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Note 4 - Long-term Debt (Details Textual) - First Hawaiian Bank Revolving Line of Credit [Member] - Revolving Credit Facility [Member] $ in Thousands | 12 Months Ended
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Dec. 31, 2017 USD ($) ft² a
Line of Credit Facility, Maximum Borrowing Capacity | $ 15,000
Number of Optional Extension Periods | 2
Line of Credit Facility, Extension Period | 1 year
Line of Credit Facility, Commitment Fee Amount | $ 0
Debt Instrument, Covenant, Required Minimum Liquidity | 1,500
Debt Instrument, Covenant, Maximum Total Liabilities | $ 45,000
Kapalua Mauka [Member] |
Pledged Assets not Separately Reported, Area of Real Estate | a | 800
Kapalua Resort [Member] |
Pledged Assets not Separately Reported, Area of Real Estate | ft² | 30,000
Minimum [Member] |
Debt Instrument, Interest Rate, Effective Percentage | 4.86%
Maximum [Member] |
Debt Instrument, Interest Rate, Effective Percentage | 4.37%
London Interbank Offered Rate (LIBOR) [Member] |
Debt Instrument, Basis Spread on Variable Rate | 3.50%

X
- Definition Represents the maximum total liabilities allowed under a debt instrument's covenant. + References No definition available. + Details
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Balance Type: | credit
Period Type: | instant

X
- Definition Represents the minimum amount of liquidity required to be maintained under financial covenants. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Period of time between issuance and maturity of the optional extension period, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

X
- Definition The number of optional extension periods available under credit facilities that the company has. + References No definition available. + Details
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Balance Type: | na
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X
- Definition Area of real estate owned but transferred to serve as collateral for the payment of the related debt obligation, primarily a secured borrowing or repurchase agreement, and for which the transferee is not permitted to sell or re-pledge them to an unrelated party. + References No definition available. + Details
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Balance Type: | na
Period Type: | instant

X
- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

X
- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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 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=64930785&loc=d3e28551-108399 + Details
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X
- Definition Amount of the fee for available but unused credit capacity under the credit facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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Balance Type: | debit
Period Type: | duration

X
- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Details
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- Details
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- Details
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- Details
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- Details
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- Details
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- Details
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