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Note 10 - Reserves (Tables) | 12 Months Ended
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Dec. 31, 2017
Notes Tables |
Summary of Valuation Allowance [Table Text Block] |
Description |  | Balance at Beginning of Year |  |  | Increase |  |  | Decrease |  |  | Balance at End of Year |
(in thousands) |
Allowance for Doubtful Accounts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2017 |  | $ | 57 |  |  | $ | - |  |  | $ | (17 | ) |  | $ | 40 |
2016 |  | $ | 319 |  |  | $ | 578 |  |  | $ | (840 | ) |  | $ | 57 |

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- Definition Tabular disclosure of valuation allowances to reduce deferred tax assets to net realizable value, including identification of the deferred tax asset more likely than not will not be fully realized and the corresponding amount of the valuation allowance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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Period Type: | duration

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- References No definition available. + Details
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