Note 4 - Mortgage Notes Payable and Credit Facilities (Details) (USD $)						3 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2013 Subsequent to June 26,2013 [Member]	Jun. 30, 2013 Accordion Feature [Member] Line of Credit [Member]	Jun. 30, 2013 Accordion Feature [Member] Term Loan [Member]	Jun. 30, 2013 If Oustanding Principal Is Less Than Fifty Percent Of The Aggregate Commitments [Member]	Jun. 30, 2013 If Outstanding Principal Is Greater Than Or Equal To Fifty Percent Of Aggregate Commitments [Member]	Jun. 30, 2013 Spread On Federal Funds Rate [Member] Loan Agreements [Member]	Jun. 30, 2013 Spread On Eurodollar Rate [Member] Loan Agreements [Member]	Jun. 30, 2013 Line of Credit [Member]	Jun. 30, 2013 Term Loan [Member]
Note 4 - Mortgage Notes Payable and Credit Facilities (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity (in Dollars)				$ 300,000,000	$ 300,000,000					$ 200,000,000	$ 200,000,000
Line of Credit Facility, Extension Option, Term	1 year
Debt Instrument, Basis Spread on Variable Rate								0.50%	1.00%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage						0.35%	0.25%
Line of Credit, Fronting Fee	0.125%		0.125%
Line of Credit Facility, Amount Outstanding (in Dollars)	105,150,000	119,000,000								105,100,000	200,000,000
Line of Credit Facility, Interest Rate at Period End	1.80%
Line of Credit Facility, Remaining Borrowing Capacity (in Dollars)	$ 94,900,000