Acquisitions (Detail) (USD $)	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2012 Customer Relationships [Member] Year	Jun. 30, 2012 Technology [Member] Year	Jun. 30, 2012 In-Process Research And Development [Member]	Dec. 08, 2010 In-Process Research And Development [Member] Melanoma Diagnostics Inc [Member]
Cash and cash equivalents	$ 1,974,000
Accounts receivable	3,667,000
Inventory	5,865,000
Prepaid expenses and other assets	1,185,000
Property, equipment and leasehold improvements	2,883,000
Deferred tax asset	2,014,000
Intangible assets	14,950,000
Goodwill	56,850,000
Total assets acquired	89,388,000
Accounts payable and other liabilities	5,431,000
Deferred revenue	1,767,000
Liabilities assumed	7,198,000
Total net assets acquired	82,190,000
Amortizable of intangible assets	7,150,000
Estimated useful life of intangible assets, years		10	8
Indefinite-lived intangible assets				7,800,000
Upfront fee					$ 1,500,000