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Discontinued Operations - Assets and Liabilities of Discontinued Operations on Consolidated Balance Sheets (Detail) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Disposal Group Including Discontinued Operation Balance Sheet Disclosures [Abstract]    
Receivables, net   $ 382
Total current assets   382
Deferred income tax assets, net $ 178 1,585
Total assets of discontinued operations 178 1,967
Accounts payable and accrued expenses 51 185
Remaining lease obligations 485 5,516
Total current liabilities 536 5,701
Remaining lease obligations   785
Total liabilities of discontinued operations $ 536 $ 6,486