Note 6 - Long-term Debt (Details Textual) - First Hawaiian Bank Revolving Line of Credit [Member] - Revolving Credit Facility [Member] $ in Thousands		9 Months Ended
	Aug. 05, 2016 USD ($)	Sep. 30, 2017 USD ($) 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
Debt Instrument, Interest Rate, Effective Percentage		4.46%
Line of Credit Facility, Commitment Fee Amount	$ 0
Debt Instrument, Covenant, Required Minimum Liquidity		$ 1,000
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%