Aggregate Stock Option Activity (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2011 Year Month Person Entity
Number of Stock Options
Options outstanding at beginning of year	764,621
Exercised	(1,554)
Forfeited/expired	(392,930)
Options outstanding at end of year	370,137
Vested and unvested expected to vest at end of year	370,137
Options exercisable at end of year	370,137
Options available for future grant	5,266,210
Weighted Average Remaining Contractual Term
Options outstanding at end of year	0.9
Vested and unvested expected to vest at end of year	0.9
Options exercisable at end of year	0.9
Weighted Average Price
Options outstanding at beginning of year	$ 18.94
Exercised	$ 3.62
Forfeited/expired	$ 23.12
Options outstanding at end of year	$ 14.57
Vested and unvested expected to vest at end of year	$ 14.57
Options exercisable at end of year	$ 14.57
Aggregate Intrinsic Value
Options outstanding at end of year	$ 10
Vested and unvested expected to vest at end of year	10
Options exercisable at end of year	$ 10