Note 13 - Fair Value of Financial Instruments - Schedule of Carrying Amounts and Fair Values of Assets and Liabilities Measured at Fair Value on a Non Recurring Basis (Detail) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Reported Value Measurement [Member]
Assets, Fair Value Disclosure [Abstract]
Cash and cash equivalents	$ 13,931	$ 12,356
Restricted cash	4,829	4,675
Reported Value Measurement [Member] | Variable Rate Debt [Member]
Liabilities, Fair Value Disclosure [Abstract]
Mortgage and other indebtedness, net - carrying amount	87,669	111,380
Reported Value Measurement [Member] | Fixed Rate Debt [Member]
Liabilities, Fair Value Disclosure [Abstract]
Mortgage and other indebtedness, net - carrying amount	130,845	140,199
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member]
Assets, Fair Value Disclosure [Abstract]
Cash and cash equivalents	13,931	12,356
Restricted cash	4,829	4,675
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Variable Rate Debt [Member]
Liabilities, Fair Value Disclosure [Abstract]
Mortgage and other indebtedness, net - fair value	87,669	111,380
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Fixed Rate Debt [Member]
Liabilities, Fair Value Disclosure [Abstract]
Mortgage and other indebtedness, net - fair value	$ 127,830	$ 139,447