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Marketable Securities (Tables) | 6 Months Ended
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Mar. 31, 2014
Marketable Securities [Abstract] |
Schedule of Marketable Securities | At March 31, 2014 our marketable securities were (in thousands):
| Amortized Cost (1) |  | Unrealized Gains |  | Unrealized Losses |  | Fair Value (1)
Current marketable securities: |  |  |  |  |  |  |
Corporate bonds | $ | 36,180 |  |  | $ | 10 |  |  | $ | (24 | ) |  | $ | 36,166 |
Certificates of deposit | 2,752 |  |  | — |  |  | — |  |  | 2,752 |
Government municipal bonds | 6,116 |  |  | 1 |  |  | — |  |  | 6,117 |
Current marketable securities | 45,048 |  |  | 11 |  |  | (24 | ) |  | 45,035 |
Non-current marketable securities: |  |  |  |  |  |  |
Corporate bonds | 2,050 |  |  | — |  |  | (8 | ) |  | 2,042 |
Certificates of deposit | 8,752 |  |  | 15 |  |  | (5 | ) |  | 8,762 |
Non-current marketable securities | 10,802 |  |  | 15 |  |  | (13 | ) |  | 10,804 |
Total marketable securities | $ | 55,850 |  |  | $ | 26 |  |  | $ | (37 | ) |  | $ | 55,839 |
(1) | Included in amortized cost and fair value is purchased and accrued interest of $583.
At September 30, 2013 our marketable securities were (in thousands):
| Amortized Cost (1) |  | Unrealized Gains |  | Unrealized Losses |  | Fair Value (1)
Current marketable securities: |  |  |  |  |  |  |
Corporate bonds | $ | 35,161 |  |  | $ | 10 |  |  | $ | (30 | ) |  | $ | 35,141 |
Certificates of deposit | 1,753 |  |  | — |  |  | (2 | ) |  | 1,751 |
Government municipal bonds | 10,115 |  |  | — |  |  | (1 | ) |  | 10,114 |
Current marketable securities | 47,029 |  |  | 10 |  |  | (33 | ) |  | 47,006 |
Non-current marketable securities: |  |  |  |  |  |  |
Corporate bonds | 6,439 |  |  | — |  |  | (6 | ) |  | 6,433 |
Certificates of deposit | 11,003 |  |  | — |  |  | (47 | ) |  | 10,956 |
Non-current marketable securities | 17,442 |  |  | — |  |  | (53 | ) |  | 17,389 |
Total marketable securities | $ | 64,471 |  |  | $ | 10 |  |  | $ | (86 | ) |  | $ | 64,395 |
(1) | Included in amortized cost and fair value is purchased and accrued interest of $629.
Schedule of Unrealized Losses on Available-For-Sale Securities | The following tables show the fair values and gross unrealized losses of our available-for-sale marketable securities that have been in a continuous unrealized loss position deemed to be temporary, aggregated by investment category (in thousands):
| March 31, 2014
| Less than 12 Months |  | More than 12 Months
| Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses
Corporate bonds | $ | 21,587 |  |  | $ | (24 | ) |  | $ | 10,730 |  |  | $ | (8 | )
Certificates of deposit | 2,998 |  |  | (2 | ) |  | 747 |  |  | (3 | )
Total | $ | 24,585 |  |  | $ | (26 | ) |  | $ | 11,477 |  |  | $ | (11 | )
| September 30, 2013
| Less than 12 Months |  | More than 12 Months
| Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses
Corporate bonds | $ | 29,911 |  |  | $ | (35 | ) |  | $ | 2,001 |  |  | $ | (1 | )
Certificates of deposit | 12,451 |  |  | (49 | ) |  | — |  |  | — |
Government municipal bonds | 6,182 |  |  | (1 | ) |  | — |  |  | — |
Total | $ | 48,544 |  |  | $ | (85 | ) |  | $ | 2,001 |  |  | $ | (1 | )

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- Definition Tabular disclosure of fair value of investments in debt and equity securities in an unrealized loss position categorized neither as held-to-maturity nor trading securities. + References No definition available. + Details
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- Definition Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26626-111562 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.4) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2,12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 + Details
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