Note 1 - Description of Business and Significant Accounting Policies (Details Textual)	12 Months Ended
	Dec. 31, 2022 USD ($) a $ / shares shares	Dec. 31, 2021 USD ($) shares
Capital Units, Authorized	48,000,000
Common Stock, Shares Authorized	43,000,000	43,000,000
Common Stock, Par or Stated Value Per Share | $ / shares	$ 0.0001
Preferred Stock, Shares Authorized	5,000,000
Preferred Stock, Par or Stated Value Per Share | $ / shares	$ 0.0001
Asset Impairment Charges, Total | $	$ 0	$ 40,000
Impairment of Deferred Development Costs | $	$ 0	$ 0
Weighted Average Number of Shares Outstanding, Basic, Total	19,400,000	19,400,000
Subsidized Stewardship and Conservation Efforts [Member]
Government Assistance, Amount | $	$ 400,000	$ 700,000
Minimum [Member]
Property, Plant and Equipment, Useful Life	3 years
Maximum [Member]
Property, Plant and Equipment, Useful Life	40 years
HAWAII
Area of Land | a	22,000