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v3.19.1

Note 1 - Organization and Significant Accounting Policies (Details Textual) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 USD ($) $ / shares | Dec. 31, 2017 USD ($) $ / shares | Jan. 01, 2018 USD ($)
Number of Operating Segments | 2 |  |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 21.00% |  |
Standard and Extended Product Warranty Accrual, Ending Balance | $ 582,000 | $ 666,000 |
Product Warranty Expense | $ 136,000 | 253,000 |
Multi Employer Plans Collective Bargaining Arrangement Number of Participants | 459 |  |
Multiemployer Plans, Collective-Bargaining Arrangement, Percentage of Participants | 64.00% |  |
Retained Earnings (Accumulated Deficit), Ending Balance | $ (114,926,000) | (111,591,000) | $ (111,421,000)
Revenue from Contract with Customer, Including Assessed Tax | 87,969,000 | 82,294,000 |
Net Income (Loss) Attributable to Parent, Total | $ (3,505,000) | $ (10,822,000) |
Earnings Per Share, Basic, Total | $ / shares | $ (0.17) | $ (0.53) |
Operating Leases, Future Minimum Payments Due, Total | $ 11,273,000 |  |
Operating Income (Loss), Total | (4,296,000) | $ (12,146,000) |
Other Nonoperating Income (Expense), Total | 1,436,000 | 1,515,000 |
Accounting Standards Update 2014-09 [Member] |  |  |
Retained Earnings (Accumulated Deficit), Ending Balance |  |  | $ 170,000
Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member] |  |  |
Retained Earnings (Accumulated Deficit), Ending Balance | 63,000 |  |
Revenue from Contract with Customer, Including Assessed Tax | 600,000 |  |
Net Income (Loss) Attributable to Parent, Total | $ (106,000) |  |
Earnings Per Share, Basic, Total | $ / shares | $ (0.01) |  |
Operating Income (Loss), Total | $ (106,000) |  |
Other Nonoperating Income (Expense), Total | 0 |  |
Accounting Standards Update 2018-11 [Member] |  |  |
Operating Leases, Future Minimum Payments Due, Total | 11,273,000 |  |
Cumulative Effect on Retained Earnings, Net of Tax, Total | $ 1,442,000 |  |
Accounting Standards Update 2016-18 [Member] |  |  |
Cash, Period Increase (Decrease), Total |  | (1,500,000) |
Accounting Standards Update 2017-07 [Member] |  |  |
Operating Income (Loss), Total |  | 398,000 |
Other Nonoperating Income (Expense), Total |  | $ 398,000 |
Collective Bargaining Agreements That Expire in Next 12 Months [Member] |  |  |
Multi Employer Plans Collective Bargaining Arrangement Number of Participants | 36 |  |
Employee Benefit Related Adjustments Mexico [Member] |  |  |
Multi Employer Plans Collective Bargaining Arrangement Number of Participants | 423 |  |
Multiemployer Plans, Collective-Bargaining Arrangement, Percentage of Participants | 59.00% |  |
Accounts Receivable [Member] | Customer Concentration Risk [Member] |  |  |
Concentration Risk, Percentage | 40.00% | 30.00% |
Number of Major Customers | 2 | 2 |
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer Sistemas [Member] |  |  |
Concentration Risk, Percentage | 22.00% | 15.00% |
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Northrop Grumman [Member] |  |  |
Concentration Risk, Percentage | 18.00% | 15.00% |
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Customer Sistemas [Member] |  |  |
Concentration Risk, Percentage | 19.00% | 13.00% |
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Northrop Grumman [Member] |  |  |
Concentration Risk, Percentage | 14.00% | 13.00% |
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Customer Detroit Diesel [Member] |  |  |
Concentration Risk, Percentage | 14.00% | 14.00% |
Minimum [Member] | Accounting Standards Update 2018-11 [Member] |  |  |
Operating Lease, Right-of-Use Asset | $ 7,000,000 |  |
Operating Lease, Liability, Total | 7,500,000 |  |
Maximum [Member] | Accounting Standards Update 2018-11 [Member] |  |  |
Operating Lease, Right-of-Use Asset | 8,000,000 |  |
Operating Lease, Liability, Total | $ 8,500,000 |  |
Land, Buildings and Improvements [Member] |  |  |
Property, Plant and Equipment, Useful Life | 40 years |  |
Furniture and Fixtures [Member] | Minimum [Member] |  |  |
Property, Plant and Equipment, Useful Life | 3 years |  |
Machinery and Equipment [Member] | Maximum [Member] |  |  |
Property, Plant and Equipment, Useful Life | 15 years |  |

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