Stock Options (Detail) (USD $)	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
Employee Stock Option Plan 2002 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding, beginning of period	1,380,140		1,380,140
Exercised	729,000
Outstanding, end of period	651,140	1,380,140
Exercisable, end of period	651,140	1,380,140
Total intrinsic value of options exercised	$ 1,301,000
Total intrinsic value of options outstanding	853,867	1,066,760
Total intrinsic value of options exercisable	$ 853,867	$ 1,066,760
Outstanding, beginning of period, weighted average exercise price	$ 2.95		$ 2.95
Exercised, weighted average exercise price	$ 1.85
Outstanding, end of period, weighted average exercise price	$ 4.18		$ 2.95
Exercisable, end of period, weighted average exercise price	$ 4.18	$ 2.95
Stock Option Plan 2000 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding, beginning of period		30,000	30,000
Outstanding, end of period	30,000	30,000
Exercisable, end of period	30,000	30,000
Outstanding, beginning of period, weighted average exercise price		$ 5.03	$ 5.03
Outstanding, end of period, weighted average exercise price	$ 5.03	$ 5.03	$ 5.03
Exercisable, end of period, weighted average exercise price	$ 5.03	$ 5.03