Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies (Narrative) (Details)

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Commitments and Contingencies (Narrative) (Details)
 12 Months Ended
Jun. 30, 2018
USD ($)
ft²
$ / ft²
Jun. 30, 2017
USD ($)
Operating Leased Assets [Line Items]    
Term of lease (in years) 5 years  
Letters of credit outstanding | $ $ 400,000  
Rent expense | $ $ 1,300,000 $ 800,000
Maximum annual contributions per employee, percent 90.00%  
Employer matching contribution, percent of match, percentage 30.00%  
Employer matching contribution, percent of employees' gross pay, percentage 60.00%  
Employer contribution | $ $ 180,000 $ 81,000
El Segundo, California    
Operating Leased Assets [Line Items]    
Area under lease (in sq feet) | ft² 9,000  
Rent expense (usd per sqft) | $ / ft² 3.71  
Annual increase, percentage 3.00%  
Las Vegas, Nevada    
Operating Leased Assets [Line Items]    
Area under lease (in sq feet) | ft² 17,600  
Rent expense (usd per sqft) | $ / ft² 1.59  
Annual increase, percentage 3.00%  
Los Angeles, California    
Operating Leased Assets [Line Items]    
Area under lease (in sq feet) | ft² 21,500  
Rent expense (usd per sqft) | $ / ft² 2.68  
Annual increase, percentage 3.00%