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Discontinued Operations - Summary of Non-Cash Adjustments Related to Discontinued Operations (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Noncash Investing and Financing Items [Abstract]    
Depreciation and amortization $ 467 $ 1,207
Provision for excess inventory $ 0 433
Loss on asset disposal   $ 23