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Property and Equipment - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Property Plant And Equipment [Line Items]    
Depreciation and amortization expense $ 749 $ 711
Astral Images, Inc    
Property Plant And Equipment [Line Items]    
Impairment charge of long-lived assets $ 1,600