Balance Sheet Information - Summary of Assets or Liabilities Measured at Fair Value (Detail) - USD ($)
$ in Thousands |
May 31, 2016 |
Feb. 29, 2016 |
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Marketable securities, debt |
$ 37,422
|
|
| Fair value measurements recurring |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Contingent consideration (current) |
1,160
|
$ 1,160
|
| Contingent consideration (non-current) |
161
|
161
|
| Fair value measurements recurring | Money market funds |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Cash equivalents |
56,304
|
58,402
|
| Fair value measurements recurring | Asset-backed securities |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Marketable securities, debt |
4,868
|
4,723
|
| Fair value measurements recurring | Corporate debt securities |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Marketable securities, debt |
20,916
|
19,124
|
| Fair value measurements recurring | Equity securities |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Marketable securities |
2,305
|
3,475
|
| Fair value measurements recurring | Foreign government bonds |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Marketable securities, debt |
201
|
205
|
| Fair value measurements recurring | Mortgage-backed securities |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Marketable securities, debt |
1,808
|
2,328
|
| Fair value measurements recurring | U.S. government agency securities |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Marketable securities, debt |
6,166
|
2,234
|
| Fair value measurements recurring | U.S. government notes |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Marketable securities, debt |
3,463
|
4,305
|
| Fair value measurements recurring | Level 1 | Money market funds |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Cash equivalents |
56,304
|
58,402
|
| Fair value measurements recurring | Level 1 | Equity securities |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Marketable securities |
2,305
|
3,475
|
| Fair value measurements recurring | Level 2 | Asset-backed securities |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Marketable securities, debt |
4,868
|
4,723
|
| Fair value measurements recurring | Level 2 | Corporate debt securities |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Marketable securities, debt |
20,916
|
19,124
|
| Fair value measurements recurring | Level 2 | Foreign government bonds |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Marketable securities, debt |
201
|
205
|
| Fair value measurements recurring | Level 2 | Mortgage-backed securities |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Marketable securities, debt |
1,808
|
2,328
|
| Fair value measurements recurring | Level 2 | U.S. government agency securities |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Marketable securities, debt |
6,166
|
2,234
|
| Fair value measurements recurring | Level 2 | U.S. government notes |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Marketable securities, debt |
3,463
|
4,305
|
| Fair value measurements recurring | Level 3 |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Contingent consideration (current) |
1,160
|
1,160
|
| Contingent consideration (non-current) |
$ 161
|
$ 161
|