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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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