Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Summary of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail)

v3.2.0.727
Fair Value Measurements - Summary of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($)
$ in Thousands
Jun. 27, 2015
Sep. 27, 2014
Jun. 28, 2014
Assets:      
Total assets   $ 9,990 $ 14,220
Liabilities:      
Total liabilities $ 4,343 4,414 4,414
Liability for Contingent Consideration [Member]      
Liabilities:      
Total liabilities 4,343 4,414 4,414
Certificates of Deposit [Member]      
Assets:      
Total assets     14,220
Short Term Investments [Member]      
Assets:      
Total assets   9,990  
Level 1 [Member]      
Assets:      
Total assets   9,990 0
Liabilities:      
Total liabilities 0 0 0
Level 1 [Member] | Liability for Contingent Consideration [Member]      
Liabilities:      
Total liabilities 0 0 0
Level 1 [Member] | Certificates of Deposit [Member]      
Assets:      
Total assets     0
Level 1 [Member] | Short Term Investments [Member]      
Assets:      
Total assets   9,990  
Level 2 [Member]      
Assets:      
Total assets   0 14,220
Liabilities:      
Total liabilities 0 0 0
Level 2 [Member] | Liability for Contingent Consideration [Member]      
Liabilities:      
Total liabilities 0 0 0
Level 2 [Member] | Certificates of Deposit [Member]      
Assets:      
Total assets     14,220
Level 2 [Member] | Short Term Investments [Member]      
Assets:      
Total assets   0  
Level 3 [Member]      
Assets:      
Total assets   0 0
Liabilities:      
Total liabilities 4,343 4,414 4,414
Level 3 [Member] | Liability for Contingent Consideration [Member]      
Liabilities:      
Total liabilities $ 4,343 4,414 4,414
Level 3 [Member] | Certificates of Deposit [Member]      
Assets:      
Total assets     $ 0
Level 3 [Member] | Short Term Investments [Member]      
Assets:      
Total assets   $ 0