Annual report pursuant to Section 13 and 15(d)

Exercise Price for Options Outstanding and Options Exercisable (Detail)

v2.4.0.8
Exercise Price for Options Outstanding and Options Exercisable (Detail) (USD $)
 12 Months Ended
Mar. 31, 2014
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]  
Options Outstanding, Number of Shares 2,748,140
Options Exercisable, Number of Shares 172,029
Exercise Price 1
  
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]  
Range of Exercise Price, lower limit $ 2.50
Range of Exercise Price, upper limit $ 2.75
Options Outstanding, Number of Shares 1,161,000
Options Outstanding,Weighted Average Exercise Price $ 2.60
Options Outstanding,Weighted Average Remaining Life (Years) 9 years 7 months 2 days
Options Exercisable, Number of Shares 60,000
Options Exercisable,Weighted Average Exercise Price $ 2.75
Options Exercisable,Weighted Average Remaining Life (Years) 9 years 6 months 4 days
Exercise Price 2
  
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]  
Range of Exercise Price, lower limit $ 2.76
Range of Exercise Price, upper limit $ 2.85
Options Outstanding, Number of Shares 445,800
Options Outstanding,Weighted Average Exercise Price $ 2.83
Options Outstanding,Weighted Average Remaining Life (Years) 9 years 6 months 4 days
Options Exercisable, Number of Shares 6,758
Options Exercisable,Weighted Average Exercise Price $ 2.83
Options Exercisable,Weighted Average Remaining Life (Years) 9 years 6 months 4 days
Exercise Price 3
  
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]  
Exercise Price $ 3.85
Options Outstanding, Number of Shares 113,900
Options Outstanding,Weighted Average Exercise Price $ 3.85
Options Outstanding,Weighted Average Remaining Life (Years) 9 years 4 months 2 days
Options Exercisable, Number of Shares 25,233
Options Exercisable,Weighted Average Exercise Price $ 3.85
Options Exercisable,Weighted Average Remaining Life (Years) 9 years 4 months 2 days
Exercise Price 4
  
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]  
Exercise Price $ 4.00
Options Outstanding, Number of Shares 236,967
Options Outstanding,Weighted Average Exercise Price $ 4.00
Options Outstanding,Weighted Average Remaining Life (Years) 9 years 1 month 24 days
Options Exercisable, Number of Shares 39,630
Options Exercisable,Weighted Average Exercise Price $ 4.00
Options Exercisable,Weighted Average Remaining Life (Years) 9 years 1 month 24 days
Exercise Price 5
  
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]  
Range of Exercise Price, lower limit $ 4.05
Range of Exercise Price, upper limit $ 4.10
Options Outstanding, Number of Shares 91,473
Options Outstanding,Weighted Average Exercise Price $ 3.80
Options Outstanding,Weighted Average Remaining Life (Years) 9 years 4 months 6 days
Options Exercisable, Number of Shares 20,408
Options Exercisable,Weighted Average Exercise Price $ 4.05
Options Exercisable,Weighted Average Remaining Life (Years) 9 years 2 months 5 days
Exercise Price 6
  
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]  
Range of Exercise Price, lower limit $ 4.23
Range of Exercise Price, upper limit $ 4.50
Options Outstanding, Number of Shares 639,000
Options Outstanding,Weighted Average Exercise Price $ 4.42
Options Outstanding,Weighted Average Remaining Life (Years) 9 years 4 months 28 days
Options Exercisable,Weighted Average Remaining Life (Years) 0 years
Exercise Price 7
  
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]  
Exercise Price $ 4.65
Options Outstanding, Number of Shares 60,000
Options Outstanding,Weighted Average Exercise Price $ 4.65
Options Outstanding,Weighted Average Remaining Life (Years) 8 years 11 months 27 days
Options Exercisable, Number of Shares 20,000
Options Exercisable,Weighted Average Exercise Price $ 4.65
Options Exercisable,Weighted Average Remaining Life (Years) 8 years 11 months 27 days