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Examples include taxes, interest, rent, salaries and benefits, and utilities. For classified balance sheets, used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer); for unclassified balance sheets, used to reflect the total liabilities (regardless of due date).","units":{"USD":[{"end":"2008-12-31","val":2407000,"accn":"0001193125-09-111401","fy":2009,"fp":"Q1","form":"10-Q","filed":"2009-05-14","frame":"CY2008Q4I"},{"end":"2009-03-31","val":2334000,"accn":"0001193125-09-111401","fy":2009,"fp":"Q1","form":"10-Q","filed":"2009-05-14","frame":"CY2009Q1I"}]}},"AccountsPayableAndAccruedLiabilitiesCurrent":{"label":"Accounts Payable and Accrued Liabilities, Current","description":"Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.","units":{"USD":[{"end":"2008-12-31","val":2407000,"accn":"0001193125-09-235226","fy":2009,"fp":"Q3","form":"10-Q","filed":"2009-11-16","frame":"CY2008Q4I"},{"end":"2008-12-31","val":2407000,"accn":"0001193125-09-174453","fy":2009,"fp":"Q2","form":"10-Q","filed":"2009-08-13"},{"end":"2009-06-30","val":2229000,"accn":"0001193125-09-174453","fy":2009,"fp":"Q2","form":"10-Q","filed":"2009-08-13","frame":"CY2009Q2I"},{"end":"2009-09-30","val":2185000,"accn":"0001193125-09-235226","fy":2009,"fp":"Q3","form":"10-Q","filed":"2009-11-16","frame":"CY2009Q3I"},{"end":"2009-12-31","val":2546000,"accn":"0001193125-10-258861","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-12","frame":"CY2009Q4I"},{"end":"2009-12-31","val":2546000,"accn":"0001193125-10-188510","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-13"},{"end":"2009-12-31","val":2546000,"accn":"0001193125-10-121953","fy":2010,"fp":"Q1","form":"10-Q","filed":"2010-05-17"},{"end":"2010-03-31","val":1998000,"accn":"0001193125-10-121953","fy":2010,"fp":"Q1","form":"10-Q","filed":"2010-05-17","frame":"CY2010Q1I"},{"end":"2010-06-30","val":2888000,"accn":"0001193125-10-188510","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-13","frame":"CY2010Q2I"},{"end":"2010-09-30","val":2786000,"accn":"0001193125-10-258861","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-12","frame":"CY2010Q3I"},{"end":"2010-12-31","val":3879000,"accn":"0001193125-11-307045","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-10","frame":"CY2010Q4I"},{"end":"2010-12-31","val":3879000,"accn":"0001193125-11-214300","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-08"},{"end":"2010-12-31","val":3879000,"accn":"0001193125-11-137576","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-12"},{"end":"2011-03-31","val":3210000,"accn":"0001193125-11-137576","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-12","frame":"CY2011Q1I"},{"end":"2011-06-30","val":4143000,"accn":"0001193125-11-214300","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-08","frame":"CY2011Q2I"},{"end":"2011-09-30","val":5826000,"accn":"0001193125-11-307045","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-10","frame":"CY2011Q3I"},{"end":"2011-12-31","val":4798000,"accn":"0001193125-12-354745","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-14","frame":"CY2011Q4I"},{"end":"2011-12-31","val":4798000,"accn":"0001193125-12-208538","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2012-03-31","val":4743000,"accn":"0001193125-12-208538","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":6952000,"accn":"0001193125-12-354745","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-14","frame":"CY2012Q2I"}]}},"AccountsPayableCurrent":{"label":"Accounts Payable, Current","description":"Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).","units":{"USD":[{"end":"2008-12-31","val":824000,"accn":"0001193125-10-072909","fy":2009,"fp":"FY","form":"10-K","filed":"2010-03-31","frame":"CY2008Q4I"},{"end":"2009-12-31","val":803000,"accn":"0001193125-11-064906","fy":2010,"fp":"FY","form":"10-K","filed":"2011-03-14","frame":"CY2009Q4I"},{"end":"2009-12-31","val":803000,"accn":"0001193125-10-072909","fy":2009,"fp":"FY","form":"10-K","filed":"2010-03-31"},{"end":"2010-12-31","val":2033000,"accn":"0001193125-12-112092","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2010Q4I"},{"end":"2010-12-31","val":2033000,"accn":"0001193125-11-064906","fy":2010,"fp":"FY","form":"10-K","filed":"2011-03-14"},{"end":"2011-12-31","val":1498000,"accn":"0001193125-12-112092","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2011Q4I"}]}},"AccountsPayableOtherCurrent":{"label":"Accounts Payable, Other, Current","description":"Amount of obligations incurred classified as other, payable within one year or the normal operating cycle, if longer.","units":{"USD":[{"end":"2011-12-31","val":238000,"accn":"0001193125-12-112092","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2011Q4I"}]}},"AccruedBonusesCurrent":{"label":"Accrued Bonuses, Current","description":"Carrying value as of the balance sheet date of obligations incurred and payable for incentive compensation awarded to employees and directors or earned by them based on the terms of one or more relevant arrangements. