Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	6 Months Ended
	Jul. 04, 2015	Jan. 03, 2015
Fair Value of Financial Instruments.
Costs of services	$ 800
Payment of contingent consideration	300
Recurring | Level 1
Fair Value of Financial Instruments.
Total Assets	46	$ 20,042
Recurring | Level 1 | Money Market Funds
Fair Value of Financial Instruments.
Cash and cash equivalents	46	20,042
Recurring | Level 3
Fair Value of Financial Instruments.
Contingent acquisition liability	861	316
Total Liabilities	$ 861	$ 316