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Marketable Securities (Tables) | 12 Months Ended
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Sep. 30, 2015
Marketable Securities [Abstract] |
Schedule of Marketable Securities | At September 30, 2015 our marketable securities were (in thousands):
| Amortized Cost (1) |  | Unrealized Gains |  | Unrealized Losses |  | Fair Value (1)
Current marketable securities: |  |  |  |  |  |  |
Corporate bonds | $ | 31,753 |  |  | $ | — |  |  | $ | (39 | ) |  | $ | 31,714 |
Commercial paper | 7,986 |  |  | — |  |  | (1 | ) |  | 7,985 |
Certificates of deposit | 6,253 |  |  | 8 |  |  | — |  |  | 6,261 |
Government municipal bonds | 1,232 |  |  | — |  |  | — |  |  | 1,232 |
Current marketable securities | 47,224 |  |  | 8 |  |  | (40 | ) |  | 47,192 |
Non-current marketable securities: |  |  |  |  |  |  |
Corporate bonds | 4,138 |  |  | — |  |  | (13 | ) |  | 4,125 |
Certificates of deposit | 7,511 |  |  | 3 |  |  | (7 | ) |  | 7,507 |
Government municipal bonds | 1,996 |  |  | — |  |  | (3 | ) |  | 1,993 |
Non-current marketable securities | 13,645 |  |  | 3 |  |  | (23 | ) |  | 13,625 |
Total marketable securities | $ | 60,869 |  |  | $ | 11 |  |  | $ | (63 | ) |  | $ | 60,817 |
(1) | Included in amortized cost and fair value is purchased and accrued interest of $252.
At September 30, 2014 our marketable securities were (in thousands):
| Amortized Cost (1) |  | Unrealized Gains |  | Unrealized Losses |  | Fair Value (1)
Current marketable securities: |  |  |  |  |  |  |
Corporate bonds | $ | 24,668 |  |  | $ | 1 |  |  | $ | (22 | ) |  | $ | 24,647 |
Commercial paper | 3,998 |  |  | — |  |  | (1 | ) |  | 3,997 |
Certificates of deposit | 4,252 |  |  | 2 |  |  | — |  |  | 4,254 |
Current marketable securities | 32,918 |  |  | 3 |  |  | (23 | ) |  | 32,898 |
Non-current marketable securities: |  |  |  |  |  |  |
Corporate bonds | 2,051 |  |  | — |  |  | (4 | ) |  | 2,047 |
Certificates of deposit | 9,502 |  |  | 14 |  |  | (22 | ) |  | 9,494 |
Non-current marketable securities | 11,553 |  |  | 14 |  |  | (26 | ) |  | 11,541 |
Total marketable securities | $ | 44,471 |  |  | $ | 17 |  |  | $ | (49 | ) |  | $ | 44,439 |
(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 securities that have been in a continuous unrealized loss position deemed to be temporary, aggregated by investment category (in thousands):
| September 30, 2015
| Less than 12 Months |  | More than 12 Months
| Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses
Corporate bonds | $ | 33,664 |  |  | $ | (52 | ) |  | $ | — |  |  | $ | — |
Commercial paper | 5,987 |  |  | (1 | ) |  | — |  |  | — |
Certificates of deposit | 4,244 |  |  | (6 | ) |  | 499 |  |  | (1 | )
Government municipal bonds | 3,159 |  |  | (3 | ) |  | — |  |  | — |
Total | $ | 47,054 |  |  | $ | (62 | ) |  | $ | 499 |  |  | $ | (1 | )
| September 30, 2014
| Less than 12 Months |  | More than 12 Months
| Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses
Corporate bonds | $ | 23,475 |  |  | $ | (26 | ) |  | $ | — |  |  | $ | — |
Commercial paper | 3,998 |  |  | (1 | ) |  | — |  |  | — |
Certificates of deposit | 2,980 |  |  | (20 | ) |  | 748 |  |  | (2 | )
Total | $ | 30,453 |  |  | $ | (47 | ) |  | $ | 748 |  |  | $ | (2 | )

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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 2 -URI http://asc.fasb.org/extlink&oid=49167202&loc=d3e26626-111562 Reference 2: 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 3: 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 4: 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=49167202&loc=d3e26610-111562 Reference 5: 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 Reference 6: 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 + Details
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