Note 2 - Real Estate Investments (Details) $ in Millions	Sep. 01, 2015 USD ($) ft²	Jul. 28, 2015 USD ($) ft²	Jul. 01, 2015 USD ($) ft²	May. 06, 2015 USD ($) ft²	Jan. 07, 2015 USD ($) ft²	Jan. 06, 2015 USD ($) ft²
Ontario Plaza [Member]
Note 2 - Real Estate Investments (Details) [Line Items]
Business Combination, Consideration Transferred						$ 31.0
Area of Real Estate Property | ft²						150,000
Park Oaks Shopping Center [Member]
Note 2 - Real Estate Investments (Details) [Line Items]
Business Combination, Consideration Transferred						$ 47.7
Area of Real Estate Property | ft²						110,000
Winston Manor Shopping Center [Member]
Note 2 - Real Estate Investments (Details) [Line Items]
Business Combination, Consideration Transferred					$ 20.5
Area of Real Estate Property | ft²					50,000
Pinole Vista Shopping Center and Canyon Park Shopping Center [Member]
Note 2 - Real Estate Investments (Details) [Line Items]
Business Combination, Consideration Transferred				$ 23.1
Area of Real Estate Property | ft²				59,000
Jackson Square [Member]
Note 2 - Real Estate Investments (Details) [Line Items]
Business Combination, Consideration Transferred			$ 32.5
Area of Real Estate Property | ft²			114,000
Sunnyside Village Square [Member]
Note 2 - Real Estate Investments (Details) [Line Items]
Business Combination, Consideration Transferred		$ 17.5
Area of Real Estate Property | ft²		89,000
Tigard Promenade [Member]
Note 2 - Real Estate Investments (Details) [Line Items]
Business Combination, Consideration Transferred		$ 21.0
Area of Real Estate Property | ft²		88,000
Gateway Centre [Member]
Note 2 - Real Estate Investments (Details) [Line Items]
Business Combination, Consideration Transferred	$ 42.5
Area of Real Estate Property | ft²	110,000