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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
 3 Months Ended
Mar. 30, 2012
Apr. 01, 2011
Cash flows from operating activities:    
Net loss $ (1,411,000) $ (291,000)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:    
Depreciation and amortization 191,000 274,000
Lease abandonment expense, net 4,000 13,000
Gain (loss) on sale of equipment   (2,000)
Provision for doubtful accounts 58,000 10,000
Stock-based compensation 54,000 54,000
Changes in operating assets and liabilities:    
Accounts receivable 2,174,000 729,000
Costs and estimated earnings in excess of billings on uncompleted contracts (3,292,000) (630,000)
Other receivables 98,000 66,000
Prepaid expenses and other current assets 29,000 176,000
Other assets (67,000) 10,000
Accounts payable 2,314,000 (750,000)
Accrued liabilities (1,371,000) 239,000
Billings in excess of costs and estimated earnings on uncompleted contracts 435,000 805,000
Deferred lease obligations (40,000) (33,000)
Net cash (used in) provided by operating activities (824,000) 670,000
Cash flows from investing activities:    
Purchase of equipment and leasehold improvements (73,000) (201,000)
Proceeds from sale of equipment   1,000
Net cash used in investing activities (73,000) (200,000)
Cash flows from financing activities:    
Changes in excess of outstanding checks over bank balance 390,000 (117,000)
Payments on notes payable (257,000) (35,000)
Proceeds from notes payable   23,000
Borrowings under line of credit 5,469,000 7,237,000
Repayments on line of credit (2,725,000) (7,029,000)
Principal payments on capital lease obligations (48,000) (48,000)
Proceeds from stock option exercise 10,000  
Proceeds from sales of common stock under employee stock purchase plan 65,000 42,000
Net cash provided by financing activities 2,904,000 73,000
Net increase in cash and cash equivalents 2,007,000 543,000
Cash and cash equivalents at beginning of the period 3,001,000 6,642,000
Cash and cash equivalents at end of the period 5,008,000 7,185,000
Cash paid during the period for:    
Interest 21,000 23,000
Income taxes 17,000  
Supplemental disclosures of noncash investing and financing activities:    
Equipment acquired under capital lease obligations $ 10,000 $ 103,000