COMMITMENTS (Details) (USD $)	12 Months Ended
	Jan. 02, 2015	Dec. 27, 2013	Dec. 28, 2012
Future minimum rental payments under capital leases
2015	$ 352,000
2016	259,000
2017	56,000
Total future minimum lease payments	667,000
Amount representing maintenance	(24,000)
Amount representing interest	(13,000)
Interest rate, minimum (as a percent)	3.25%
Interest rate, maximum (as a percent)	3.75%
Present value of net minimum lease payments under capital leases	630,000
Less current portion	324,000	129,000
Capital lease noncurrent	306,000	85,000
Future minimum rental payments under non-cancelable operating leases
2015	1,862,000
2016	965,000
2017	695,000
2018	502,000
2019	494,000
Thereafter	49,000
Total future minimum lease payments	4,567,000
Operating leases rental income or expense
Rent expense and related charges for common area maintenance for all facility operating leases	3,004,000	3,405,000	3,615,000
Reconciliation of the liability for lease abandonment (recovery) expense
Liability for abandoned leases as of the beginning of the year	122,000	162,000
Lease abandonment expense (recovery), net	9,000	30,000	26,000
Lease payments on abandoned leases, net of sublease payments	(153,000)	(189,000)
Other	66,000	119,000
Liability for abandoned leases as of the end of the year	44,000	122,000	162,000
Employee Benefit Plans
Maximum employee contribution as a percentage of compensation under 401 (k) Plan	50.00%
Matching contributions by the company under 401(k) Plan	624,000	507,000	248,000
Bonus expense under discretionary bonus plan	1,500,000	262,000	258,000
Bonus expense included in accrued liabilities as of the balance sheet date	1,450,000	31,000
Post Employment Health Benefits
Unamortized compensation cost	0
Present value of expected payments for health insurance coverage	$ 139,000	$ 137,000