EQUIPMENT AND LEASEHOLD IMPROVEMENTS (Details) (USD $)	Jan. 02, 2015	Dec. 27, 2013
EQUIPMENT AND LEASEHOLD IMPROVEMENTS
Equipment and leasehold improvements, Gross	$ 11,042,000	$ 11,517,000
Accumulated depreciation and amortization	(9,658,000)	(10,826,000)
Equipment and leasehold improvements, net	1,384,000	691,000
Furniture and fixtures
EQUIPMENT AND LEASEHOLD IMPROVEMENTS
Equipment and leasehold improvements, Gross	2,994,000	3,039,000
Computer hardware and software
EQUIPMENT AND LEASEHOLD IMPROVEMENTS
Equipment and leasehold improvements, Gross	5,667,000	6,338,000
Leasehold improvements
EQUIPMENT AND LEASEHOLD IMPROVEMENTS
Equipment and leasehold improvements, Gross	785,000	776,000
Equipment under capital leases
EQUIPMENT AND LEASEHOLD IMPROVEMENTS
Equipment and leasehold improvements, Gross	919,000	831,000
Accumulated depreciation and amortization	(176,000)	(152,000)
Automobiles, trucks, and field equipment
EQUIPMENT AND LEASEHOLD IMPROVEMENTS
Equipment and leasehold improvements, Gross	$ 677,000	$ 533,000