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Related Party Transactions (Details) - USD ($)
3 Months Ended 6 Months Ended
May 31, 2017
Apr. 13, 2016
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Apr. 13, 2017
Related Party Transaction              
Interest income         $ 11,000 $ 3,000  
Contribution from Parent         1,900,000    
Parent Issuer UHS              
Related Party Transaction              
Interest income         11,000 3,000  
Contribution from Parent         1,900,000    
IPC | General Advisory And Management Services              
Related Party Transaction              
Specified amount of annual fees for ongoing advisory and management services         $ 500,000    
Annual fee for ongoing advisory and management services as a percentage of adjusted EBITDA         0.75%    
Amount incurred     $ 300,000 $ 200,000 $ 500,000 400,000  
Executive Officer | Promissory Note Agreement              
Related Party Transaction              
Interest income     $ 7,000 $ 3,000 $ 11,000 $ 3,000  
Executive Officer | Promissory Note Agreement | Other Noncurrent Assets              
Related Party Transaction              
Note receivable   $ 1,000,000         $ 900,000
Executive Officer | Promissory Note Agreement | Minimum              
Related Party Transaction              
Interest rate   1.45%          
Executive Officer | Promissory Note Agreement | Maximum              
Related Party Transaction              
Interest rate   2.12%          
Executive Officer | Parent Issuer UHS              
Related Party Transaction              
Unregistered shares sold by Parent 1,596,640            
Contribution from Parent $ 1,900,000