Note 4 - Long-term Debt (Details Textual) - First Hawaiian Bank Revolving Line of Credit [Member] - Revolving Credit Facility [Member] $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($) ft² a	Dec. 31, 2017
Line of Credit Facility, Maximum Borrowing Capacity	$ 15,000
Number of Optional Extension Periods	2
Line of Credit Facility, Extension Period	1 year
Debt Instrument, Interest Rate, Effective Percentage	5.84%	4.86%
Line of Credit Facility, Commitment Fee Amount	$ 0
Debt Instrument, Covenant, Required Minimum Liquidity	2,000
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
London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate	3.50%