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Note 3 - Intangible Assets (Tables) | 3 Months Ended
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Mar. 31, 2015
Disclosure Text Block [Abstract] |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
|  |  |  |  |  | March 31, 2015 |  |  | December 31, 2014 |
|  | Useful |  |  | Gross |  |  |  |  |  |  | Net |  |  | Gross |  |  |  |  |  |  | Net |
|  | Lives |  |  | Carrying |  |  | Accumulated |  |  | Carrying |  |  | Carrying |  |  | Accumulated |  |  | Carrying |
(amount in thousands) |  | (Years) |  |  | Amount |  |  | Amortization |  |  | Amount |  |  | Amount |  |  | Amortization |  |  | Amount |
Intangibles |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Patent |  |  | 8-18 |  |  | $ | 512 |  |  | $ | (177 | ) |  | $ | 335 |  |  | $ | 512 |  |  | $ | (168 | ) |  | $ | 344 |
Software |  |  | 3 |  |  |  | 382 |  |  |  | (339 | ) |  |  | 43 |  |  |  | 375 |  |  |  | (319 | ) |  |  | 56 |
Customer relationships |  |  | 12 |  |  |  | 3,370 |  |  |  | (1,419 | ) |  |  | 1,951 |  |  |  | 3,370 |  |  |  | (1,335 | ) |  |  | 2,035 |
Permit |  |  | 10 |  |  |  | 545 |  |  |  | (332 | ) |  |  | 213 |  |  |  | 545 |  |  |  | (318 | ) |  |  | 227 |
Total |  |  |  |  |  | $ | 4,809 |  |  | $ | (2,267 | ) |  | $ | 2,542 |  |  | $ | 4,802 |  |  | $ | (2,140 | ) |  | $ | 2,662 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
|  | Amount |
Year |  | (In thousands) |
2015 (remaining) |  | $ | 376 |
2016 |  |  | 425 |
2017 |  |  | 391 |
2018 |  |  | 361 |
2019 |  |  | 280 |
|  | $ | 1,833 |

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- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. + 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=26713463&loc=d3e16323-109275 + Details
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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 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 Reference 2: 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=26713463&loc=d3e16323-109275 + Details
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