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).","units":{"USD":[{"end":"2011-12-31","val":850000,"accn":"0001193125-12-112092","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2011Q4I"}]}},"AccruedLiabilitiesCurrent":{"label":"Accrued Liabilities, Current","description":"Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. 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Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).","units":{"USD":[{"end":"2011-12-31","val":35000,"accn":"0001193125-12-112092","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2011Q4I"}]}},"AccruedVacationCurrent":{"label":"Accrued Vacation, Current","description":"Carrying value as of the balance sheet date of obligations incurred and payable for unused vacation time owed to employees based on the entity's vacation benefit given to its employees. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).","units":{"USD":[{"end":"2011-12-31","val":552000,"accn":"0001193125-12-112092","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2011Q4I"}]}},"AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment":{"label":"Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment","description":"Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.","units":{"USD":[{"end":"2008-12-31","val":6662000,"accn":"0001193125-10-072909","fy":2009,"fp":"FY","form":"10-K","filed":"2010-03-31","frame":"CY2008Q4I"},{"end":"2009-12-31","val":7611000,"accn":"0001193125-11-064906","fy":2010,"fp":"FY","form":"10-K","filed":"2011-03-14","frame":"CY2009Q4I"},{"end":"2009-12-31","val":7611000,"accn":"0001193125-10-258861","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-12"},{"end":"2009-12-31","val":7611000,"accn":"0001193125-10-188510","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-13"},{"end":"2009-12-31","val":7611000,"accn":"0001193125-10-072909","fy":2009,"fp":"FY","form":"10-K","filed":"2010-03-31"},{"end":"2010-06-30","val":8376000,"accn":"0001193125-10-188510","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-13","frame":"CY2010Q2I"},{"end":"2010-09-30","val":8865000,"accn":"0001193125-10-258861","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-12","frame":"CY2010Q3I"},{"end":"2010-12-31","val":9695000,"accn":"0001193125-12-112092","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2010Q4I"},{"end":"2010-12-31","val":9429000,"accn":"0001193125-11-307045","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-10"},{"end":"2010-12-31","val":9429000,"accn":"0001193125-11-214300","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-08"},{"end":"2010-12-31","val":9429000,"accn":"0001193125-11-137576","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-12"},{"end":"2010-12-31","val":9695000,"accn":"0001193125-11-064906","fy":2010,"fp":"FY","form":"10-K","filed":"2011-03-14"},{"end":"2011-03-31","val":10027000,"accn":"0001193125-11-137576","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-12","frame":"CY2011Q1I"},{"end":"2011-06-30","val":10599000,"accn":"0001193125-11-214300","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-08","frame":"CY2011Q2I"},{"end":"2011-09-30","val":11033000,"accn":"0001193125-11-307045","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-10","frame":"CY2011Q3I"},{"end":"2011-12-31","val":11608000,"accn":"0001193125-12-354745","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-14","frame":"CY2011Q4I"},{"end":"2011-12-31","val":11608000,"accn":"0001193125-12-208538","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":11608000,"accn":"0001193125-12-112092","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"end":"2012-03-31","val":12158000,"accn":"0001193125-12-208538","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":12704000,"accn":"0001193125-12-354745","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-14","frame":"CY2012Q2I"}]}},"AdditionalPaidInCapital":{"label":"Additional Paid in Capital","description":"Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred 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Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Includes effect from exchange rate