Quarterly report pursuant to Section 13 or 15(d)

Stock Option and Incentive Plans - Summary of Stock Option Activity (Detail)

v3.2.0.727
Stock Option and Incentive Plans - Summary of Stock Option Activity (Detail) - Jun. 30, 2015 - USD ($)
Total
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Number of Options, Options outstanding, Beginning balance 3,089,327
Number of Options, Granted 1,100,050
Number of Options, Exercised (75,197)
Number of Options, Forfeited (37,858)
Number of Options, Options outstanding, Ending balance 4,076,322
Number of Options, Vested and exercisable, Ending Balance 2,620,985
Weighted Average Exercise Price, Options outstanding, Beginning balance $ 4.95
Weighted Average Exercise Price, Granted 4.75
Weighted Average Exercise Price, Exercised 3.50
Weighted Average Exercise Price, Forfeited 3.61
Weighted Average Exercise Price, Options outstanding, Ending balance 4.93
Weighted Average Exercise Price, Vested and exercisable, Ending balance $ 5.14
Weighted Average Remaining Contractual Life (in years), Options outstanding 7 years 8 months 16 days
Weighted Average Remaining Contractual Life (in years), Vested and exercisable 6 years 9 months 11 days
Aggregate Intrinsic value, Options outstanding $ 3,854,130
Aggregate Intrinsic value, Vested and exercisable $ 2,815,048