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Income Taxes - Narrative (Details) - USD ($)
 12 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2015
Income Tax Disclosure      
Unrecognized Tax Benefits, Period Increase (Decrease) $ 0 $ 0 $ 0
Federal business tax credits 1,700,000    
Deferred tax assets 83,947,000 90,181,000 90,123,000
Deferred Tax Assets, Net of Valuation Allowance 64,700,000    
Deferred tax asset, valuation allowance (13,000) (83,230,000) (185,000)
Valuation allowance (1,615,000) (1,627,000) (84,857,000)
Valuation allowance increase (decrease)   12,300,000  
Unrecognized tax benefits 0 0  
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued 0 0  
Income tax penalties and interest expense on unrecognized tax benefits   $ 0 $ 0
Internal Revenue Service (IRS)      
Income Tax Disclosure      
Operating loss carryforwards 101,800,000    
State and Local Jurisdiction      
Income Tax Disclosure      
Operating loss carryforwards 97,700,000    
General Business Tax Credit Carryforward      
Income Tax Disclosure      
Federal business tax credits $ 800,000