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Debt (Narrative) (Detail 3) - USD ($)
$ in Thousands
1 Months Ended
Jun. 30, 2011
Mar. 31, 2018
Jun. 30, 2017
Debt Instrument [Line Items]      
Mortgage payable   $ 2,615 $ 2,763
Mortgage payable      
Debt Instrument [Line Items]      
Mortgage payable $ 3,947    
Mortgage payable, amortization period 20 years    
Debt interest rate   4.92%