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Commitments and contingencies - Additional Information (Detail) (USD $)
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12 Months Ended | ||
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Jun. 30, 2011
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Jun. 30, 2010
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Jun. 30, 2009
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| Schedule of Operating Leases [Line Items] | |||
| Rent expense | $ 416,000 | $ 326,000 | $ 393,000 |
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- Definition
Schedule of Operating Leases [Line Items]
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- Definition
Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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