Fair Value Measurements - Schedule of Assets Measured on a Recurring and Nonrecurring Basis (Details) - USD ($)
$ in Thousands |
3 Months Ended |
|
Dec. 31, 2015 |
Sep. 30, 2016 |
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Impairment of long-lived assets to be disposed of |
$ 9,100
|
|
| Recurring fair value measurements: |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Cash equivalents: |
|
$ 202,700
|
| Short-term investments: |
|
67,293
|
| Recurring fair value measurements: | Money market mutual funds |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Cash equivalents: |
98,223
|
200,355
|
| Recurring fair value measurements: | Corporate bonds |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Cash equivalents: |
|
1,900
|
| Short-term investments: |
|
25,540
|
| Recurring fair value measurements: | U.S. government and agency bonds |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Short-term investments: |
|
29,032
|
| Recurring fair value measurements: | Certificates of deposit |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Cash equivalents: |
|
445
|
| Short-term investments: |
|
12,721
|
| Non-recurring fair value measurements: |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Long-lived assets held and used |
1,788
|
|
| Level 1 | Recurring fair value measurements: |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Cash equivalents: |
|
200,800
|
| Short-term investments: |
|
27,739
|
| Level 1 | Recurring fair value measurements: | Money market mutual funds |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Cash equivalents: |
98,223
|
200,355
|
| Level 1 | Recurring fair value measurements: | Corporate bonds |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Cash equivalents: |
|
0
|
| Short-term investments: |
|
0
|
| Level 1 | Recurring fair value measurements: | U.S. government and agency bonds |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Short-term investments: |
|
15,018
|
| Level 1 | Recurring fair value measurements: | Certificates of deposit |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Cash equivalents: |
|
445
|
| Short-term investments: |
|
12,721
|
| Level 1 | Non-recurring fair value measurements: |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Long-lived assets held and used |
0
|
|
| Level 2 | Recurring fair value measurements: |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Cash equivalents: |
|
1,900
|
| Short-term investments: |
|
39,554
|
| Level 2 | Recurring fair value measurements: | Money market mutual funds |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Cash equivalents: |
0
|
0
|
| Level 2 | Recurring fair value measurements: | Corporate bonds |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Cash equivalents: |
|
1,900
|
| Short-term investments: |
|
25,540
|
| Level 2 | Recurring fair value measurements: | U.S. government and agency bonds |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Short-term investments: |
|
14,014
|
| Level 2 | Recurring fair value measurements: | Certificates of deposit |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Cash equivalents: |
|
0
|
| Short-term investments: |
|
0
|
| Level 2 | Non-recurring fair value measurements: |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Long-lived assets held and used |
0
|
|
| Level 3 | Recurring fair value measurements: |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Cash equivalents: |
|
0
|
| Short-term investments: |
|
0
|
| Level 3 | Recurring fair value measurements: | Money market mutual funds |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Cash equivalents: |
0
|
0
|
| Level 3 | Recurring fair value measurements: | Corporate bonds |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Cash equivalents: |
|
0
|
| Short-term investments: |
|
0
|
| Level 3 | Recurring fair value measurements: | U.S. government and agency bonds |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Short-term investments: |
|
0
|
| Level 3 | Recurring fair value measurements: | Certificates of deposit |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Cash equivalents: |
|
0
|
| Short-term investments: |
|
$ 0
|
| Level 3 | Non-recurring fair value measurements: |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Long-lived assets held and used |
$ 1,788
|
|