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Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.","units":{"USD":[{"end":"2015-12-31","val":466085,"accn":"0001415889-16-005062","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-14","frame":"CY2015Q4I"},{"end":"2016-03-31","val":466085,"accn":"0001415889-16-005790","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-09","frame":"CY2016Q1I"},{"end":"2016-06-30","val":466085,"accn":"0001415889-16-006776","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-11","frame":"CY2016Q2I"},{"end":"2016-09-30","val":466085,"accn":"0001654954-16-003593","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-07","frame":"CY2016Q3I"},{"end":"2016-12-31","val":480068,"accn":"0001654954-17-001584","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-01","frame":"CY2016Q4I"},{"end":"2017-03-31","val":478900,"accn":"0001654954-17-004995","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-22","frame":"CY2017Q1I"},{"end":"2017-06-30","val":478900,"accn":"0001654954-17-007586","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-14","frame":"CY2017Q2I"},{"end":"2017-09-30","val":478900,"accn":"0001654954-17-010141","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07","frame":"CY2017Q3I"},{"end":"2017-12-31","val":493267,"accn":"0001654954-18-003518","fy":2017,"fp":"FY","form":"10-K","filed":"2018-04-02"},{"end":"2017-12-31","val":493267,"accn":"0001654954-18-011102","fy":2017,"fp":"FY","form":"10-K/A","filed":"2018-10-15","frame":"CY2017Q4I"},{"end":"2018-03-31","val":493267,"accn":"0001654954-18-011103","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-10-15","frame":"CY2018Q1I"},{"end":"2018-06-30","val":494470,"accn":"0001654954-18-011104","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-10-15","frame":"CY2018Q2I"},{"end":"2018-09-30","val":494470,"accn":"0001654954-18-012555","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-13","frame":"CY2018Q3I"}]}},"OperatingLeasesFutureMinimumPaymentsDueInThreeYears":{"label":"Operating Leases, Future Minimum Payments, Due in Three Years","description":"Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the third fiscal year following the latest fiscal year. 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Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.","units":{"USD":[{"end":"2013-03-31","val":0,"accn":"0001193125-13-214518","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":0,"accn":"0001193125-13-329279","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-09","frame":"CY2013Q2I"},{"end":"2015-12-31","val":535776,"accn":"0001415889-16-005062","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-14","frame":"CY2015Q4I"},{"end":"2016-03-31","val":535776,"accn":"0001415889-16-005790","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-09","frame":"CY2016Q1I"},{"end":"2016-06-30","val":535776,"accn":"0001415889-16-006776","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-11","frame":"CY2016Q2I"},{"end":"2016-09-30","val":535776,"accn":"0001654954-16-003593","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-07","frame":"CY2016Q3I"},{"end":"2016-12-31","val":41306,"accn":"0001654954-17-001584","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-01","frame":"CY2016Q4I"},{"end":"2017-03-31","val":82612,"accn":"0001654954-17-004995","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-22","frame":"CY2017Q1I"},{"end":"2017-06-30","val":82612,"accn":"0001654954-17-007586","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-14","frame":"CY2017Q2I"},{"end":"2017-09-30","val":82612,"accn":"0001654954-17-010141","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07","frame":"CY2017Q3I"},{"end":"2017-12-31","val":82612,"accn":"0001654954-18-003518","fy":2017,"fp":"FY","form":"10-K","filed":"2018-04-02"},{"end":"2017-12-31","val":82612,"accn":"0001654954-18-011102","fy":2017,"fp":"FY","form":"10-K/A","filed":"2018-10-15","frame":"CY2017Q4I"}]}},"OperatingLeasesFutureMinimumPaymentsRemainderOfFiscalYear":{"label":"Operating Leases, Future Minimum Payments, Remainder of Fiscal Year","description":"Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the remainder of the fiscal year following the latest fiscal year. 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taxes.","units":{"USD":[{"start":"2013-02-01","end":"2013-02-28","val":4500000,"accn":"0001193125-13-110213","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-15"},{"start":"2013-02-01","end":"2013-02-28","val":4500000,"accn":"0001193125-13-214518","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-02-01","end":"2013-02-28","val":4500000,"accn":"0001193125-13-329279","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-09"},{"start":"2013-02-01","end":"2013-02-28","val":4500000,"accn":"0001193125-13-438444","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-12"},{"start":"2013-02-27","end":"2013-02-28","val":4500000,"accn":"0001193125-14-091700","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-10"},{"start":"2013-02-27","end":"2013-02-28","val":4500000,"accn":"0001193125-14-201345","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-15"},{"end":"2013-02-28","val":4500000,"accn":"0001193125-14-302368","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-08","frame":"CY2013Q1I"}]}},"OperatingLeasesRentExpenseNet":{"label":"Operating 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Leases, Rent Expense, Sublease Rentals","description":"The total amount of sublease rental income recognized during the period that reduces the entity's rent expense incurred under operating 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-Q","filed":"2017-08-14"},{"end":"2016-12-31","val":168597,"accn":"0001654954-17-010141","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-12-31","val":168597,"accn":"0001654954-18-003518","fy":2017,"fp":"FY","form":"10-K","filed":"2018-04-02"},{"end":"2016-12-31","val":168597,"accn":"0001654954-18-011102","fy":2017,"fp":"FY","form":"10-K/A","filed":"2018-10-15","frame":"CY2016Q4I"},{"end":"2017-03-31","val":337240,"accn":"0001654954-17-004995","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-22","frame":"CY2017Q1I"},{"end":"2017-06-30","val":168597,"accn":"0001654954-17-007586","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-14","frame":"CY2017Q2I"},{"end":"2017-09-30","val":178597,"accn":"0001654954-17-010141","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07","frame":"CY2017Q3I"},{"end":"2017-12-31","val":178597,"accn":"0001654954-18-003518","fy":2017,"fp":"FY","form":"10-K","filed":"2018-04-02"},{"end":"2017-12-31","val":178597,"accn":"0001654954-18-011102","fy":2017,"fp":"FY","form":"10-K/A","filed":"2018-10-15"},{"end":"2017-12-31","val":178597,"accn":"0001654954-18-011103","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-10-15"},{"end":"2017-12-31","val":178597,"accn":"0001654954-18-011104","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-10-15"},{"end":"2017-12-31","val":178597,"accn":"0001654954-18-012555","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-13","frame":"CY2017Q4I"},{"end":"2018-03-31","val":178567,"accn":"0001654954-18-011103","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-10-15","frame":"CY2018Q1I"},{"end":"2018-06-30","val":178597,"accn":"0001654954-18-011104","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-10-15","frame":"CY2018Q2I"},{"end":"2018-09-30","val":178597,"accn":"0001654954-18-012555","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-13","frame":"CY2018Q3I"}]}},"OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax":{"label":"OCI, 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