Information Related to Stock Options (Detail) - Jun. 30, 2015 - $ / shares | Total |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] | |
Options Outstanding, Outstanding Number of Options | 789,200 |
Options Exercisable, Weighted Average Remaining Life In Years | 7 years 2 months 12 days |
Options Exercisable, Exercisable Number of Options | 365,327 |
Exercise Price 1 | |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] | |
Options Outstanding, Exercise Price | $ 5.70 |
Options Outstanding, Outstanding Number of Options | 35,000 |
Options Exercisable, Weighted Average Remaining Life In Years | 9 years |
Options Exercisable, Exercisable Number of Options | 15,000 |
Exercise Price 2 | |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] | |
Options Outstanding, Exercise Price | $ 6.40 |
Options Outstanding, Outstanding Number of Options | 25,000 |
Options Exercisable, Weighted Average Remaining Life In Years | |
Options Exercisable, Exercisable Number of Options | 0 |
Exercise Price 3 | |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] | |
Options Outstanding, Exercise Price | $ 6.60 |
Options Outstanding, Outstanding Number of Options | 281,250 |
Options Exercisable, Weighted Average Remaining Life In Years | 4 years 2 months 12 days |
Options Exercisable, Exercisable Number of Options | 3,750 |
Exercise Price 4 | |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] | |
Options Outstanding, Exercise Price | $ 6.80 |
Options Outstanding, Outstanding Number of Options | 12,500 |
Options Exercisable, Weighted Average Remaining Life In Years | |
Options Exercisable, Exercisable Number of Options | 0 |
Exercise Price 5 | |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] | |
Options Outstanding, Exercise Price | $ 7.80 |
Options Outstanding, Outstanding Number of Options | 3,000 |
Options Exercisable, Weighted Average Remaining Life In Years | 4 years |
Options Exercisable, Exercisable Number of Options | 3,000 |
Exercise Price 6 | |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] | |
Options Outstanding, Exercise Price | $ 8 |
Options Outstanding, Outstanding Number of Options | 15,000 |
Options Exercisable, Weighted Average Remaining Life In Years | |
Options Exercisable, Exercisable Number of Options | 0 |
Exercise Price 7 | |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] | |
Options Outstanding, Exercise Price | $ 9.20 |
Options Outstanding, Outstanding Number of Options | 25,000 |
Options Exercisable, Weighted Average Remaining Life In Years | |
Options Exercisable, Exercisable Number of Options | 0 |
Exercise Price 8 | |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] | |
Options Outstanding, Exercise Price | $ 9.40 |
Options Outstanding, Outstanding Number of Options | 5,000 |
Options Exercisable, Weighted Average Remaining Life In Years | 4 years 7 months 6 days |
Options Exercisable, Exercisable Number of Options | 4,375 |
Exercise Price 9 | |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] | |
Options Outstanding, Exercise Price | $ 10 |
Options Outstanding, Outstanding Number of Options | 17,250 |
Options Exercisable, Weighted Average Remaining Life In Years | 4 years 4 months 24 days |
Options Exercisable, Exercisable Number of Options | 17,250 |
Exercise price 10 | |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] | |
Options Outstanding, Exercise Price | $ 10.60 |
Options Outstanding, Outstanding Number of Options | 2,000 |
Options Exercisable, Weighted Average Remaining Life In Years | 8 years 8 months 12 days |
Options Exercisable, Exercisable Number of Options | 2,000 |
Exercise Price 11 | |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] | |
Options Outstanding, Exercise Price | $ 12 |
Options Outstanding, Outstanding Number of Options | 49,000 |
Options Exercisable, Weighted Average Remaining Life In Years | 8 years 3 months 18 days |
Options Exercisable, Exercisable Number of Options | 49,000 |
Exercise Price 12 | |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] | |
Options Outstanding, Exercise Price | $ 13 |
Options Outstanding, Outstanding Number of Options | 133,750 |
Options Exercisable, Weighted Average Remaining Life In Years | 8 years 3 months 18 days |
Options Exercisable, Exercisable Number of Options | 92,502 |
Exercise Price 13 | |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] | |
Options Outstanding, Exercise Price | $ 20 |
Options Outstanding, Outstanding Number of Options | 6,550 |
Options Exercisable, Weighted Average Remaining Life In Years | 7 years 6 months |
Options Exercisable, Exercisable Number of Options | 6,550 |
Exercise Price 14 | |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] | |
Options Outstanding, Exercise Price | $ 21 |
Options Outstanding, Outstanding Number of Options | 113,500 |
Options Exercisable, Weighted Average Remaining Life In Years | 6 years 7 months 6 days |
Options Exercisable, Exercisable Number of Options | 113,500 |
Exercise Price 15 | |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] | |
Options Outstanding, Exercise Price | $ 22 |
Options Outstanding, Outstanding Number of Options | 250 |
Options Exercisable, Weighted Average Remaining Life In Years | 2 years |
Options Exercisable, Exercisable Number of Options | 250 |
Exercise price 16 | |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] | |
Options Outstanding, Exercise Price | $ 24 |
Options Outstanding, Outstanding Number of Options | 500 |
Options Exercisable, Weighted Average Remaining Life In Years | 10 months 24 days |
Options Exercisable, Exercisable Number of Options | 500 |
Exercise Price 17 | |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] | |
Options Outstanding, Exercise Price | $ 25 |
Options Outstanding, Outstanding Number of Options | 2,150 |
Options Exercisable, Weighted Average Remaining Life In Years | 1 year 4 months 24 days |
Options Exercisable, Exercisable Number of Options | 2,150 |
Exercise Price 18 | |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] | |
Options Outstanding, Exercise Price | $ 28 |
Options Outstanding, Outstanding Number of Options | 17,500 |
Options Exercisable, Weighted Average Remaining Life In Years | 4 years 1 month 6 days |
Options Exercisable, Exercisable Number of Options | 10,500 |
Exercise Price 19 | |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] | |
Options Outstanding, Exercise Price | $ 30 |
Options Outstanding, Outstanding Number of Options | 45,000 |
Options Exercisable, Weighted Average Remaining Life In Years | 7 years 4 months 24 days |
Options Exercisable, Exercisable Number of Options | 45,000 |