Fair Value Disclosure - Cash Equivalents and Long-term Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Jun. 30, 2016
Fair Value, Measurements, Recurring
Asset at Fair Value
Total	$ 2,955	$ 2,958
Fair Value, Measurements, Recurring \| Level 1
Asset at Fair Value
Total	312	315
Fair Value, Measurements, Recurring \| Level 2
Asset at Fair Value
Total	0	0
Fair Value, Measurements, Recurring \| Level 3
Asset at Fair Value
Total	2,643	2,643
Money market funds \| Fair Value, Measurements, Recurring
Asset at Fair Value
Money market funds	312	315
Money market funds \| Fair Value, Measurements, Recurring \| Level 1
Asset at Fair Value
Money market funds	312	315
Money market funds \| Fair Value, Measurements, Recurring \| Level 2
Asset at Fair Value
Money market funds	0	0
Money market funds \| Fair Value, Measurements, Recurring \| Level 3
Asset at Fair Value
Money market funds	0	0
Auction rate securities \| Fair Value, Measurements, Recurring
Asset at Fair Value
Auction rate securities	2,643	2,643
Auction rate securities \| Fair Value, Measurements, Recurring \| Level 1
Asset at Fair Value
Auction rate securities	0	0
Auction rate securities \| Fair Value, Measurements, Recurring \| Level 2
Asset at Fair Value
Auction rate securities	0	0
Auction rate securities \| Fair Value, Measurements, Recurring \| Level 3
Asset at Fair Value
Auction rate securities	2,643	2,643
Cash
Asset at Fair Value
Cash and cash equivalents	146,153	180,426
Certificates of deposit
Asset at Fair Value
Certificates of deposit	$ 2,054	$ 2,133

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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=66048111&loc=d3e19207-110258

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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=65884222&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=73527792&loc=d3e27232-111563

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
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-Section 45
-Paragraph 1
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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Cash
-URI http://asc.fasb.org/extlink&oid=6506951

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Cash Equivalents
-URI http://asc.fasb.org/extlink&oid=6507016

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Investment in short-term money-market instruments (such as commercial paper, banker's acceptances, repurchase agreements, government securities, certificates of deposit, and so forth) which are highly liquid (that is, readily convertible to known amounts of cash) and so near their maturity that they present an insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify as cash equivalents by definition. Original maturity means an original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

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-Name Accounting Standards Codification
-Glossary Cash Equivalents
-URI http://asc.fasb.org/extlink&oid=6507016

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Fair value portion of other assets.

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