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Fair Value Measurements (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Jun. 30, 2018
Assets    
Interest rate swap not designated as cash flow hedge $ 286 $ 418
Total assets at fair value 286 418
Quoted Prices in Active Markets for Identical Assets (Level 1)    
Assets    
Interest rate swap not designated as cash flow hedge 0 0
Total assets at fair value 0 0
Significant Other Observable Inputs (Level 2)    
Assets    
Interest rate swap not designated as cash flow hedge 286 418
Total assets at fair value 286 418
Significant Unobservable Inputs (Level 3)    
Assets    
Interest rate swap not designated as cash flow hedge 0 0
Total assets at fair value $ 0 $ 0