Stock Options (Detail) (USD $)	3 Months Ended	9 Months Ended
	Mar. 31, 2013 Employee Stock Option Plan 2002 [Member]	Mar. 31, 2013 Employee Stock Option Plan 2002 [Member]	Mar. 31, 2012 Employee Stock Option Plan 2002 [Member]	Jun. 30, 2011 Employee Stock Option Plan 2002 [Member]	Mar. 31, 2013 Stock Option Plan 2000 [Member]	Jun. 30, 2012 Stock Option Plan 2000 [Member]	Mar. 31, 2012 Stock Option Plan 2000 [Member]	Jun. 30, 2011 Stock Option Plan 2000 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding, beginning of period		1,380,140		1,380,140		30,000		30,000
Exercised	0	729,000
Outstanding, end of period	651,140	651,140	1,380,140		30,000		30,000
Exercisable, end of period	651,140	651,140	1,380,140		30,000		30,000
Total intrinsic value of options exercised		$ 1,301,000
Total intrinsic value of options outstanding	578,000	578,000	1,259,000
Total intrinsic value of options exercisable	$ 578,000	$ 578,000	$ 1,259,000
Outstanding, beginning of period, weighted average exercise price		$ 2.95	$ 2.95	$ 2.95	$ 5.03	$ 5.03	$ 5.03	$ 5.03
Exercised, weighted average exercise price		$ 1.85
Outstanding, end of period, weighted average exercise price	$ 4.18	$ 4.18	$ 2.95	$ 2.95	$ 5.03	$ 5.03	$ 5.03	$ 5.03
Exercisable, end of period, weighted average exercise price	$ 4.18	$ 4.18	$ 2.95		$ 5.03		$ 5.03