Stock-Based Compensation (Stock Options Outstanding) (Details) (Stock Options, USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number Outstanding	1,063,324	1,059,567	891,293	611,384
Remaining Contractual Life (in years)	7 years 1 month 13 days
Average Exercise Price	$ 7.37	$ 6.71	$ 9.37	$ 10.02
Aggregate Intrinsic Value	$ 4,059
Number Outstanding - Vested and expected to vest	1,058,894
Remaining Contractual Life - Vested and expected to vest	7 years 1 month 10 days
Average Exercise Price - Vested and expected to vest	$ 7.37
Aggregate Intrinsic Value - Vested and expected to vest	4,040
Exercisable at end of period (in shares)	674,237	874,591	400,638
Exercisable at end of period, weighted average exercise price (usd per share)	$ 8.18	$ 7.13	$ 9.25
Aggregate intrinsic value	2,153
2.95-3.00
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number Outstanding	196,574
Remaining Contractual Life (in years)	8 years 2 months 12 days
Average Exercise Price	$ 2.95
Aggregate Intrinsic Value	1,523
Exercisable at end of period (in shares)	85,611
Exercisable at end of period, weighted average exercise price (usd per share)	$ 2.95
Aggregate intrinsic value	663
2.95-3.00 | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Average Exercise Price	$ 3
2.95-3.00 | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Average Exercise Price	$ 2.95
3.01-7.00
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number Outstanding	160,923
Remaining Contractual Life (in years)	4 years 1 month 10 days
Average Exercise Price	$ 5.70
Aggregate Intrinsic Value	805
Exercisable at end of period (in shares)	160,923
Exercisable at end of period, weighted average exercise price (usd per share)	$ 5.70
Aggregate intrinsic value	805
3.01-7.00 | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Average Exercise Price	$ 7
3.01-7.00 | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Average Exercise Price	$ 3.01
7.01-8.00
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number Outstanding	524,292
Remaining Contractual Life (in years)	8 years 2 months 27 days
Average Exercise Price	$ 7.47
Aggregate Intrinsic Value	1,693
Exercisable at end of period (in shares)	251,686
Exercisable at end of period, weighted average exercise price (usd per share)	$ 7.98
Aggregate intrinsic value	685
7.01-8.00 | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Average Exercise Price	$ 8
7.01-8.00 | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Average Exercise Price	$ 7.01
8.01-15.00
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number Outstanding	109,000
Remaining Contractual Life (in years)	4 years 10 months 28 days
Average Exercise Price	$ 10.49
Aggregate Intrinsic Value	38
Exercisable at end of period (in shares)	106,500
Exercisable at end of period, weighted average exercise price (usd per share)	$ 10.49
8.01-15.00 | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Average Exercise Price	$ 15
8.01-15.00 | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Average Exercise Price	$ 8.01
15.01-23.00
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number Outstanding	72,535
Remaining Contractual Life (in years)	6 years 1 month 28 days
Average Exercise Price	$ 17.55
Aggregate Intrinsic Value	0
Exercisable at end of period (in shares)	69,517
Exercisable at end of period, weighted average exercise price (usd per share)	$ 17.56
Aggregate intrinsic value	$ 0
15.01-23.00 | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Average Exercise Price	$ 23
15.01-23.00 | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Average Exercise Price	$ 15.01