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and Cash Equivalents, Period Increase (Decrease)","description":"Amount of increase (decrease) in cash and cash equivalents. 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":"2017-01-01","end":"2017-12-31","val":-383000,"accn":"0001437749-19-005272","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-19","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":5357000,"accn":"0001437749-19-009677","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-13","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":4373000,"accn":"0001437749-19-016595","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-13"},{"start":"2018-01-01","end":"2018-09-30","val":2545000,"accn":"0001437749-19-022682","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-13"},{"start":"2018-01-01","end":"2018-12-31","val":15470000,"accn":"0001437749-19-005272","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-19"},{"start":"2018-01-01","end":"2018-12-31","val":15470000,"accn":"0001437749-20-005906","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-23","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":-14064000,"accn":"0001437749-19-009677","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-13"},{"start":"2019-01-01","end":"2019-03-31","val":-14064000,"accn":"0001437749-20-010599","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-13","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":-13849000,"accn":"0001437749-19-016595","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-13"},{"start":"2019-01-01","end":"2019-09-30","val":-12082000,"accn":"0001437749-19-022682","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-13"},{"start":"2019-01-01","end":"2019-12-31","val":-12940000,"accn":"0001437749-20-005906","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-23","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":-583000,"accn":"0001437749-20-010599","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-13","frame":"CY2020Q1"}]}},"CashCashEquivalentsAndShortTermInvestments":{"label":"Cash, Cash Equivalents, and Short-term Investments","description":"Cash includes currency on hand as well as demand deposits with banks or financial institutions. 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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":"2019-12-31","val":7900000,"accn":"0001437749-20-005906","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-23","frame":"CY2019Q4I"},{"end":"2020-03-31","val":3300000,"accn":"0001437749-20-010599","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-13","frame":"CY2020Q1I"},{"end":"2020-06-30","val":5000000,"accn":"0001437749-20-017514","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-11","frame":"CY2020Q2I"},{"end":"2020-09-30","val":9800000,"accn":"0001437749-20-022537","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-04","frame":"CY2020Q3I"},{"end":"2021-03-31","val":3300000,"accn":"0001437749-21-010912","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-05","frame":"CY2021Q1I"},{"end":"2021-06-30","val":2200000,"accn":"0001437749-21-019480","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-11","frame":"CY2021Q2I"},{"end":"2021-09-30","val":16200000,"accn":"0001437749-21-026175","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-10","frame":"CY2021Q3I"},{"end":"2022-06-30","val":38400000,"accn":"0001437749-22-019848","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-11","frame":"CY2022Q2I"},{"end":"2022-09-30","val":36100000,"accn":"0001437749-22-026609","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-09","frame":"CY2022Q3I"},{"end":"2022-12-31","val":33500000,"accn":"0001437749-23-008189","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-28","frame":"CY2022Q4I"},{"end":"2023-03-31","val":28700000,"accn":"0001437749-23-014616","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-15","frame":"CY2023Q1I"},{"end":"2023-06-30","val":60700000,"accn":"0001437749-23-023708","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":56200000,"accn":"0001437749-23-031671","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-13","frame":"CY2023Q3I"},{"end":"2023-12-31","val":52900000,"accn":"0001437749-24-008522","fy":2023,"fp":"FY","form":"10-K","filed":"2024-03-19","frame":"CY2023Q4I"},{"end":"2024-03-31","val":46500000,"accn":"0001437749-24-015381","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-08","frame":"CY2024Q1I"},{"end":"2024-06-30","val":54100000,"accn":"0001437749-24-025198","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-07","frame":"CY2024Q2I"},{"end":"2024-09-30","val":50200000,"accn":"0001437749-24-034925","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-13","frame":"CY2024Q3I"},{"end":"2024-12-31","val":44100000,"accn":"0001437749-25-008018","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-17","frame":"CY2024Q4I"},{"end":"2025-03-31","val":37300000,"accn":"0001437749-25-016488","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-13","frame":"CY2025Q1I"},{"end":"2025-06-30","val":30000000,"accn":"0001437749-25-026207","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-12","frame":"CY2025Q2I"},{"end":"2025-09-30","val":55300000,"accn":"0001437749-25-034469","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-12","frame":"CY2025Q3I"},{"end":"2025-12-31","val":59900000,"accn":"0001437749-26-010342","fy":2025,"fp":"FY","form":"10-K","filed":"2026-03-30","frame":"CY2025Q4I"},{"end":"2026-03-31","val":51300000,"accn":"0001437749-26-015220","fy":2026,"fp":"Q1","form":"10-Q","filed":"2026-05-06","frame":"CY2026Q1I"}]}},"CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations":{"label":"Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations","description":"Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including, but not limited to, disposal group and discontinued operations. 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