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Share-Based Compensation - Additional Information (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2014
Options granted after December 5, 2012
Jun. 30, 2014
Options granted prior to December 5, 2012
Jun. 30, 2014
Cost Of Molecular Diagnostic Testing
Jun. 30, 2013
Cost Of Molecular Diagnostic Testing
Jun. 30, 2012
Cost Of Molecular Diagnostic Testing
Jun. 30, 2014
Research And Development Expense
Jun. 30, 2013
Research And Development Expense
Jun. 30, 2012
Research And Development Expense
Jun. 30, 2014
Selling, General, and Administrative Expenses
Jun. 30, 2013
Selling, General, and Administrative Expenses
Jun. 30, 2012
Selling, General, and Administrative Expenses
Jun. 30, 2014
Crescendo Biosciences, Inc.
Cost Of Molecular Diagnostic Testing
Jun. 30, 2014
Crescendo Biosciences, Inc.
Research And Development Expense
Jun. 30, 2014
Crescendo Biosciences, Inc.
Selling, General, and Administrative Expenses
Jun. 30, 2014
The 2010 Plan
Dec. 05, 2013
The 2010 Plan
Jun. 30, 2014
The 2010 Plan
Maximum
Dec. 05, 2012
1995 Purchase Plan
Dec. 05, 2012
1995 Purchase Plan
Jun. 30, 2014
2012 Purchase Plan
Dec. 05, 2012
2012 Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                                
Number of shares approved                                     3,500,000     2,000,000   2,000,000
Shares reserved for issuance exercise of options                                   3,757,381            
Shares available for future grant                                       5,005,532        
Service period of option vested, years                                   4 years            
Options expire from date of grant, years       8 years 10 years                                      
Options exercisable, weighted average remaining contractual life 5 years 6 months 22 days                                              
Total share-based compensation expense $ 33,997 $ 26,612 $ 26,275     $ 833 $ 1,030 $ 1,158 $ 5,429 $ 3,246 $ 3,350 $ 27,418 $ 22,117 $ 21,682 $ 200 $ 2,000 $ 4,700              
Total unrecognized share-based compensation cost, weighted-average period, years 2 years 3 months 18 days                                              
Shares purchased under the Plan 169,000 149,000 161,000                                   1,990,000   169,000