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Discontinued Operations - Assets and Liabilities of Discontinued Operations on Condensed Consolidated Balance Sheets (Detail) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Disposal Group Including Discontinued Operation Balance Sheet Disclosures [Abstract]    
Receivables, net $ 513 $ 382
Total current assets 513 382
Deferred income tax assets, net 1,585 1,585
Total assets of discontinued operations 2,098 1,967
Accounts payable and accrued expenses 113 185
Remaining lease obligations 4,188 5,516
Total current liabilities 4,301 5,701
Remaining lease obligations   785
Total liabilities of discontinued operations $ 4,301 $ 6,486