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Stock-Based Compensation - Summary of Activity of Restricted Stock Awards (Details) - Restricted Stock Awards [Member] - $ / shares
12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2016
Number of Shares, Outstanding, Beginning Balance 2,631 5,263  
Number of Shares, Exercised (2,631) (2,632)  
Number of Shares, Outstanding, Ending Balance 0 2,631 5,263
Number of Shares, Expected to vest at June 30, 2018 0    
Weighted Avg Grant Date/Exercise Price Fair Value per Share, Outstanding, Beginning Balance $ 3.80 $ 3.80  
Weighted Avg Grant Date/Exercise Price Fair Value per Share, Exercised (3.8) 0  
Weighted Avg Grant Date/Exercise Price Fair Value per Share, Outstanding, Ending Balance 0 $ 3.80 $ 3.80
Weighted Avg Grant Date/Exercise Price Fair Value per Share, Expected to vest at June 30, 2018 $ 0    
Weighted Avg Contractual Term in Years, Outstanding 0 years 5 months 26 days 1 year 5 months 15 days
Weighted Avg Contractual Term in Years, Exercised 5 months 26 days 0 years  
Weighted Avg Contractual Term in Years, Expected to vest at June 30, 2018 0 years