Computation of Net Loss Per Share - Schedule of Antidilutive Securities Excluded from Computation of Net Loss Per Share (Parenthetical) (Detail)	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Earnings Per Share [Abstract]
Shares awarded to directors that have vested	1,267,215	1,600,564	1,413,481