Stock Compensation - Additional Information Relating to Options Outstanding (Detail) (USD $)	3 Months Ended
	Sep. 30, 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	$ 8.29
Options outstanding, Number of options	1,874,551	2,018,476
Options Exercisable, Number of options	1,473,926
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	625,000	669,875
Options Exercisable, Number of options	604,938
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	729,300	831,100
Options Exercisable, Number of options	585,675
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	$ 8.29
Options outstanding, Number of options	520,251	517,501
Options Exercisable, Number of options	283,313