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Note 1 - Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2017
Notes Tables |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
|  | Customer Relationships |  |  | Weighted Average Life (years) |  |  | Non-Compete Agreemen t |  |  | Weighted Average Life (years ) |  |  | Customer Backlo g |  |  | Weighted Average Life (years ) |
December 31, 201 7 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cos t |  | $ | 15,530 |  |  |  | 8.8 |  |  | $ | 5,551 |  |  |  | 5.1 |  |  | $ | 122 |  |  |  | 0.5 |
Accumulated amortizatio n |  |  | (4,782 | ) |  |  |  |  |  |  | (4,619 | ) |  |  |  |  |  |  | (10 | ) |  |  |  |
Ne t |  | $ | 10,748 |  |  |  |  |  |  | $ | 932 |  |  |  |  |  |  | $ | 112 |  |  |  |  |
December 31, 201 6 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cos t |  | $ | 12,311 |  |  |  | 9.4 |  |  | $ | 5,370 |  |  |  | 5.1 |  |  | $ | 0 |  |  |  | N/A |
Accumulated amortizatio n |  |  | (4,490 | ) |  |  |  |  |  |  | (3,553 | ) |  |  |  |  |  |  | 0 |  |  |  |  |
Ne t |  | $ | 7,821 |  |  |  |  |  |  | $ | 1,817 |  |  |  |  |  |  | $ | 0 |  |  |  |  |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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