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Note 10 - Reserves | 12 Months Ended
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Dec. 31, 2018
Notes to Financial Statements |
SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] |
1 0 . | RESERVES
Allowance for doubtful accounts for 2018 and 2017 were as follows:
Description |  | Balance at Beginning of Year |  |  | Increase |  |  | Decrease |  |  | Balance at End of Year |
| (in thousands) |
Allowance for Doubtful Accounts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2018 |  | $ | 40 |  |  | $ | - |  |  | $ | (6 | ) |  | $ | 34 |
2017 |  | $ | 57 |  |  | $ | - |  |  | $ | (17 | ) |  | $ | 40 |

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- Definition The entire disclosure for valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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