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Fair Value Measurements (Assets and Liabilities Carried at Fair Value Measured on Recurring Basis) (Detail) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2012 | Jun. 30, 2011
--- | --- | ---
Assets: |  |
Cash equivalents | $ 4,292 | $ 8,678
Marketable securities: |  |
Marketable securities | 14,238 | 19,894
Liabilities: |  |
Derivative liabilities |  | 170
Corporate bonds |  |
Marketable securities: |  |
Marketable securities | 5,950 | 7,312
Commercial paper |  |
Marketable securities: |  |
Marketable securities | 3,046 | 2,699
Certificates of deposit |  |
Marketable securities: |  |
Marketable securities | 950 |
U.S. Government obligations |  |
Marketable securities: |  |
Marketable securities |  | 1,205
Quoted prices in active markets (Level 1) |  |
Assets: |  |
Cash equivalents | 4,042 | 8,678
Marketable securities: |  |
Marketable securities | 7,726 | 14,470
Quoted prices in active markets (Level 1) | Corporate bonds |  |
Marketable securities: |  |
Marketable securities | 3,684 | 5,792
Significant other observable inputs (Level 2) |  |
Assets: |  |
Cash equivalents | 250 |
Marketable securities: |  |
Marketable securities | 6,512 | 5,424
Significant other observable inputs (Level 2) | Corporate bonds |  |
Marketable securities: |  |
Marketable securities | 2,266 | 1,520
Significant other observable inputs (Level 2) | Commercial paper |  |
Marketable securities: |  |
Marketable securities | 3,046 | 2,699
Significant other observable inputs (Level 2) | Certificates of deposit |  |
Marketable securities: |  |
Marketable securities | 950 |
Significant other observable inputs (Level 2) | U.S. Government obligations |  |
Marketable securities: |  |
Marketable securities |  | 1,205
Significant unobservable inputs (Level 3) |  |
Liabilities: |  |
Derivative liabilities |  | $ 170

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- Definition This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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- Definition Derivative instrument obligations meeting the definition of a liability which the Company is a party to as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 15 -Paragraph 83 -URI http://asc.fasb.org/extlink&oid=6913464&loc=d3e34841-113949 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 10 -Subparagraph i -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 6 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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