Note 8 - Bonds Payable, Loans Payable and Interest - Interest Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Interest	$ 1,817	$ 1,735	$ 3,552	$ 3,470
Amortization of bond premium and debt issuance costs	53	76	106	153
Total interest incurred	1,870	1,811	3,658	3,623
Less: capitalized interest	(1,788)	(1,811)	(3,576)	(3,623)
Interest expense	$ 82	$ 0	$ 82	$ 0