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Variable Interest Entity (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Variable Interest Entity [Abstract]        
Net (loss) income $ (392) $ 312 $ (913) $ (21)
Aggregate funding (provided by) repaid to the Company, net $ (479) $ 173 $ (422) $ 202