Exercise Prices and Weighted-average Remaining Contractual Lives for Options Outstanding (Detail) (USD $)	12 Months Ended
	Jun. 30, 2013
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding	635,094
Weighted Average Remaining Contractual Life (Years)	4 years 1 month 6 days
Options Exercisable	145,596
Weighted Average Exercise Price of Options Exercisable	$ 10.83
Range One
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding	833
Exercise Price	$ 37.80
Weighted Average Remaining Contractual Life (Years)	7 months 6 days
Options Exercisable	833
Weighted Average Exercise Price of Options Exercisable	$ 37.80
Range Two
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding	18,365
Exercise Price	$ 30.30
Weighted Average Remaining Contractual Life (Years)	1 year 9 months 18 days
Options Exercisable	14,549
Weighted Average Exercise Price of Options Exercisable	$ 30.30
Range Three
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding	18,365
Exercise Price	$ 11.16
Weighted Average Remaining Contractual Life (Years)	1 year 9 months 18 days
Options Exercisable	14,549
Weighted Average Exercise Price of Options Exercisable	$ 11.16
Range Four
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding	12,243
Exercise Price	$ 9.12
Weighted Average Remaining Contractual Life (Years)	2 years
Options Exercisable	9,181
Weighted Average Exercise Price of Options Exercisable	$ 9.12
Range Five
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding	13,705
Exercise Price	$ 4.62
Weighted Average Remaining Contractual Life (Years)	2 years 2 months 12 days
Options Exercisable	9,433
Weighted Average Exercise Price of Options Exercisable	$ 4.62
Range Six
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding	6,250
Exercise Price	$ 6.90
Weighted Average Remaining Contractual Life (Years)	2 years 3 months 18 days
Options Exercisable	4,033
Weighted Average Exercise Price of Options Exercisable	$ 6.90
Range Seven
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding	29,603
Exercise Price	$ 7.68
Weighted Average Remaining Contractual Life (Years)	2 years 10 months 24 days
Options Exercisable	14,805
Weighted Average Exercise Price of Options Exercisable	$ 7.68
Range Eight
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding	23,083
Exercise Price	$ 11.40
Weighted Average Remaining Contractual Life (Years)	3 years 1 month 6 days
Options Exercisable	10,581
Weighted Average Exercise Price of Options Exercisable	$ 11.40
Range Nine
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding	332
Exercise Price	$ 9.18
Weighted Average Remaining Contractual Life (Years)	3 years 2 months 12 days
Options Exercisable	146
Weighted Average Exercise Price of Options Exercisable	$ 9.18
Range Ten
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding	16,776
Exercise Price	$ 8.04
Weighted Average Remaining Contractual Life (Years)	3 years 3 months 18 days
Options Exercisable	9,280
Weighted Average Exercise Price of Options Exercisable	$ 8.04
Range Eleven
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding	4,194
Exercise Price	$ 8.04
Weighted Average Remaining Contractual Life (Years)	2 years 8 months 12 days
Options Exercisable	4,194
Weighted Average Exercise Price of Options Exercisable	$ 8.04
Range Twelve
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding	177
Exercise Price	$ 3.66
Weighted Average Remaining Contractual Life (Years)	3 years 10 months 24 days
Options Exercisable	44
Weighted Average Exercise Price of Options Exercisable	$ 3.66
Range Thirteen
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding	5,401
Exercise Price	$ 2.82
Weighted Average Remaining Contractual Life (Years)	4 years
Range Fourteen
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding	67,892
Exercise Price	$ 2.76
Weighted Average Remaining Contractual Life (Years)	4 years 1 month 6 days
Range Fifteen
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding	15,872
Exercise Price	$ 4.26
Weighted Average Remaining Contractual Life (Years)	4 years 2 months 12 days
Range Sixteen
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding	3,968
Exercise Price	$ 4.26
Weighted Average Remaining Contractual Life (Years)	2 years 8 months 12 days
Options Exercisable	3,968
Weighted Average Exercise Price of Options Exercisable	$ 4.26
Range Seventeen
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding	50,000
Exercise Price	$ 8.52
Weighted Average Remaining Contractual Life (Years)	4 years 4 months 24 days
Options Exercisable	50,000
Weighted Average Exercise Price of Options Exercisable	$ 8.52
Range Eighteen
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding	5,000
Exercise Price	$ 7.05
Weighted Average Remaining Contractual Life (Years)	4 years 6 months
Range Nineteen
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding	6,319
Exercise Price	$ 5.19
Weighted Average Remaining Contractual Life (Years)	4 years 7 months 6 days
Range Twenty
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding	2,500
Exercise Price	$ 8.23
Weighted Average Remaining Contractual Life (Years)	4 years 8 months 12 days
Range Twenty One
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding	194,153
Exercise Price	$ 8.63
Weighted Average Remaining Contractual Life (Years)	4 years 8 months 12 days
Range Twenty Two
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding	51,000
Exercise Price	$ 8.74
Weighted Average Remaining Contractual Life (Years)	4 years 9 months 18 days
Range Twenty Three
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding	4,063
Exercise Price	$ 8.09
Weighted Average Remaining Contractual Life (Years)	4 years 10 months 24 days
Range Twenty Four
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding	85,000
Exercise Price	$ 7.25
Weighted Average Remaining Contractual Life (Years)	5 years