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Property, Plant, and Equipment - Narrative (Details)
 1 Months Ended 3 Months Ended 12 Months Ended
Mar. 31, 2008
USD ($)
Facility
Sep. 30, 2017
USD ($)
Jun. 30, 2018
USD ($)
Jun. 30, 2017
USD ($)
Jun. 30, 2016
USD ($)
Property, Plant and Equipment [Line Items]          
Net book value     $ 40,845,000 $ 24,123,000  
Impairment charges     0 0 $ 0
Disposed equipment, historical cost   $ 2,122,000      
Depreciation     7,656,000 4,550,000 3,339,000
Sale leaseback transaction, number of properties, in facilities | Facility 2        
Sale leaseback transaction, gross proceeds, manufacturing and office facilities $ 18,250,000        
Sale leaseback transaction, deferred gain, gross 726,000        
Sale leaseback transaction, expenses $ 523,000        
Sale leaseback transaction, lease terms 20 years        
Other liabilities $ 203,000        
Sale leaseback transaction, current period gain recognized     $ 10,000 $ 10,000 $ 10,000
Disposed of          
Property, Plant and Equipment [Line Items]          
Net book value   $ 0