Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies Related to Discontinued Operations (Details)

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Commitments and Contingencies Related to Discontinued Operations (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Discontinued Operations and Disposal Groups [Abstract]    
Contingency provision within discontinued operations $ 498 $ 522