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Note 3 - Intangible Assets (Tables) | 3 Months Ended
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Mar. 31, 2017
Notes Tables |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
|  |  |  |  | March 31, 2017 |  |  | December 31, 2016 |
|  | Useful |  |  | Gross |  |  |  |  |  |  | Net |  |  | Gross |  |  |  |  |  |  | Net |
|  | Lives |  |  | Carrying |  |  | Accumulated |  |  | Carrying |  |  | Carrying |  |  | Accumulated |  |  | Carrying |
|  | (Years) |  |  | Amount |  |  | Amortization |  |  | Amount |  |  | Amount |  |  | Amortization |  |  | Amount |
Intangibles (amount in thousands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Patent |  |  | 3 | - | 17 |  |  | $ | 586 |  |  |  | (282 | ) |  | $ | 304 |  |  | $ | 577 |  |  | $ | (274 | ) |  | $ | 303 |
Software |  |  |  | 3 |  |  |  |  | 405 |  |  |  | (388 | ) |  |  | 17 |  |  |  | 405 |  |  |  | (383 | ) |  |  | 22 |
Customer relationships |  |  |  | 12 |  |  |  |  | 3,370 |  |  |  | (2,042 | ) |  |  | 1,328 |  |  |  | 3,370 |  |  |  | (1,974 | ) |  |  | 1,396 |
Permit |  |  |  | 10 |  |  |  |  | 545 |  |  |  | (441 | ) |  |  | 104 |  |  |  | 545 |  |  |  | (428 | ) |  |  | 117 |
Total |  |  |  |  |  |  |  | $ | 4,906 |  |  | $ | (3,153 | ) |  | $ | 1,753 |  |  | $ | 4,897 |  |  | $ | (3,059 | ) |  | $ | 1,838 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
|  | Amount |
Year |  | (In thousands) |
2017 (remaining) |  | $ | 278 |
2018 |  |  | 337 |
2019 |  |  | 254 |
2020 |  |  | 218 |
2021 |  |  | 198 |

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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=66006027&loc=d3e16323-109275 + Details
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