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Marketable Securities (Tables) | 3 Months Ended
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Dec. 31, 2015
Marketable Securities [Abstract] |
Schedule of Marketable Securities | At December 31, 2015 our marketable securities were (in thousands):
| Amortized Cost (1) |  | Unrealized Gains |  | Unrealized Losses |  | Fair Value (1)
Current marketable securities: |  |  |  |  |  |  |
Corporate bonds | $ | 32,844 |  |  | $ | 1 |  |  | $ | (60 | ) |  | $ | 32,785 |
Commercial paper | 7,990 |  |  | — |  |  | (6 | ) |  | 7,984 |
Certificates of deposit | 6,257 |  |  | 1 |  |  | — |  |  | 6,258 |
Government municipal bonds | 3,180 |  |  | — |  |  | (5 | ) |  | 3,175 |
Current marketable securities | 50,271 |  |  | 2 |  |  | (71 | ) |  | 50,202 |
Non-current marketable securities: |  |  |  |  |  |  |
Corporate bonds | 4,051 |  |  | — |  |  | (29 | ) |  | 4,022 |
Certificates of deposit | 7,526 |  |  | — |  |  | (24 | ) |  | 7,502 |
Non-current marketable securities | 11,577 |  |  | — |  |  | (53 | ) |  | 11,524 |
Total marketable securities | $ | 61,848 |  |  | $ | 2 |  |  | $ | (124 | ) |  | $ | 61,726 |
(1) | Included in amortized cost and fair value is purchased and accrued interest of $374.
6. MARKETABLE SECURITIES (CONTINUED) 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 | ) |  | 1,231 |
Current marketable securities | 47,224 |  |  | 8 |  |  | (41 | ) |  | 47,191 |
Non-current marketable securities: |  |  |  |  |  |  |
Corporate bonds | 4,138 |  |  | — |  |  | (12 | ) |  | 4,126 |
Certificates of deposit | 7,511 |  |  | 2 |  |  | (6 | ) |  | 7,507 |
Government municipal bonds | 1,996 |  |  | — |  |  | (3 | ) |  | 1,993 |
Non-current marketable securities | 13,645 |  |  | 2 |  |  | (21 | ) |  | 13,626 |
Total marketable securities | $ | 60,869 |  |  | $ | 10 |  |  | $ | (62 | ) |  | $ | 60,817 |
(1) | Included in amortized cost and fair value is purchased and accrued interest of $252.
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):
| December 31, 2015
| Less than 12 Months |  | More than 12 Months
| Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses
Corporate bonds | $ | 29,496 |  |  | $ | (88 | ) |  | $ | 5,000 |  |  | $ | (1 | )
Commercial paper | 5,985 |  |  | (6 | ) |  | — |  |  | — |
Certificates of deposit | 10,728 |  |  | (22 | ) |  | 498 |  |  | (2 | )
Government municipal bonds | 3,121 |  |  | (5 | ) |  | — |  |  | — |
Total | $ | 49,330 |  |  | $ | (121 | ) |  | $ | 5,498 |  |  | $ | (3 | )
| 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 | )

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