Note 8 - Mortgage and Other Indebtedness - Mortgage Indebtedness (Details Textual) - USD ($) $ in Thousands								12 Months Ended
	Mar. 27, 2025	Jan. 31, 2025	Oct. 28, 2024	Apr. 30, 2024	Feb. 08, 2024	Jun. 28, 2023	Dec. 27, 2019	Dec. 31, 2024	Dec. 31, 2023	May 01, 2023
Debt Instrument [Line Items]
Mortgage loan								$ 247,050	$ 231,049
Highlandtown Village Shopping Center [Member]
Debt Instrument [Line Items]
Mortgage loan						$ 16,200
Greenwood Village [Member] | Interest Rate Swap [Member]
Debt Instrument [Line Items]
Debt instrument, effective interest rate										5.85%
Greenwood Village [Member] | SOFR [Member]
Debt Instrument [Line Items]
Debt instrument, effective interest rate										5.85%
Hollinswood Loan [Member] | Interest Rate Cap [Member]
Debt Instrument [Line Items]
Debt instrument variable rate							4.06%
Hollinswood Shopping Center [Member]
Debt Instrument [Line Items]
Mortgage loan maturity period			2025-03
Hollinswood Shopping Center [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Mortgage loan maturity period	2025-06
Brookhill Azalea Shopping Center [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Mortgage loan maturity period		2025-04
Midtown Colonial and Midtown Lamonticello Properties [Member
Debt Instrument [Line Items]
Mortgage loan maturity period				2027-05
Mortgages [Member]
Debt Instrument [Line Items]
Outstanding mortgage indebtedness								$ 232,300	$ 208,400
Mortgage Loan [Member] | Vista Shops at Golden Mile [Member]
Debt Instrument [Line Items]
Mortgage loan maturity period					2029-02	2024-06
Debt instrument, effective interest rate						7.73%
Mortgage Loan [Member] | Interest Rate Swap [Member] | Vista Shops at Golden Mile [Member]
Debt Instrument [Line Items]
Debt instrument, effective interest rate					6.90%
Mortgage Loan [Member] | SOFR [Member] | Vista Shops at Golden Mile [Member]
Debt Instrument [Line Items]
Debt instrument variable rate					2.75%
Mortgage Loan [Member] | Greenwood Village [Member]
Debt Instrument [Line Items]
Debt instrument, effective interest rate										5.85%