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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 |  |  |

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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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