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Note 1 - Summary of Significant Accounting Policies (Details Textual) - USD ($)	12 Months Ended
	Jan. 02, 2016	Jan. 03, 2015	Dec. 28, 2013
CANADA
Cash and Cash Equivalents, at Carrying Value	$ 100,000	$ 3,300,000
ERP Software System [Member]
Property, Plant and Equipment, Useful Life	15 years
VOIP Telephone System [Member]
Property, Plant and Equipment, Useful Life	7 years
Furniture and Fixtures [Member]
Property, Plant and Equipment, Useful Life	5 years
Restricted Covenants [Member]
Finite-Lived Intangible Asset, Useful Life	4 years
Customer Relationships [Member]
Finite-Lived Intangible Asset, Useful Life	6 years
Engineering [Member] | Total Revenue From Agreements [Member]
Concentration Risk, Percentage	18.60%	21.20%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | New York Power Authority [Member]
Concentration Risk, Percentage	17.40%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Ontario Power Group [Member]
Concentration Risk, Percentage	16.50%	29.40%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | New York City Board of Education [Member]
Concentration Risk, Percentage	10.30%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | United Technologies Corporation [Member]
Concentration Risk, Percentage		3.30%
Total Accounts Receivable and Transit Accounts Receivable [Member] | Customer Concentration Risk [Member] | New York Power Authority [Member]
Concentration Risk, Percentage	16.80%	14.10%
Total Accounts Receivable and Transit Accounts Receivable [Member] | Customer Concentration Risk [Member] | Ontario Power Group [Member]
Concentration Risk, Percentage	15.50%
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Ontario Power Group [Member]
Concentration Risk, Percentage		21.40%
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Five Largest Customers [Member]
Concentration Risk, Percentage	33.70%	48.10%
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Ten Largest Customers [Member]
Concentration Risk, Percentage	48.30%	61.40%
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Twenty Largest Customers [Member]
Concentration Risk, Percentage	60.50%	69.80%
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | United Technologies Corporation [Member]
Concentration Risk, Percentage		12.90%
Transit Accounts Receivable [Member] | New York Power Authority [Member]
Other Receivables, Net, Current	$ 1,000,000	$ 1,400,000
Transit Accounts Receivable [Member] | Ontario Power Group [Member]
Other Receivables, Net, Current	1,100,000
Transit Accounts Receivable [Member]
Other Receivables, Net, Current	7,500,000	3,800,000
Transit Accounts Payable [Member]
Accounts Payable, Other, Current	9,000,000	6,700,000
Accounts Payable, Net	1,500,000	2,900,000
New York Power Authority [Member]
Accounts Receivable, Net	9,800,000	8,900,000
Ontario Power Group [Member]
Accounts Receivable, Net	9,500,000
Goodwill, Impairment Loss	0	0
Deferred Tax Assets, Valuation Allowance	0	0
Cash and Cash Equivalents, at Carrying Value	985,000	6,411,000	$ 9,317,000
Capitalized Computer Software, Additions	2,249,000	359,000
Capitalized Computer Software, Net	2,386,000	643,000
Gross Billings	65,900,000	72,600,000
Construction Revenue	34,500,000	41,000,000
Other Receivables, Net, Current	7,481,000	3,797,000
Accounts Payable, Other, Current	8,995,000	6,658,000
Sales Revenue, Services, Other	3,400,000	2,300,000
Advertising Expense	$ 635,000	$ 680,000

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