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Note 8 - Long-term Debt (Details Textual) | 12 Months Ended
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Dec. 31, 2018 USD ($)
Minimum [Member] | Variable Interest Rate Notes [Member] |
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate | 4.00%
Debt Instrument, Periodic Payment, Total | $ 5,330
Minimum [Member] | Fixed Interest Rate Notes [Member] |
Debt Instrument, Periodic Payment, Total | $ 255
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate | 2.95%
Maximum [Member] | Variable Interest Rate Notes [Member] |
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate | 4.50%
Debt Instrument, Periodic Payment, Total | $ 125,833
Maximum [Member] | Fixed Interest Rate Notes [Member] |
Debt Instrument, Periodic Payment, Total | $ 72,315
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate | 7.61%

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- Definition Amount of the required periodic payments including both interest and principal payments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 + Details
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Balance Type: | debit
Period Type: | duration

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- Definition The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a rate subject to change from time to time. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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