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v3.19.1

Note 1 - Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 30, 2017 | Dec. 29, 2018 | Dec. 30, 2017 | Dec. 31, 2016
Cash and Cash Equivalents, at Carrying Value, Ending Balance | $ 2,851 | $ 482 | $ 2,851 | $ 279
Accounts Receivable, Net, Current, Total | 46,080 | $ 52,335 | 46,080 |
Number of Reporting Units |  | 3 |  |
Goodwill, Impairment Loss |  | $ 0 | 3,478 |
Capitalized Computer Software, Additions |  | 1,150 | 594 |
Capitalized Computer Software, Net, Ending Balance | 1,841 | 2,255 | 1,841 |
Deferred Tax Assets, Valuation Allowance, Total | $ 0 | $ 0 | $ 0 |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 35.00% | 21.00% | 34.00% |
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability |  | $ 1,000 | $ 1,000 |
Revenue from Contract with Customer, Including Assessed Tax |  | 200,352 | 186,737 |
Contract with Customer, Liability, Total | $ 600 | 200 | 600 |
Contract with Customer, Liability, Revenue Recognized |  | 600 |  |
Gross Billings |  | 32,900 | 38,900 |
Advertising Expense |  | $ 671 | $ 700 |
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | New York City Board of Education [Member] |  |  |  |
Concentration Risk, Percentage |  | 13.00% |  |
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Five Largest Customers [Member] |  |  |  |
Concentration Risk, Percentage |  | 40.90% | 37.90% |
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Ten Largest Customers [Member] |  |  |  |
Concentration Risk, Percentage |  | 54.60% | 51.40% |
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Twenty Largest Customers [Member] |  |  |  |
Concentration Risk, Percentage |  | 67.40% | 65.20% |
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Sikorsky Aircraft [Member] |  |  |  |
Concentration Risk, Percentage |  |  | 10.40% |
Accounts Receivable [Member] | Customer Concentration Risk [Member] | New York City Board of Education [Member] |  |  |  |
Concentration Risk, Percentage |  | 16.00% | 14.90% |
Accounts Receivable [Member] | Customer Concentration Risk [Member] | New York Power Authority [Member] |  |  |  |
Concentration Risk, Percentage |  | 22.70% | 11.90% |
Total Accounts Receivable and Transit Accounts Receivable [Member] | Customer Concentration Risk [Member] | New York Power Authority [Member] |  |  |  |
Concentration Risk, Percentage |  | 23.30% | 14.00% |
Service, Other [Member] |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  | $ 1,800 | $ 2,600 |
Construction [Member] |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  | 23,400 | 26,100 |
Information Technology [Member] |  |  |  |
Goodwill, Impairment Loss |  |  | 3,478 |
Revenue from Contract with Customer, Including Assessed Tax |  | 30,611 | 32,668 |
Engineering [Member] |  |  |  |
Goodwill, Impairment Loss |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  | $ 86,078 | $ 82,753 |
Engineering [Member] | Total Revenue From Agreements [Member] |  |  |  |
Concentration Risk, Percentage |  | 11.70% | 14.00% |
Restricted Covenants [Member] |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  | 4 years |  |
Customer Relationships [Member] |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  | 6 years |  |
Furniture and Fixtures [Member] |  |  |  |
Property, Plant and Equipment, Useful Life |  | 5 years |  |
Transit Accounts Payable [Member] |  |  |  |
Accounts Payable, Current, Total | 4,700 | $ 2,500 | $ 4,700 |
Liabilities, Net | 1,700 |  | 1,700 |
Transit Accounts Receivable [Member] |  |  |  |
Accounts Receivable, Gross, Current | 3,000 | 2,600 | 3,000 |
Accounts Receivable, Net, Current, Total |  | 100 |  |
CANADA |  |  |  |
Cash and Cash Equivalents, at Carrying Value, Ending Balance | $ 52 | 32 | 52 |
Revenue from Contract with Customer, Including Assessed Tax |  | $ 27,869 | $ 30,084 |

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