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Note 2 - Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2016
Notes Tables |
Disposal Groups, Including Discontinued Operations [Table Text Block] |
Net sales |  | $ | 22,225 |
Cost of sales |  |  | 23,881 |
Gross loss |  |  | (1,656 | )
Selling, general and administrative expense |  |  | 396 |
Operating loss |  |  | (2,052 | )
Loss on sale of business |  |  | (13,497 | )
Interest expense |  |  | (99 | )
Loss before income taxes |  |  | (15,648 | )
Income tax benefit |  |  | (3,934 | )
Loss on discontinued operations |  | $ | (11,714 | )
Schedule of Accrued Liabilities [Table Text Block] |
|  | December 31, |
|  | 2016 |  |  | 2015 |
Accrued liabilities: |  |  |  |  |  |  |  |
Accrued vacation payable |  | $ | 2,313 |  |  | $ | 3,029 |
Reserves for expected losses on uncompleted contracts |  |  | 1,409 |  |  |  | 5,933 |
Litigation accrual |  |  | 1,750 |  |  |  | - |
Accrued property taxes |  |  | 1,096 |  |  |  | 1,280 |
Contingent consideration payable |  |  | 84 |  |  |  | 1,211 |
Other |  |  | 4,273 |  |  |  | 4,518 |
Total accrued liabilities |  | $ | 10,925 |  |  | $ | 15,971 |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  | 2016 |  |  | 2015 |  |  | 2014 |
Loss from continuing operations |  | $ | (9,263 | ) |  | $ | (29,388 | ) |  | $ | (6,173 | )
Loss from discontinued operations |  |  | - |  |  |  | - |  |  |  | (11,714 | )
Net loss |  | $ | (9,263 | ) |  | $ | (29,388 | ) |  | $ | (17,887 | )
Basic weighted-average common shares outstanding |  |  | 9,588 |  |  |  | 9,560 |  |  |  | 9,515 |
Effect of potentially dilutive common shares (1) |  |  | - |  |  |  | - |  |  |  | - |
Diluted weighted-average common shares outstanding |  |  | 9,588 |  |  |  | 9,560 |  |  |  | 9,515 |
Loss per basic and diluted common share: |  |  |  |  |  |  |  |  |  |  |  |
Continuing operations |  | $ | (0.97 | ) |  | $ | (3.07 | ) |  | $ | (0.65 | )
Discontinued operations |  |  | - |  |  |  | - |  |  |  | (1.23 | )
Total |  | $ | (0.97 | ) |  | $ | (3.07 | ) |  | $ | (1.88 | )
Antidilutive shares excluded from net loss per diluted common share calculation |  |  | 27 |  |  |  | 52 |  |  |  | 65 |

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