Summary of Options Outstanding and Options Exercisable (Detail) (USD $)	9 Months Ended
	Mar. 31, 2013	Jun. 30, 2012	Mar. 31, 2012	Jun. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number Outstanding, Options Outstanding	405,004	591,672		320,842
Average Contractual Life, Options Outstanding	6 years 10 months 24 days
Average Exercise Price, Options Outstanding	$ 2.34	$ 2.48	$ 2.67	$ 2.71
Aggregate Intrinsic Value, Options Outstanding	$ 58,350
Number Outstanding, Options Exercisable	274,726
Average Remaining Contractual Life, Options Exercisable	6 years 9 months 18 days
Average Exercise Price, Options Exercisable	$ 2.88
Aggregate Intrinsic Value, Options Exercisable	26,669
Range One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Price, Lower Limit	$ 1.35
Range of Exercise Price, Upper Limit	$ 3.48
Number Outstanding, Options Outstanding	340,000
Average Contractual Life, Options Outstanding	8 years 3 months 18 days
Average Exercise Price, Options Outstanding	$ 1.97
Aggregate Intrinsic Value, Options Outstanding	58,350
Number Outstanding, Options Exercisable	209,722
Average Remaining Contractual Life, Options Exercisable	8 years
Average Exercise Price, Options Exercisable	$ 2.03
Aggregate Intrinsic Value, Options Exercisable	26,669
Range Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Price, Lower Limit	$ 3.49
Range of Exercise Price, Upper Limit	$ 5.62
Number Outstanding, Options Outstanding	50,003
Average Contractual Life, Options Outstanding	3 years
Average Exercise Price, Options Outstanding	$ 4.81
Aggregate Intrinsic Value, Options Outstanding
Number Outstanding, Options Exercisable	50,003
Average Remaining Contractual Life, Options Exercisable	3 years
Average Exercise Price, Options Exercisable	$ 4.81
Aggregate Intrinsic Value, Options Exercisable
Range Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Price, Lower Limit	$ 5.63
Range of Exercise Price, Upper Limit	$ 7.76
Number Outstanding, Options Outstanding	10,001
Average Contractual Life, Options Outstanding	2 years 6 months
Average Exercise Price, Options Outstanding	$ 7.34
Aggregate Intrinsic Value, Options Outstanding
Number Outstanding, Options Exercisable	10,001
Average Remaining Contractual Life, Options Exercisable	2 years 6 months
Average Exercise Price, Options Exercisable	$ 7.34
Aggregate Intrinsic Value, Options Exercisable
Range Four
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Price, Lower Limit	$ 7.77
Range of Exercise Price, Upper Limit	$ 9.90
Number Outstanding, Options Outstanding	5,000
Average Contractual Life, Options Outstanding	2 years 3 months 18 days
Average Exercise Price, Options Outstanding	$ 9.9
Aggregate Intrinsic Value, Options Outstanding
Number Outstanding, Options Exercisable	5,000
Average Remaining Contractual Life, Options Exercisable	2 years 3 months 18 days
Average Exercise Price, Options Exercisable	$ 9.9
Aggregate Intrinsic Value, Options Exercisable