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Basis of Financial Statement Presentation (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Mar. 31, 2019
ASU 2018-02 |  |
Basis of Financial Statement Presentation |  |
Reclassification from accumulated other comprehensive loss to retained earnings | $ 66 |
Forecast | ASU 2016-02 |  |
Basis of Financial Statement Presentation |  |
Finance obligation under lease agreements |  | $ 1,000

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- Definition Present value of lessee's discounted obligation for lease payments from finance lease. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918701-209980 + Details
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