Stock Compensation - Additional Information Relating to Options Outstanding (Detail) (USD $)	6 Months Ended
	Dec. 31, 2012	Jun. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Price, Minimum	$ 3.60
Range of Exercise Price, Maximum	$ 8.95
Options Outstanding, Number of options	1,619,050	2,018,476
Options Exercisable, Number of options	1,198,675
Range of Exercise Price 1 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Price, Minimum	$ 3.60
Range of Exercise Price, Maximum	$ 4.00
Options Outstanding, Number of options	439,250	669,875
Options Exercisable, Number of options	418,625
Range of Exercise Price 2 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Price, Minimum	$ 4.03
Range of Exercise Price, Maximum	$ 6.00
Options Outstanding, Number of options	618,550	831,100
Options Exercisable, Number of options	478,550
Range of Exercise Price 3 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Price, Minimum	$ 6.01
Range of Exercise Price, Maximum	$ 8.95
Options Outstanding, Number of options	561,250	517,501
Options Exercisable, Number of options	301,500