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Note 20 - Segment Information (Details Textual)
3 Months Ended
Mar. 31, 2018
a
Segment
Segment Reporting Information [Line Items]  
Number of Reportable Segments | Segment 7
Eastman Business Park [Member] | Minimum [Member]  
Segment Reporting Information [Line Items]  
Area of Real Estate Property | a 1,200