(8) Stockholders' Equity (Detail) - (Table 2) (USD $)	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Disclosure Of Compensation Related Costs, Share-Based Payments [Abstract]
Weighted average grant date fair value, unvested (in dollars per share)	$ 1.62	$ 1.96
Weighted average grant date fair value, Awarded (in dollars per share)	$ 0.90	$ 0.71
Weighted average grant date fair value, Vested (in dollars per share)	$ 1.87	$ 2.05
Weighted average grant date fair value, Forfeited (in dollars per share)	$ 0.88	$ 1.21
Weighted average grant date fair value, unvested (in dollars per share)	$ 1.36	$ 1.62
Number of shares, unvested	581,855	500,845
Number of shares, Awarded	160,000	250,500
Number of shares, Vested	(197,739)	(149,490)
Number of shares, Forfeited	(58,500)	(20,000)
Number of shares, unvested	485,616	581,855
Aggregate intrinsic value, unvested (in dollars)	$ 535,307	$ 415,701
Aggregate intrinsic value, unvested (in dollars)	$ 655,582	$ 535,307
Weighted average remaining contractual term, unvested	2 years 7 months 6 days	2 years 7 months 13 days
Weighted average remaining contractual term, unvested	1 year 8 months 12 days	2 years 7 months 6 days