Note 5 - Below-market Lease Intangibles - Below-market Lease Intangibles Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Below-market leases	$ 23,178	$ 23,178
Less accumulated amortization	(20,709)	(20,255)
Total	$ 2,469	$ 2,923

Amount of accumulated amortization of leases acquired as part of a real property acquisition at below market lease rate with a finite life.

No definition available.

Name:	us-gaap_BelowMarketLeaseAccumulatedAmortization
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant