(8) Accounting for Stock-Based Compensation (Detail) - (Table 1) (USD $)	6 Months Ended	12 Months Ended
	Sep. 30, 2013	Mar. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Weighted average exercise price, Balance (in dollars per share)	$ 0.49
Weighted average exercise price, Granted (in dollars per share)
Weighted average exercise price, Exercised (in dollars per share)
Weighted average exercise price, Canceled (in dollars per share)
Weighted average exercise price, Balance (vested and expected to vest) (in dollars per share)	$ 0.49	$ 0.49
Weighted average exercise price, Exercisable at September 30, 2013 (in dollars per share)	$ 0.50
Number of options, Balance	2,525,428
Number of options, Granted
Number of options, Exercised
Number of options, Canceled
Number of options, Balance (vested and expected to vest)	2,525,428	2,525,428
Number of options, Exercisable at September 30, 2013	1,911,572
Weighted average remaining contractual term, Balance (vested and expected to vest)	6 years 6 months 18 days	7 years 18 days
Weighted average remaining contractual term, Exercisable at September 30, 2013	6 years 6 months 29 days
Aggregate intrinsic value, Balance (in dollars)	$ 2,171,868
Aggregate intrinsic value, Balance (vested and expected to vest) (in dollars)	1,666,782	2,171,868
Aggregate intrinsic value, Exercisable at September 30, 2013 (in dollars)	$ 1,242,522