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Note 1 - Summary of Significant Accounting Policies (Details) (USD $)
 12 Months Ended
Dec. 28, 2013
Dec. 29, 2012
Dec. 31, 2011
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]      
Cash and Cash Equivalents, at Carrying Value $ 9,317,000 $ 14,123,000 $ 28,417,000
Goodwill, Impairment Loss 0 0  
Capitalized Computer Software, Additions 443,000 101,000  
Capitalized Computer Software, Net 505,000    
Gross Billings 67,300,000 64,800,000  
Construction Revenue 30,700,000 15,300,000  
Transit Account Receivable, Gross 4,000,000 10,000,000  
Transit Account Payable, Gross 3,900,000 12,000,000  
Transit Account Receivable, Net 100,000    
Transit Account Payable, Net   2,000,000  
Advertising Expense 490,000 497,000  
Ontario Power Group [Member] | Customer Concentration Risk [Member] | Sales Revenue, Net [Member]
      
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]      
Concentration Risk, Percentage 18.60%    
Ontario Power Group [Member] | Customer Concentration Risk [Member] | Accounts Receivable [Member]
      
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]      
Concentration Risk, Percentage 21.80% 11.80%  
Ontario Power Group [Member]
      
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]      
Transit Account Receivable, Net   1,900,000  
Accounts Receivable, Net   6,300,000  
United Technologies Corporation [Member] | Customer Concentration Risk [Member] | Sales Revenue, Net [Member]
      
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]      
Concentration Risk, Percentage 12.60% 11.80%  
United Technologies Corporation [Member] | Customer Concentration Risk [Member] | Accounts Receivable [Member]
      
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]      
Concentration Risk, Percentage 5.30% 7.50%  
New York Power Authority [Member] | Customer Concentration Risk [Member] | Accounts Receivable [Member]
      
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]      
Concentration Risk, Percentage 16.60% 23.30%  
New York Power Authority [Member]
      
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]      
Transit Account Receivable, Net 2,200,000 6,900,000  
Accounts Receivable, Net 10,200,000 12,500,000  
Five Largest Customers [Member] | Customer Concentration Risk [Member] | Sales Revenue, Net [Member]
      
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]      
Concentration Risk, Percentage 45.20% 37.40%  
Ten Largest Customers [Member] | Customer Concentration Risk [Member] | Sales Revenue, Net [Member]
      
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]      
Concentration Risk, Percentage 56.50% 46.90%  
Twenty Largest Customers [Member] | Customer Concentration Risk [Member] | Sales Revenue, Net [Member]
      
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]      
Concentration Risk, Percentage 65.60% 57.50%  
ERP Software System [Member]
      
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]      
Property, Plant and Equipment, Useful Life 15 years    
VOIP Telephone System [Member]
      
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]      
Property, Plant and Equipment, Useful Life 7 years    
Office Equipment [Member]
      
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]      
Property, Plant and Equipment, Useful Life 5 years    
CANADA
      
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]      
Cash and Cash Equivalents, at Carrying Value $ 3,300,000 $ 3,100,000  
Sales Revenue, Net [Member]
      
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]      
Concentration Risk, Percentage 18.00% 10.50%  
Restricted Covenants [Member]
      
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]      
Finite-Lived Intangible Asset, Useful Life 4 years    
Customer Relationships [Member]
      
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]      
Finite-Lived Intangible Asset, Useful Life 6 years