(7) Accounting for Stock-Based Compensation (Detail) - (Table 1) (USD $)	6 Months Ended
	Sep. 30, 2012
Balance at March 31, 2012 (in Dollars per share)	$ 0.60
Balance at March 31, 2012	2,814,302
Balance at March 31, 2012	8.06
Balance at March 31, 2012 (in Dollars)	$ 1,238,293
Forfeited (in Dollars per share)	$ 0.43
Forfeited	(144,437)
Balance at September 30, 2012 (vested and expected to vest) (in Dollars per share)	$ 0.48
Balance at September 30, 2012 (vested and expected to vest)	2,669,865
Balance at September 30, 2012 (vested and expected to vest)	7.56
Balance at September 30, 2012 (vested and expected to vest) (in Dollars)	1,815,508
Exercisable at September 30, 2012 (in Dollars per share)	$ 2.45
Exercisable at September 30, 2012	70,000
Exercisable at September 30, 2012	4.50
Exercisable at September 30, 2012 (in Dollars)	$ 0