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Note 6 - Long-term Debt (Details) $ in Thousands | Dec. 31, 2016 USD ($)
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JP Morgan Chase Bank NA (Chase) Note |
Debt Instrument, Face Amount | $ 14,000
JP Morgan Chase London Branch Note |
Debt Instrument, Face Amount | $ 12,934

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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_LongtermDebtTypeAxis=fil_JPMorganChaseLondonBranchNoteMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |