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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":"2010-12-31","val":1052000,"accn":"0001193125-12-070820","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-22","frame":"CY2010Q4I"},{"end":"2011-12-31","val":328000,"accn":"0001193125-12-070820","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-22"},{"end":"2011-12-31","val":328000,"accn":"0001193125-13-070254","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-12-31","val":234000,"accn":"0001193125-13-070254","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":234000,"accn":"0001193125-14-060845","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-20","frame":"CY2012Q4I"},{"end":"2013-12-31","val":502000,"accn":"0001193125-14-060845","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-20"},{"end":"2013-12-31","val":502000,"accn":"0001193125-15-056354","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-20","frame":"CY2013Q4I"},{"end":"2014-12-31","val":313000,"accn":"0001193125-15-056354","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-20"},{"end":"2014-12-31","val":313000,"accn":"0001564590-16-012937","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-19","frame":"CY2014Q4I"},{"end":"2015-12-31","val":766000,"accn":"0001564590-16-012937","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-19","frame":"CY2015Q4I"}]}},"AccruedRentCurrentAndNoncurrent":{"label":"Accrued Rent","description":"Carrying value as of the balance sheet date of obligations incurred through that date and payable for contractual rent under lease arrangements.","units":{"USD":[{"end":"2010-12-31","val":400000,"accn":"0001193125-12-070820","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-22","frame":"CY2010Q4I"},{"end":"2011-12-31","val":600000,"accn":"0001193125-12-070820","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-22"},{"end":"2011-12-31","val":600000,"accn":"0001193125-13-070254","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-12-31","val":6900000,"accn":"0001193125-13-070254","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":6900000,"accn":"0001193125-14-060845","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-20","frame":"CY2012Q4I"},{"end":"2013-12-31","val":7500000,"accn":"0001193125-14-060845","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-20"},{"end":"2013-12-31","val":7500000,"accn":"0001193125-15-056354","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-20","frame":"CY2013Q4I"},{"end":"2014-12-31","val":9700000,"accn":"0001193125-15-056354","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-20"},{"end":"2014-12-31","val":9700000,"accn":"0001564590-16-012937","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-19","frame":"CY2014Q4I"},{"end":"2015-12-31","val":10500000,"accn":"0001564590-16-012937","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-19"},{"end":"2015-12-31","val":10500000,"accn":"0001564590-17-002582","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-27","frame":"CY2015Q4I"},{"end":"2016-12-31","val":13600000,"accn":"0001564590-17-002582","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-27"},{"end":"2016-12-31","val":13600000,"accn":"0001564590-18-002889","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-22","frame":"CY2016Q4I"},{"end":"2017-12-31","val":13000000,"accn":"0001564590-18-002889","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-22","frame":"CY2017Q4I"}]}},"AccruedSalesCommissionCurrent":{"label":"Accrued Sales Commission, Current","description":"Carrying value as of the balance sheet date of obligations incurred through that date and payable for sales commissions. 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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":"2010-12-31","val":2156000,"accn":"0001193125-12-070820","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-22","frame":"CY2010Q4I"},{"end":"2011-12-31","val":2357000,"accn":"0001193125-12-070820","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-22"},{"end":"2011-12-31","val":2357000,"accn":"0001193125-13-070254","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-12-31","val":2615000,"accn":"0001193125-13-070254","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":2615000,"accn":"0001193125-14-060845","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-20","frame":"CY2012Q4I"},{"end":"2013-12-31","val":2775000,"accn":"0001193125-14-060845","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-20"},{"end":"2013-12-31","val":2775000,"accn":"0001193125-15-056354","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-20","frame":"CY2013Q4I"},{"end":"2014-12-31","val":3061000,"accn":"0001193125-15-056354","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-20"},{"end":"2014-12-31","val":3061000,"accn":"0001564590-16-012937","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-19","frame":"CY2014Q4I"},{"end":"2015-12-31","val":3513000,"accn":"0001564590-16-012937","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-19"},{"end":"2015-12-31","val":3513000,"accn":"0