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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, 2013 | Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number Outstanding | 1,059,567 | 891,293 | 611,384 | 636,283
Remaining Contractual Life (in years) | 7 years 3 months 18 days |  |  |
Average Exercise Price | $ 6.71 | $ 9.37 | $ 10.02 | $ 7.59
Aggregate Intrinsic Value | $ 1,933 |  |  |
Number Outstanding - Vested and expected to vest | 1,057,477 |  |  |
Remaining Contractual Life - Vested and expected to vest | 6 years 8 months 19 days |  |  |
Average Exercise Price - Vested and expected to vest | $ 7.29 |  |  |
Aggregate Intrinsic Value - Vested and expected to vest | 1,925 |  |  |
Exercisable at end of period (in shares) | 874,591 | 400,638 | 232,018 |
Exercisable at end of period, weighted average exercise price (usd per share) | $ 7.13 | $ 9.25 | $ 8.31 |
Aggregate intrinsic value | 1,255 |  |  |
2.95-3.00 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number Outstanding | 305,050 |  |  |
Remaining Contractual Life (in years) | 9 years 2 months 9 days |  |  |
Average Exercise Price | $ 2.95 |  |  |
Aggregate Intrinsic Value | 1,327 |  |  |
Exercisable at end of period (in shares) | 149,087 |  |  |
Exercisable at end of period, weighted average exercise price (usd per share) | $ 2.95 |  |  |
Aggregate intrinsic value | 649 |  |  |
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 | 271,683 |  |  |
Remaining Contractual Life (in years) | 5 years 1 month 24 days |  |  |
Average Exercise Price | $ 5.07 |  |  |
Aggregate Intrinsic Value | 606 |  |  |
Exercisable at end of period (in shares) | 271,683 |  |  |
Exercisable at end of period, weighted average exercise price (usd per share) | $ 5.07 |  |  |
Aggregate intrinsic value | 606 |  |  |
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 | 295,920 |  |  |
Remaining Contractual Life (in years) | 7 years 10 months 24 days |  |  |
Average Exercise Price | $ 7.94 |  |  |
Aggregate Intrinsic Value | 0 |  |  |
Exercisable at end of period (in shares) | 295,920 |  |  |
Exercisable at end of period, weighted average exercise price (usd per share) | $ 7.94 |  |  |
Aggregate intrinsic value | 0 |  |  |
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 | 113,087 |  |  |
Remaining Contractual Life (in years) | 5 years 10 months 24 days |  |  |
Average Exercise Price | $ 10.49 |  |  |
Aggregate Intrinsic Value | 0 |  |  |
Exercisable at end of period (in shares) | 98,775 |  |  |
Exercisable at end of period, weighted average exercise price (usd per share) | $ 10.48 |  |  |
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 | 73,827 |  |  |
Remaining Contractual Life (in years) | 7 years 1 month 6 days |  |  |
Average Exercise Price | $ 17.54 |  |  |
Aggregate Intrinsic Value | 0 |  |  |
Exercisable at end of period (in shares) | 59,126 |  |  |
Exercisable at end of period, weighted average exercise price (usd per share) | $ 17.47 |  |  |
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 Amount of difference between fair value of the underlying shares reserved for issuance and exercise prices of fully vested and expected to vest options outstanding. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph d(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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