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Revenue Recognition and Accounts Receivables - Summary Information for Receivable (Detail) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Jun. 30, 2017
Receivables [Abstract]            
Accounts receivable (net of contractual allowances) $ 5,717   $ 5,352      
Less allowance for concession adjustments (466) $ (459) (529) $ (569) $ (545) $ (552)
Patient accounts receivable - net $ 5,251   $ 4,823