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Commitments (Tables) | 12 Months Ended
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Dec. 31, 2017
Commitments And Contingencies Disclosure [Abstract] |
Schedule of future minimum lease payments, net of receipts due under terms of subleases under all operating leases | Future minimum lease payments, net of receipts due under the terms of subleases, under all operating leases at December 31, 2017 are as follows:
(in thousands) |  | Future Lease Payment |
2018 |  |  | 872 |
2019 |  |  | 501 |
2020 |  |  | 456 |
2021 |  |  | 281 |
2022 |  |  | — |
2023 |  |  | — |
|  | $ | 2,110 |

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- Definition Tabular disclosure of future minimum payments required in the aggregate and for each of the five succeeding fiscal years for operating leases having initial or remaining noncancelable lease terms in excess of one year and the total minimum rentals to be received in the future under noncancelable subleases as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717 + Details
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