Organization and Summary of Significant Accounting Policies - Fair Value and Income Tax (Details) - USD ($) $ in Thousands	Jul. 01, 2017	Dec. 31, 2016
Assets:
Non-qualified Deferred Compensation Plan Investments	$ 704	$ 650
Liabilities:
Earn-out contingent consideration obligation	(1,554)	(1,791)
Fair Value, Inputs, Level 1 | Other Assets
Assets:
Non-qualified Deferred Compensation Plan Investments	704	650
Level 3 | Accrued Liabilities
Liabilities:
Earn-out contingent consideration obligation	(263)	(270)
Level 3 | Other Liabilities
Liabilities:
Earn-out contingent consideration obligation	$ (1,291)	$ (1,521)