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Discontinued Operations, Exit Activities, and Clinic Obligations (Major Classes of Assets and Liabilities) (Detail) - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Current assets:    
Other assets $ 15  
Total assets 15  
Current liabilities:    
Accounts payable and accrued expenses 294  
Total current liabilities 294 $ 841
Long-term lease obligations 7  
Total liabilities $ 301