Equity (Schedule of Stock Options Activity) (Details) (USD $)	3 Months Ended
	Dec. 31, 2013		Dec. 31, 2012
Number of Shares
Outstanding, beginning of period (in shares)	1,745,948
Granted (in shares)	3,875
Exercised (in shares)	(1,301)
Forfeited (in shares)	(4,564)
Expired (in shares)	(37,280)
Outstanding, end of period (in shares)	1,706,678
Exercisable as of December 31, 2013 (in shares)	1,524,835
Weighted Average Exercise Price
Outstanding, beginning of period (in dollars per share)	$ 17.78
Granted (in dollars per share)	$ 5.09
Exercised (in dollars per share)	$ 4.31
Forfeited (in dollars per share)	$ 6.27
Expired (in dollars per share)	$ 20.58
Outstanding, end of period (in dollars per share)	$ 17.73
Exercisable as of December 31, 2013 (in dollars per share)	$ 19.26
Weighted Average Remaining Contractual Life (in years):
Outstanding as of December 31, 2013	4 years 0 months 15 days
Exercisable as of December 31, 2013	3 years 6 months 11 days
Vested and Expected to Vest as of September 30, 2013
Number of stock options	1,675,945
Weighted average exercise price	$ 17.97
Weighted average remaining contractual term	3 years 11 months 12 days
Aggregate Intrinsic Value (in thousands)
Exercised (in shares)	$ 1,000	[1]	$ 1,000	[1]
Exercisable as of December 31, 2013	151,000	[1]
Vested and expected to vest as of September 30, 2013	266,000	[1]
Employee stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options, average minimum vesting period (in years)	4 years
Stock options, average maximum vesting period (in years)	5 years
Stock options, contractual life (in years)	10 years
Unrecognized Stock-based Compensation Expense:
Unrecognized compensation expense	$ 600,000
Unrecognized compensation expense, period for recognition	3 years 1 month 6 days

[1] Intrinsic value for stock options represents the “in-the-money” portion or the positive variance between a stock option's exercise price and the underlying stock price. For the three months ended December 31, 2012, the intrinsic value of options exercised was $1,000.