SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 3) (USD $)	12 Months Ended
	Jan. 02, 2015 item	Dec. 27, 2013	Dec. 28, 2012
Accounting for Contracts
Number of principal types of pricing provisions	3
Costs of contract revenue
Payroll taxes, bonuses and employee benefit costs for all Company personnel	$ 21,394,000	$ 20,555,000	$ 22,421,000
Facilities costs	4,371,000	4,654,000	4,871,000
Cost of Sales
Costs of contract revenue
Payroll taxes, bonuses and employee benefit costs for all Company personnel	0
Facilities costs	$ 0