Quarterly report pursuant to Section 13 or 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 $)
 3 Months Ended
Jun. 30, 2014
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]  
Options Outstanding, Number of Shares 2,668,670
Options Exercisable, Number of Shares 397,306
$2.50 - 2.75
  
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 4 months 2 days
Options Exercisable, Number of Shares 60,167
Options Exercisable,Weighted Average Exercise Price $ 2.75
Options Exercisable,Weighted Average Remaining Life (Years) 9 years 3 months 4 days
$2.76 - 2.85
  
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 424,468
Options Outstanding,Weighted Average Exercise Price $ 2.83
Options Outstanding,Weighted Average Remaining Life (Years) 9 years 3 months 4 days
Options Exercisable, Number of Shares 30,558
Options Exercisable,Weighted Average Exercise Price $ 2.83
Options Exercisable,Weighted Average Remaining Life (Years) 9 years 3 months 4 days
$3.85
  
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 1 month 2 days
Options Exercisable, Number of Shares 34,608
Options Exercisable,Weighted Average Exercise Price $ 3.85
Options Exercisable,Weighted Average Remaining Life (Years) 9 years 1 month 2 days
$4.00
  
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]  
Exercise Price $ 4.00
Options Outstanding, Number of Shares 233,135
Options Outstanding,Weighted Average Exercise Price $ 4.00
Options Outstanding,Weighted Average Remaining Life (Years) 8 years 10 months 24 days
Options Exercisable, Number of Shares 78,330
Options Exercisable,Weighted Average Exercise Price $ 4.00
Options Exercisable,Weighted Average Remaining Life (Years) 8 years 10 months 24 days
$4.05 - 4.10
  
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 90,500
Options Outstanding,Weighted Average Exercise Price $ 4.06
Options Outstanding,Weighted Average Remaining Life (Years) 9 years 1 month 10 days
Options Exercisable, Number of Shares 26,977
Options Exercisable,Weighted Average Exercise Price $ 4.06
Options Exercisable,Weighted Average Remaining Life (Years) 8 years 11 months 19 days
$4.23 - 4.5
  
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 585,667
Options Outstanding,Weighted Average Exercise Price $ 4.42
Options Outstanding,Weighted Average Remaining Life (Years) 9 years 1 month 21 days
Options Exercisable, Number of Shares 141,667
Options Exercisable,Weighted Average Exercise Price $ 4.50
Options Exercisable,Weighted Average Remaining Life (Years) 8 years 11 months 12 days
$4.65
  
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 8 months 27 days
Options Exercisable, Number of Shares 25,000
Options Exercisable,Weighted Average Exercise Price $ 4.65
Options Exercisable,Weighted Average Remaining Life (Years) 8 years 8 months 27 days