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 (Details)

v3.8.0.1
Fair Value Measurements - Summary of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($)
$ in Thousands
Dec. 30, 2017
Sep. 30, 2017
Dec. 24, 2016
Liabilities:      
Total liabilities $ 9,058 $ 9,343 $ 4,253
Liability for contingent consideration      
Liabilities:      
Total liabilities 9,058 9,343 4,253
Level 1      
Liabilities:      
Total liabilities 0 0 0
Level 1 | Liability for contingent consideration      
Liabilities:      
Total liabilities 0 0 0
Level 2      
Liabilities:      
Total liabilities 0 0 0
Level 2 | Liability for contingent consideration      
Liabilities:      
Total liabilities 0 0 0
Level 3      
Liabilities:      
Total liabilities 9,058 9,343 4,253
Level 3 | Liability for contingent consideration      
Liabilities:      
Total liabilities $ 9,058 $ 9,343 $ 4,253