v3.4.0.3
Fair Value - Changes in Assets and Liabilities with Inputs Classified within Level 3 of Fair Value (Detail) - USD ($)
$ in Thousands
 6 Months Ended
Apr. 01, 2016
Apr. 03, 2015
Contingent Consideration [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Changes in financial liabilities with inputs classified within Level 3 of the fair value, beginning balance $ 1,150 $ 820
Net Realized/ Unrealized Losses Included in Earnings 46  
Purchases and Issuances 0 0
Sales and Settlements (400)  
Transfers in and/or (out) of Level 3 0 0
Changes in financial liabilities with inputs classified within Level 3 of the fair value, ending balance 796 820
Common Stock Warrant Liability [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Changes in financial liabilities with inputs classified within Level 3 of the fair value, beginning balance 21,822 15,801
Net Realized/ Unrealized Losses Included in Earnings 19,079 16,217
Purchases and Issuances 0 0
Transfers in and/or (out) of Level 3 0 0
Changes in financial liabilities with inputs classified within Level 3 of the fair value, ending balance $ 40,901 32,018
Trading Securities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Changes in financial asset with inputs classified within Level 3 of the fair value, beginning balance   250
Net Realized/ Unrealized Losses Included in Earnings   0
Purchases and Issuances   250
Sales and Settlements   0
Transfers in and/or (out) of Level 3   0
Changes in financial asset with inputs classified within Level 3 of the fair value, ending balance   $ 500