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, 2021 USD ($) ft²
Line of Credit Facility, Maximum Borrowing Capacity	$ 15,000
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 Resort [Member]
Pledged Assets not Separately Reported, Area of Real Estate (Square Foot) | ft²	30,000
Base Rate [Member]
Debt Instrument, Basis Spread on Variable Rate	0.01125%