Fair Value Measurements (Details) (Fair Value, Measurements, Recurring [Member], USD $) | Mar. 31, 2014 |
In Thousands, unless otherwise specified |
Level 1 | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Available for Sale Securities | $0 |
Assets measured at fair value | 27,975 |
Level 2 | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Available for Sale Securities | 13,518 |
Assets measured at fair value | 13,518 |
Level 3 | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Available for Sale Securities | 0 |
Assets measured at fair value | 0 |
Total | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Available for Sale Securities | 13,518 |
Assets measured at fair value | 41,493 |
Money market funds | Level 1 | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Cash Equivalents | 27,975 |
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 |
Money market funds | Total | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Cash Equivalents | 27,975 |
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 | 5,352 |
Corporate bonds | Level 3 | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Available for Sale Securities | 0 |
Corporate bonds | Total | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Available for Sale Securities | 5,352 |
Commercial paper | Level 1 | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Available for Sale Securities | 0 |
Commercial paper | Level 2 | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Available for Sale Securities | 4,495 |
Commercial paper | Level 3 | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Available for Sale Securities | 0 |
Commercial paper | Total | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Available for Sale Securities | 4,495 |
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 | 3,671 |
Certificates of deposit | Level 3 | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Available for Sale Securities | 0 |
Certificates of deposit | Total | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Available for Sale Securities | $3,671 |