EQUIPMENT AND LEASEHOLD IMPROVEMENTS (Details) (USD $)	Sep. 28, 2012	Dec. 30, 2011
EQUIPMENT AND LEASEHOLD IMPROVEMENTS
Equipment and leasehold improvements, Gross	$ 11,760,000	$ 11,823,000
Accumulated depreciation and amortization	(10,746,000)	(10,606,000)
Equipment and leasehold improvements, net	1,014,000	1,217,000
Furniture and fixtures
EQUIPMENT AND LEASEHOLD IMPROVEMENTS
Equipment and leasehold improvements, Gross	3,367,000	3,393,000
Computer hardware and software
EQUIPMENT AND LEASEHOLD IMPROVEMENTS
Equipment and leasehold improvements, Gross	6,312,000	6,279,000
Leasehold improvements
EQUIPMENT AND LEASEHOLD IMPROVEMENTS
Equipment and leasehold improvements, Gross	824,000	787,000
Equipment under capital leases
EQUIPMENT AND LEASEHOLD IMPROVEMENTS
Equipment and leasehold improvements, Gross	790,000	821,000
Automobiles, trucks, and field equipment
EQUIPMENT AND LEASEHOLD IMPROVEMENTS
Equipment and leasehold improvements, Gross	$ 467,000	$ 543,000

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

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Gross amount of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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- Definition

Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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