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Balance Sheet Accounts (Schedule of Available-for-sale Securities) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Jun. 30, 2013
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Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | $ 61,509 | $ 164,363
Fair Value | 61,622 | 164,095
Unrealized Holding Gains | 113 | 126
Unrealized Holding Losses | 0 | (394)
Cash equivalents |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 17,909 | 54,285
Fair Value | 17,909 | 54,285
Unrealized Holding Gains | 0 | 0
Unrealized Holding Losses | 0 | 0
Short-term investments |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 43,600 | 42,994
Fair Value | 43,713 | 43,034
Unrealized Holding Gains | 113 | 44
Unrealized Holding Losses | 0 | (4)
Marketable securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost |  | 67,084
Fair Value |  | 66,776
Unrealized Holding Gains |  | 82
Unrealized Holding Losses |  | (390)
Money market funds |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 17,909 | 54,285
Fair Value | 17,909 | 54,285
Unrealized Holding Gains | 0 | 0
Unrealized Holding Losses | 0 | 0
U.S. corporate debt securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 43,600 | 110,078
Fair Value | 43,713 | 109,810
Unrealized Holding Gains | 113 | 126
Unrealized Holding Losses | $ 0 | $ (394)

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- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 + Details
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