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Organization and Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended
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Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2013
Organization and Summary of Significant Accounting Policies Disclosure [Line Items] |  |  |
Proceeds from maturities and sales of marketable investment securities | $ 165.6 | $ 382.5 | $ 385.3
Effect of foreign exchange rates on cash and cash equivalents | (4.8) | (0.6) | (0.7)
Other receivables | 1.9 | 3.2 |
Trade accounts receivables | $ 85.8 | 81.9 |
Restatement Adjustment |  |  |
Organization and Summary of Significant Accounting Policies Disclosure [Line Items] |  |  |
Proceeds from maturities and sales of marketable investment securities |  | (0.6) | (0.7)
Effect of foreign exchange rates on cash and cash equivalents |  | 0.6 | $ 0.7
Other receivables |  | (0.6) |
Trade accounts receivables |  | $ 0.6 |
Equipment | Minimum |  |  |
Organization and Summary of Significant Accounting Policies Disclosure [Line Items] |  |  |
Estimated useful lives, in years | 5 years |  |
Equipment | Maximum |  |  |
Organization and Summary of Significant Accounting Policies Disclosure [Line Items] |  |  |
Estimated useful lives, in years | 7 years |  |
Leasehold Improvements | Minimum |  |  |
Organization and Summary of Significant Accounting Policies Disclosure [Line Items] |  |  |
Estimated useful lives, in years | 3 years |  |
Leasehold Improvements | Maximum |  |  |
Organization and Summary of Significant Accounting Policies Disclosure [Line Items] |  |  |
Estimated useful lives, in years | 15 years |  |

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- Definition Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3-4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -Subparagraph a(1) -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 4 -Article 5 + Details
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