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Indebtedness (Tables) | 12 Months Ended
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Dec. 31, 2017
Indebtedness [Abstract] |
Future Maturities On Debt And Capital Lease Obligations |
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﻿2018 |  | $ | 1,468
﻿2019 |  |  | 3,755
﻿2020 |  |  | 8,305
﻿2021 |  |  | 8,309
﻿2022 |  |  | 8,335
﻿2023 and thereafter |  |  | 14,379
﻿Total payments |  | $ | 44,551
﻿Imputed interest on capital lease obligations |  |  | (7,129)
﻿Net debt obligations, of which $561 is current and $36,861 is noncurrent |  | $ | 37,422
﻿

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- Definition Tabular disclosure of the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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