changes.","units":{"USD":[{"start":"2007-01-01","end":"2007-12-31","val":703000,"accn":"0001193125-10-072909","fy":2009,"fp":"FY","form":"10-K","filed":"2010-03-31","frame":"CY2007"},{"start":"2008-01-01","end":"2008-03-31","val":-1284000,"accn":"0001193125-09-111401","fy":2009,"fp":"Q1","form":"10-Q","filed":"2009-05-14","frame":"CY2008Q1"},{"start":"2008-01-01","end":"2008-06-30","val":-906000,"accn":"0001193125-09-174453","fy":2009,"fp":"Q2","form":"10-Q","filed":"2009-08-13"},{"start":"2008-01-01","end":"2008-09-30","val":-914000,"accn":"0001193125-09-235226","fy":2009,"fp":"Q3","form":"10-Q","filed":"2009-11-16"},{"start":"2008-01-01","end":"2008-12-31","val":-1506000,"accn":"0001193125-11-064906","fy":2010,"fp":"FY","form":"10-K","filed":"2011-03-14","frame":"CY2008"},{"start":"2008-01-01","end":"2008-12-31","val":-1506000,"accn":"0001193125-10-072909","fy":2009,"fp":"FY","form":"10-K","filed":"2010-03-31"},{"start":"2009-01-01","end":"2009-03-31","val":-332000,"accn":"0001193125-10-121953","fy":2010,"fp":"Q1","form":"10-Q","filed":"2010-05-17","frame":"CY2009Q1"},{"start":"2009-01-01","end":"2009-03-31","val":-332000,"accn":"0001193125-09-111401","fy":2009,"fp":"Q1","form":"10-Q","filed":"2009-05-14"},{"start":"2009-01-01","end":"2009-06-30","val":-854000,"accn":"0001193125-10-188510","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-13"},{"start":"2009-01-01","end":"2009-06-30","val":-854000,"accn":"0001193125-09-174453","fy":2009,"fp":"Q2","form":"10-Q","filed":"2009-08-13"},{"start":"2009-01-01","end":"2009-09-30","val":-538000,"accn":"0001193125-10-258861","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-12"},{"start":"2009-01-01","end":"2009-09-30","val":-538000,"accn":"0001193125-09-235226","fy":2009,"fp":"Q3","form":"10-Q","filed":"2009-11-16"},{"start":"2009-01-01","end":"2009-12-31","val":39000,"accn":"0001193125-12-112092","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2009-01-01","end":"2009-12-31","val":39000,"accn":"0001193125-11-064906","fy":2010,"fp":"FY","form":"10-K","filed":"2011-03-14"},{"start":"2009-01-01","end":"2009-12-31","val":39000,"accn":"0001193125-10-072909","fy":2009,"fp":"FY","form":"10-K","filed":"2010-03-31"},{"start":"2010-01-01","end":"2010-03-31","val":9938000,"accn":"0001193125-11-137576","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-12","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-03-31","val":9938000,"accn":"0001193125-10-121953","fy":2010,"fp":"Q1","form":"10-Q","filed":"2010-05-17"},{"start":"2010-01-01","end":"2010-06-30","val":8746000,"accn":"0001193125-11-214300","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-08"},{"start":"2010-01-01","end":"2010-06-30","val":8746000,"accn":"0001193125-10-188510","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-13"},{"start":"2010-01-01","end":"2010-09-30","val":7402000,"accn":"0001193125-11-307045","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-10"},{"start":"2010-01-01","end":"2010-09-30","val":7402000,"accn":"0001193125-10-258861","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-12"},{"start":"2010-01-01","end":"2010-12-31","val":8664000,"accn":"0001193125-12-112092","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2010"},{"start":"2010-01-01","end":"2010-12-31","val":8664000,"accn":"0001193125-11-064906","fy":2010,"fp":"FY","form":"10-K","filed":"2011-03-14"},{"start":"2011-01-01","end":"2011-03-31","val":-4504000,"accn":"0001193125-12-208538","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-03-31","val":-4504000,"accn":"0001193125-11-137576","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-12"},{"start":"2011-01-01","end":"2011-06-30","val":-4098000,"accn":"0001193125-12-354745","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-14"},{"start":"2011-01-01","end":"2011-06-30","val":-4098000,"accn":"0001193125-11-214300","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-08"},{"start":"2011-01-01","end":"2011-09-30","val":-4083000,"accn":"0001193125-11-307045","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-10"},{"start":"2011-01-01","end":"2011-12-31","val":-5347000,"accn":"0001193125-12-112092","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":-2172000,"accn":"0001193125-12-208538","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":-1022000,"accn":"0001193125-12-354745","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-14"}]}},"CertificatesOfDepositAtCarryingValue":{"label":"Certificates of Deposit, at Carrying Value","description":"A savings certificate entitling the Entity (that is, bearer) to receive interest at an established maturity date, based upon a fixed interest rate. 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