Note 2 - Real Estate Investments (Details) (USD $)	3 Months Ended			3 Months Ended				1 Months Ended		3 Months Ended	4 Months Ended	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 Joint Venture Which Owns the Crossroads Shopping Center [Member]	Jun. 30, 2013 Joint Venture Which Owns the Crossroads Shopping Center [Member] Second Mortgage [Member]	Jun. 30, 2013 Joint Venture Which Owns the Crossroads Shopping Center [Member]	Jun. 30, 2013 Crossroads Shopping Center [Member]	Dec. 31, 2012 Crossroads Shopping Center [Member]	Feb. 01, 2013 Diamond Bar Town Center [Member] sqft	Feb. 06, 2013 Bernardo Heights Plaza [Member] sqft	Apr. 15, 2013 Canyon Crossing Shopping Center [Member] sqft	Apr. 22, 2013 Diamond Hills Plaza [Member] sqft	Jun. 27, 2013 Hawthorne Crossing [Member] sqft	Jun. 27, 2013 Granada Shopping Center [Member] sqft
Note 2 - Real Estate Investments (Details) [Line Items]
Business Combination, Consideration Transferred								$ 27,400,000	$ 12,400,000	$ 35,000,000	$ 48,000,000	$ 41,500,000	$ 17,500,000
Area of Real Estate Property (in Square Feet)								100,000	38,000	121,000	140,000	141,000	69,000
Payments to Acquire Businesses, Gross									3,600,000
Business Combination, Consideration Transferred, Liabilities Incurred									8,900,000
Business Combination, Mortgage Assumed	9,670,900	8,428,062							9,700,000
Mortgage Loans on Real Estate				10,000,000
Equity Method Investment, Ownership Percentage			49.00%			49.00%	49.00%
Mortgage Loans on Real Estate, Interest Rate	3.30%			8.00%
Notes Receivable, Related Parties					294,000
Equity Method Investments						$ 15,600,000	$ 15,300,000