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		9 Months Ended
	Sep. 30, 2016	Oct. 02, 2015	Sep. 30, 2016	Oct. 02, 2015
Product Information [Line Items]
Revenue, percent	100.00%	100.00%	100.00%	100.00%
IT Solutions [Member]
Product Information [Line Items]
Revenue, percent	28.30%	32.60%	29.40%	33.00%
IT and Other Staffing [Member]
Product Information [Line Items]
Revenue, percent	71.70%	67.40%	70.60%	67.00%