Annual report pursuant to Section 13 and 15(d)

Summary of Options Granted under 2011 Plan (Detail)

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Summary of Options Granted under 2011 Plan (Detail) (2011 Equity Incentive Plan, USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Mar. 31, 2014
Mar. 31, 2013
2011 Equity Incentive Plan
    
Number of Shares    
Beginning Balance 60,000  
Granted 2,840,000 60,000
Forfeited/Canceled (151,860)  
Exercised      
Ending Balance 2,748,140 60,000
Vested and expected to vest 1,956,157  
Exercisable 172,029  
Weighted Average Exercise Price    
Beginning Balance $ 4.65  
Granted $ 3.33 $ 4.65
Forfeited/Canceled $ 3.96  
Exercised      
Ending Balance $ 3.32 $ 4.65
Vested and expected to vest at March 31, 2014 $ 3.38  
Exercisable, March 31, 2014 $ 3.58  
Weighted Average Remaining Contractual Life    
Outstanding 9 years 5 months 16 days 9 years 11 months 27 days
Vested and expected to vest at March 31, 2014 9 years 5 months 12 days  
Exercisable, March 31, 2014 9 years 3 months 18 days  
Aggregate Intrinsic Value    
Ending Balance $ 2,080  
Vested and expected to vest at March 31, 2014 1,391  
Exercisable, March 31, 2014 $ 82