Schedule Of Comparison Of Balance Sheet Assets By Operating Segment (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Jun. 30, 2012
Segment Reporting Information [Line Items]
Net equipment and leasehold improvements	$ 27,602	$ 24,231
Total assets by segment	803,821	690,635
Operating Segments
Segment Reporting Information [Line Items]
Net equipment and leasehold improvements	27,602	24,231
Total assets by segment	272,757	236,411
Research | Operating Segments
Segment Reporting Information [Line Items]
Net equipment and leasehold improvements	8,590	8,924
Total assets by segment	82,517	77,221
Molecular Diagnostics | Operating Segments
Segment Reporting Information [Line Items]
Net equipment and leasehold improvements	15,769	12,852
Total assets by segment	110,329	72,777
Companion Diagnostics | Operating Segments
Segment Reporting Information [Line Items]
Net equipment and leasehold improvements	3,243	2,455
Total assets by segment	$ 79,911	$ 86,413