Summary of Significant Accounting Policies - Summary of IT Solutions and IT and Other Staffing Revenue as Percentage of Total Revenue (Details) - Product Concentration Risk [Member] - Sales Revenue, Services, Net [Member]	3 Months Ended		6 Months Ended
	Jul. 01, 2016	Jul. 03, 2015	Jul. 01, 2016	Jul. 03, 2015
Product Information [Line Items]
Revenue, percent	100.00%	100.00%	100.00%	100.00%
It Solutions [Member]
Product Information [Line Items]
Revenue, percent	29.50%	33.90%	29.80%	33.50%
It and Other Staffing [Member]
Product Information [Line Items]
Revenue, percent	70.50%	66.10%	70.20%	66.50%