Equity (Schedule of Restricted Stock Activity) (Details) - $ / shares	9 Months Ended
Jun. 30, 2019	Jun. 30, 2018
Restricted Stock Units
Number of Shares
Non-vested, beginning balance (in shares)	1,011,621
Granted (in shares)	600,722
Vested (in shares)	(319,049)
Forfeited (in shares)	(395,115)
Non-vested, ending balance (in shares)	898,179
Weighted Average Grant Date Fair Value
Non-vested, beginning balance (in usd per share)	$ 6.04
Weighted average fair value (in usd per share)	3.88	$ 5.81
Vested (in usd per share)	5.94
Forfeited (in usd per share)	5.21
Non-vested, ending balance (in usd per share)	$ 4.99
Restricted Stock
Number of Shares
Non-vested, beginning balance (in shares)	8,154
Granted (in shares)	0
Vested (in shares)	0
Forfeited (in shares)	0
Non-vested, ending balance (in shares)	8,154
Weighted Average Grant Date Fair Value
Non-vested, beginning balance (in usd per share)	$ 8.20
Weighted average fair value (in usd per share)	0.00
Vested (in usd per share)	0.00
Forfeited (in usd per share)	0.00
Non-vested, ending balance (in usd per share)	$ 8.20
Minimum \| Equity Incentive Plans 2012 and 2010 \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	3 years
Maximum \| Equity Incentive Plans 2012 and 2010 \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	4 years

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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