Fair Value Measurements (Details) (Fair Value, Measurements, Recurring, USD $) | Sep. 30, 2014 |
In Thousands, unless otherwise specified |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Cash Equivalents | $12,057 |
Available for Sale Securities | 17,993 |
Assets measured at fair value | 30,050 |
Level 1 | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Cash Equivalents | 2,557 |
Available for Sale Securities | 0 |
Assets measured at fair value | 2,557 |
Level 2 | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Cash Equivalents | 9,500 |
Available for Sale Securities | 17,993 |
Assets measured at fair value | 27,493 |
Level 3 | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Cash Equivalents | 0 |
Available for Sale Securities | 0 |
Assets measured at fair value | 0 |
Money market funds | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Cash Equivalents | 2,557 |
Money market funds | Level 1 | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Cash Equivalents | 2,557 |
Money market funds | Level 2 | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Cash Equivalents | 0 |
Money market funds | Level 3 | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Cash Equivalents | 0 |
Commercial paper | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Cash Equivalents | 1,500 |
Available for Sale Securities | 5,000 |
Commercial paper | Level 1 | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Cash Equivalents | 0 |
Available for Sale Securities | 0 |
Commercial paper | Level 2 | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Cash Equivalents | 1,500 |
Available for Sale Securities | 5,000 |
Commercial paper | Level 3 | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Cash Equivalents | 0 |
Available for Sale Securities | 0 |
Variable-rate demand notes | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Cash Equivalents | 8,000 |
Variable-rate demand notes | Level 1 | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Cash Equivalents | 0 |
Variable-rate demand notes | Level 2 | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Cash Equivalents | 8,000 |
Variable-rate demand notes | Level 3 | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Cash Equivalents | 0 |
Certificates of deposit | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Available for Sale Securities | 5,147 |
Certificates of deposit | Level 1 | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Available for Sale Securities | 0 |
Certificates of deposit | Level 2 | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Available for Sale Securities | 5,147 |
Certificates of deposit | Level 3 | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Available for Sale Securities | 0 |
Corporate bonds | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Available for Sale Securities | 7,846 |
Corporate bonds | Level 1 | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Available for Sale Securities | 0 |
Corporate bonds | Level 2 | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Available for Sale Securities | 7,846 |
Corporate bonds | Level 3 | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Available for Sale Securities | $0 |