00<div> <div> 7. Fair Value Measurements   The fair value of a financial instrument is the amount that could be received upon the sale of an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Fair value measurements do not include transaction costs.  A fair value hierarchy is used to prioritize the quality and reliability of the information used to determine fair values.  Categorization within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement.  The fair value hierarchy is defined into the following three categories:   Level 1: Quoted market prices in active markets for identical assets or liabilities. Level 2: Observable market-based inputs or unobservable inputs that are corroborated by market data. Level 3: Unobservable inputs that are not corroborated by market data.   We had no assets measured at fair value on a recurring basis at June 30, 2013 and December 31, 2012. During the six months ended June 30, 2013 and twelve months ended December 31, 2012, there were no transfers of assets or liabilities between Level 1, Level 2, or Level 3.    The carrying amount of cash and cash equivalents, and trade payables and receivables approximates fair value because of the short-term maturity of these financial instruments. The fair value of long-term debt obligations approximates carrying value at June 30, 2013 and December 31, 2012. The fair value of assets and liabilities whose carrying value approximates fair value is determined using Level 2 inputs, with the exception of cash and cash equivalents (Level 1).   Following is a description of the valuation methodologies used for the Company's financial instruments measured at fair value on a recurring basis as well as the general classification of such instruments pursuant to the valuation hierarchy.   Derivative liability - contingent dividend - The Company's contingent dividend derivative liability is valued using models with various observed and unobservable market inputs and classified as Level 3 in the valuation hierarchy. These market inputs include volatility, stock price, maturity date, and discount rate. The contingent dividend derivative was valued at $25,080 and $230,900 at June 30, 2013 and December 31, 2012, respectively, and the change in the derivative value between these periods related solely to the change in fair value. The derivative expires on August 31, 2013.   Gold Call Derivative - The Company's gold calls are valued using a Black-Scholes model with various observable inputs and classified as Level 2 in the valuation hierarchy. These market inputs include volatility of gold prices, gold strike prices, maturity dates of the options, exercise prices of the options, and risk free interest rates. The gold call derivative value was not material at June 30, 2013 and December 31, 2012.   Gold Forward Derivative - The Company's gold forwards are valued based on observable market changes in the forward prices for gold and classified as Level 2 in the valuation hierarchy. The gold forward derivative was valued at $0 and $297,451 at June 30, 2013 and December 31, 2012, respectively. </div> </div>falsefalsefalsenonnum:textBlockItemTypenaThe entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13537-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13433-108611 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14064-108612 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13504-108611 false0Fair Value MeasurementsfalseFair Value MeasurementsUnKnownUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.comstockmining.com/role/FairValueMeasurements12