Warrants (Detail)	6 Months Ended
	Sep. 30, 2015 $ / shares shares
Class of Warrant or Right [Line Items]
Warrants outstanding	914,500
Weighted average remaining contractual life	3 years 9 months 18 days
Warrants exercisable	414,500
Weighted average exercise price per share | $ / shares	$ 4.60
Warrant Exercise Price Range One 1.15
Class of Warrant or Right [Line Items]
Exercise Price Per Share | $ / shares	$ 1.15
Warrants outstanding	125,000
Weighted average remaining contractual life	9 months 18 days
Warrants exercisable	125,000
Weighted average exercise price per share | $ / shares	$ 1.15
Warrant Exercise Price Range Two 1.15
Class of Warrant or Right [Line Items]
Exercise Price Per Share | $ / shares	$ 1.15
Warrants outstanding	25,000
Weighted average remaining contractual life	9 months 18 days
Warrants exercisable	25,000
Weighted average exercise price per share | $ / shares	$ 1.15
Warrant Exercise Price Range Three 4.50
Class of Warrant or Right [Line Items]
Exercise Price Per Share | $ / shares	$ 4.50
Warrants outstanding	50,000
Weighted average remaining contractual life	9 months 18 days
Warrants exercisable	50,000
Weighted average exercise price per share | $ / shares	$ 4.50
Warrant Exercise Price Range Four 5.00
Class of Warrant or Right [Line Items]
Exercise Price Per Share | $ / shares	$ 5.00
Warrants outstanding	10,000
Weighted average remaining contractual life	2 years 1 month 6 days
Warrants exercisable	10,000
Weighted average exercise price per share | $ / shares	$ 5.00
Warrant Exercise Price Range Five 4.50
Class of Warrant or Right [Line Items]
Exercise Price Per Share | $ / shares	$ 4.50
Warrants outstanding	82,500
Weighted average remaining contractual life	2 years 3 months 18 days
Warrants exercisable	82,500
Weighted average exercise price per share | $ / shares	$ 4.50
Warrant Exercise Price Range Six 4.00
Class of Warrant or Right [Line Items]
Exercise Price Per Share | $ / shares	$ 4.00
Warrants outstanding	22,000
Weighted average remaining contractual life	2 years 3 months 18 days
Warrants exercisable	22,000
Weighted average exercise price per share | $ / shares	$ 4.00
Warrant Exercise Price Range Seven 10.00
Class of Warrant or Right [Line Items]
Exercise Price Per Share | $ / shares	$ 10.00
Warrants outstanding	200,000
Weighted average remaining contractual life	5 years 6 months
Warrants exercisable	0
Weighted average exercise price per share | $ / shares	$ 10.00
Warrant Exercise Price Range Eight 20.00
Class of Warrant or Right [Line Items]
Exercise Price Per Share | $ / shares	$ 20.00
Warrants outstanding	200,000
Weighted average remaining contractual life	5 years 6 months
Warrants exercisable	0
Weighted average exercise price per share | $ / shares	$ 20.00
Warrant Exercise Price Range Nine 10.00
Class of Warrant or Right [Line Items]
Exercise Price Per Share | $ / shares	$ 10.00
Warrants outstanding	100,000
Weighted average remaining contractual life	5 years 6 months
Warrants exercisable	0
Weighted average exercise price per share | $ / shares	$ 10.00
Warrant Exercise Price Range Ten 10.00
Class of Warrant or Right [Line Items]
Exercise Price Per Share | $ / shares	$ 10.00
Warrants outstanding	100,000
Weighted average remaining contractual life	2 years 9 months 18 days
Warrants exercisable	100,000
Weighted average exercise price per share | $ / shares	$ 10.00