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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":"2016-12-31","val":4178000,"accn":"0001457612-17-000050","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-03","frame":"CY2016Q4I"},{"end":"2017-09-30","val":6321000,"accn":"0001457612-17-000050","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-03","frame":"CY2017Q3I"},{"end":"2017-12-31","val":5604000,"accn":"0001457612-18-000041","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":5604000,"accn":"0001457612-18-000078","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-03"},{"end":"2017-12-31","val":5604000,"accn":"0001457612-18-000112","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-01","frame":"CY2017Q4I"},{"end":"2018-03-31","val":4427000,"accn":"0001457612-18-000041","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":3075000,"accn":"0001457612-18-000078","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-03","frame":"CY2018Q2I"},{"end":"2018-09-30","val":4233000,"accn":"0001457612-18-000112","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-01","frame":"CY2018Q3I"},{"end":"2018-12-31","val":3816000,"accn":"0001457612-19-000062","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-04-30"},{"end":"2018-12-31","val":3816000,"accn":"0001457612-19-000123","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-07-25"},{"end":"2018-12-31","val":3816000,"accn":"0001457612-19-000133","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-10-24","frame":"CY2018Q4I"},{"end":"2019-03-31","val":2965000,"accn":"0001457612-19-000062","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-04-30","frame":"CY2019Q1I"},{"end":"2019-06-30","val":5050000,"accn":"0001457612-19-000123","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-07-25","frame":"CY2019Q2I"},{"end":"2019-09-30","val":4111000,"accn":"0001457612-19-000133","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-10-24","frame":"CY2019Q3I"},{"end":"2019-12-31","val":4611000,"accn":"0001457612-20-000049","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-04-30"},{"end":"2019-12-31","val":4611000,"accn":"0001457612-20-000125","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-07-23"},{"end":"2019-12-31","val":4611000,"accn":"0001457612-20-000170","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-10-29","frame":"CY2019Q4I"},{"end":"2020-03-31","val":4077000,"accn":"0001457612-20-000049","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-04-30","frame":"CY2020Q1I"},{"end":"2020-06-30","val":4071000,"accn":"0001457612-20-000125","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-07-23","frame":"CY2020Q2I"},{"end":"2020-09-30","val":5784000,"accn":"0001457612-20-000170","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-10-29","frame":"CY2020Q3I"}]}},"AccruedProfessionalFeesCurrent":{"label":"Accrued Professional Fees, Current","description":"Carrying value as of the balance sheet date of obligations incurred through that date and payable for professional fees, such as for legal and accounting services received. 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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":"2016-03-31","val":95700000,"accn":"0001457612-16-000062","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-06","frame":"CY2016Q1I"},{"end":"2016-06-30","val":86000000,"accn":"0001457612-16-000073","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-05","frame":"CY2016Q2I"},{"end":"2016-09-30","val":75500000,"accn":"0001457612-16-000082","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-04","frame":"CY2016Q3I"},{"end":"2017-03-31","val":48700000,"accn":"0001457612-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-05","frame":"CY2017Q1I"},{"end":"2017-06-30","val":35200000,"accn":"0001457612-17-000039","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09","frame":"CY2017Q2I"},{"end":"2017-09-30","val":22000000,"accn":"0001457612-17-000050","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-03","frame":"CY2017Q3I"}]}},"CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents":{"label":"Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents","description":"Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, 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 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Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, 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.","units":{"USD":[{"start":"2017-01-01","end":"2017-12-31","val":-15151000,"accn":"0001457612-19-000027","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":14089000,"accn":"0001457612-19-000027","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":14089000,"accn":"0001457612-20-000015","fy":2019,"fp":"FY","form":"10-K","filed":"2020-02-13","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":14080000,"accn":"0001457612-20-000015","fy":2019,"fp":"FY","form":"10-K","filed":"2020-02-13"},{"start":"2019-01-01","end":"2019-12-31","val":14080000,"accn":"0001457612-21-000022","fy":2020,"fp":"FY","form":"10-K","filed":"2021-02-22","frame":"CY2019"},{"start":"2020-01-01","end":"2020-12-31","val":39642000,"accn":"0001457612-21-000022","fy":2020,"fp":"FY","form":"10-K","filed":"2021-02-22"},{"start":"2020-01-01","end":"2020-12-31","val":39642000,"accn":"0001457612-22-000039","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-18","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":-42621000,"accn":"0001457612-22-000039","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-18","frame":"CY2021"}]}},"CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect":{"label":"Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect","description":"Amount of increase (decrease) in cash, cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including effect from exchange rate change. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. 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