001564590-17-002582","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-27","frame":"CY2015Q4I"},{"end":"2016-12-31","val":4099000,"accn":"0001564590-17-002582","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-27"},{"end":"2016-12-31","val":4099000,"accn":"0001564590-18-002889","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-22","frame":"CY2016Q4I"},{"end":"2017-12-31","val":364000,"accn":"0001564590-18-002889","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-22","frame":"CY2017Q4I"}]}},"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":"2010-12-31","val":11805000,"accn":"0001193125-12-070820","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-22","frame":"CY2010Q4I"},{"end":"2011-12-31","val":10440000,"accn":"0001193125-12-070820","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-22"},{"end":"2011-12-31","val":10440000,"accn":"0001193125-13-070254","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-12-31","val":6536000,"accn":"0001193125-13-070254","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":6536000,"accn":"0001193125-14-060845","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-20","frame":"CY2012Q4I"},{"end":"2013-12-31","val":10561000,"accn":"0001193125-14-060845","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-20"},{"end":"2013-12-31","val":10561000,"accn":"0001193125-15-056354","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-20","frame":"CY2013Q4I"},{"end":"2014-12-31","val":12531000,"accn":"0001193125-15-056354","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-20"},{"end":"2014-12-31","val":12531000,"accn":"0001564590-16-012937","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-19","frame":"CY2014Q4I"},{"end":"2015-12-31","val":18595000,"accn":"0001564590-16-012937","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-19"},{"end":"2015-12-31","val":18595000,"accn":"0001564590-17-002582","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-27","frame":"CY2015Q4I"},{"end":"2016-12-31","val":26691000,"accn":"0001564590-17-002582","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-27"},{"end":"2016-12-31","val":26691000,"accn":"0001564590-18-002889","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-22","frame":"CY2016Q4I"},{"end":"2017-12-31","val":33658000,"accn":"0001564590-18-002889","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-22","frame":"CY2017Q4I"}]}},"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. 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Cash Equivalents, and Short-term Investments","description":"Cash includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the customer may deposit additional funds at any time and effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid Investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Short-term investments, exclusive of cash equivalents, generally consist of marketable securities intended to be sold within one year (or the normal operating cycle if longer) and may include trading securities, available-for-sale securities, or held-to-maturity securities (if maturing within one year), as applicable.","units":{"USD":[{"end":"2017-12-31","val":224543000,"accn":"0001564590-18-011981","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q4I"},{"end":"2018-03-31","val":238819000,"accn":"0001564590-18-011981","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"}]}},"ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights":{"label":"Class of Warrant or Right, Number of Securities Called by Warrants or Rights","description":"Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.","units":{"shares":[{"end":"2010-12-31","val":0,"accn":"0001193125-12-070820","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-22","frame":"CY2010Q4I"},{"end":"2011-12-31","val":0,"accn":"0001193125-12-070820","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-22","frame":"CY2011Q4I"}]}},"CommitmentsAndContingencies":{"label":"Commitments and Contingencies","description":"Represents the caption on the face of the balance sheet to indicate that the entity has entered into (1) purchase or supply arrangements that will require expending a portion of its resources to meet the terms thereof, and (2) is exposed to potential losses or, less frequently, gains, arising from (a) possible claims against a company's resources due to future performance under contract terms, and (b) possible losses or likely gains from uncertainties that will ultimately be resolved when one or more future events that are deemed likely to occur do occur or fail to occur.","units":{"USD":[{"end":"2017-12-31","val":0,"accn":"0001564590-18-011981","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q4I"},{"end":"2018-03-31","val":0,"accn":"0001564590-18-011981","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"}]}},"CommonStockCapitalSharesReservedForFutureIssuance":{"label":"Common Stock, Capital Shares Reserved for Future Issuance","description":"Aggregate number of common shares reserved for future 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