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Warrants (Detail) - $ / shares
 3 Months Ended
Jun. 30, 2016
Oct. 14, 2015
Class of Warrant or Right [Line Items]    
Exercise Price Per Share $ 1.15 $ 9.00
Warrant Exercise Price Range One 1.15    
Class of Warrant or Right [Line Items]    
Exercise Price Per Share $ 1.15  
Warrants outstanding 35,000  
Weighted average remaining contractual life 29 days  
Warrants exercisable 35,000  
Weighted average exercise price per share $ 1.15  
Warrant Exercise Price Range Two 4.00 - 5.00    
Class of Warrant or Right [Line Items]    
Warrants outstanding 164,500  
Weighted average remaining contractual life 1 year 1 month 10 days  
Warrants exercisable 164,500  
Weighted average exercise price per share $ 4.46  
Warrant Exercise Price Range Two 4.00 - 5.00 | Maximum [Member]    
Class of Warrant or Right [Line Items]    
Exercise Price Per Share 5.00  
Warrant Exercise Price Range Two 4.00 - 5.00 | Minimum [Member]    
Class of Warrant or Right [Line Items]    
Exercise Price Per Share $ 4.00  
Warrant Exercise Price Range Three 9.00 - 10.00    
Class of Warrant or Right [Line Items]    
Warrants outstanding 1,776,666  
Weighted average remaining contractual life 4 years 3 months 18 days  
Warrants exercisable 1,776,666  
Weighted average exercise price per share $ 9.37  
Warrant Exercise Price Range Three 9.00 - 10.00 | Maximum [Member]    
Class of Warrant or Right [Line Items]    
Exercise Price Per Share 10.00  
Warrant Exercise Price Range Three 9.00 - 10.00 | Minimum [Member]    
Class of Warrant or Right [Line Items]    
Exercise Price Per Share $ 9.00  
Warrant Exercise Price Range Four 1.15 - 10.00    
Class of Warrant or Right [Line Items]    
Warrants outstanding 1,976,166  
Weighted average remaining contractual life 3 years 11 months 16 days  
Warrants exercisable 1,976,166  
Weighted average exercise price per share $ 8.82  
Warrant Exercise Price Range Four 1.15 - 10.00 | Maximum [Member]    
Class of Warrant or Right [Line Items]    
Exercise Price Per Share 10.00  
Warrant Exercise Price Range Four 1.15 - 10.00 | Minimum [Member]    
Class of Warrant or Right [Line Items]    
Exercise Price Per Share $ 1.15