Shareholder's Equity - Number of Stock Options Outstanding and Exercisable (Detail) (USD $)	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Schedule Of Stock Option Activity [Line Items]
Exercise Prices	$ 1.92	$ 2.62	$ 5.80	$ 5.19
Number Outstanding	617,499	400,499	174,249	393,624
Weighted-Average Remaining Contractual Life (in years)	3 years 4 months 6 days
Number Exercisable	404,163	220,498	168,909
Range One [Member]
Schedule Of Stock Option Activity [Line Items]
Exercise Prices	$ 1.22
Number Outstanding	260,000
Weighted-Average Remaining Contractual Life (in years)	16 years 5 months 9 days
Number Exercisable	140,000
Range Two [Member]
Schedule Of Stock Option Activity [Line Items]
Exercise Prices	$ 1.67
Number Outstanding	70,000
Weighted-Average Remaining Contractual Life (in years)	7 years 2 months 1 day
Number Exercisable	70,000
Range Three [Member]
Schedule Of Stock Option Activity [Line Items]
Exercise Prices	$ 2.09
Number Outstanding	140,000
Weighted-Average Remaining Contractual Life (in years)	8 years 2 months 16 days
Number Exercisable	46,665
Range Four [Member]
Schedule Of Stock Option Activity [Line Items]
Exercise Prices	$ 2.51
Number Outstanding	10,000
Weighted-Average Remaining Contractual Life (in years)	5 years 2 months 23 days
Number Exercisable	9,999
Range Five [Member]
Schedule Of Stock Option Activity [Line Items]
Exercise Prices	$ 2.90
Number Outstanding	37,500
Weighted-Average Remaining Contractual Life (in years)	5 months 9 days
Number Exercisable	37,500
Range Six [Member]
Schedule Of Stock Option Activity [Line Items]
Exercise Prices	$ 6.55
Number Outstanding	33,000
Weighted-Average Remaining Contractual Life (in years)	3 years 10 months 17 days
Number Exercisable	33,000
Range Seven [Member]
Schedule Of Stock Option Activity [Line Items]
Exercise Prices	$ 8.00
Number Outstanding	33,999
Weighted-Average Remaining Contractual Life (in years)	4 years 2 months 27 days
Number Exercisable	33,999
Range Eight [Member]
Schedule Of Stock Option Activity [Line Items]
Exercise Prices	$ 9.63
Number Outstanding	33,000
Weighted-Average Remaining Contractual Life (in years)	2 years 4 months 10 days
Number Exercisable	33,000