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Investments in unconsolidated entities - Additional Information (Detail) (USD $) | 12 Months Ended |  | 1 Months Ended |  |  | 1 Months Ended | 12 Months Ended
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Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2012 Nephromics, LLC | Jun. 30, 2013 Nephromics, LLC | Apr. 30, 2013 H2Equity, LLC | Jun. 30, 2013 H2Equity, LLC | Jun. 30, 2012 H2Equity, LLC | Jul. 31, 2013 H2Equity, LLC Subsequent Event | Jun. 30, 2012 ACTGen, Inc.
Investments in and Advances to Affiliates [Line Items] |  |  |  |  |  |  |  |  |  |
Percentage of investment in equity interest |  |  |  |  | 16.80% |  | 6.50% |  |  |
Net investment on a cost basis | $ 0 | $ 3,254,000 | $ 0 | $ 2,400,000 |  |  |  |  |  | $ 854,000
Net investment under equity method |  |  |  | 505,000 | 505,000 |  | 26,000 | 551,000 |  |
Distribution received | 1,095,000 | 463,000 | 0 |  |  | 1,100,000 |  |  | 26,000 |
Gain on sale of investment assets |  |  |  |  |  | $ 708,000 |  |  |  |

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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 + Details
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- Definition Amount of gain (loss) on sale or disposal of an equity method investment. + References No definition available. + Details
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- Definition This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized. + 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 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=16385135&loc=d3e33749-111570 + Details
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- Definition The amount of other than temporary impairment (OTTI) losses on equity securities, OTTI related to credit losses on debt securities, and OTTI losses on debt securities when the entity intends to sell the securities or it is more likely than not that the entity will be required to sell the securities before recovery of its amortized cost basis. Additionally, this item includes OTTI losses recognized during the period on investments accounted for under the cost method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 8B -URI http://asc.fasb.org/extlink&oid=27724398&loc=SL6284393-111563 + Details
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- Definition Cash dividends or other distributions received from unconsolidated subsidiaries, certain corporate joint ventures, and certain noncontrolled corporations that are returns of capital. Excludes dividends or distributions from equity method investments classified as operating activities. + References No definition available. + Details
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