(6) Derivative Financial Instruments (Detail) - (Table 1) (USD $)	9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Warrant [Member]
Beginning Balances	$ 3,005,319	$ 2,837,143
Ending Balances	3,058,511	1,824,468
Fair value adjustments	53,192	(1,012,675)
Put Derivative [Member]
Beginning Balances		5,272
Fair value adjustments		(5,272)
Total [Member]
Beginning Balances	3,005,319	2,842,415
Ending Balances	3,058,511	1,824,468
Fair value adjustments	$ 53,192	$ (1,017,947)