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Trade Receivables & Trade Receivables - Related Parties - Summary of Trade Receivables (Detail) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Accounts Receivable Net Current [Abstract]    
Trade $ 804 $ 432
Due from Settlement Attorneys 441 0
Other 84 59
Trade receivables $ 1,329 $ 491