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Business Combination - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Jun. 01, 2014
Mar. 31, 2013
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2013
Schedule of Equity Method Investments [Line Items]          
Percentage of shares issued and outstanding of Galileo purchased   50.00%      
Purchase of Galileo shares     $ 0 $ 0 $ 600
Equity method profit (loss)     0 20 54
Gain on Galileo acquisition     $ 0 290 0
Galileo Global Equity Advisors Inc [Member]          
Schedule of Equity Method Investments [Line Items]          
Percentage of shares issued and outstanding of Galileo purchased   50.00%      
Purchase of Galileo shares   $ 600      
Purchase of additional equity shares 15.00%        
Payments to acquire additional interest in subsidiary $ 180        
Percentage of shares issued and outstanding of Galileo 65.00%        
Gain on Galileo acquisition       161  
Galileo, Additional 15% Purchase [Member]          
Schedule of Equity Method Investments [Line Items]          
Gain on Galileo acquisition $ 129        
Other Income [Member]          
Schedule of Equity Method Investments [Line Items]          
Equity method profit (loss)       $ 20 $ 54