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Note 21 - Segment Information (Details Textual)
6 Months Ended
Jun. 30, 2019
a
Segment
Segment Reporting Information [Line Items]  
Number of Reportable Segments | Segment 6
Eastman Business Park [Member] | Minimum [Member]  
Segment Reporting Information [Line Items]  
Area of Real Estate Property | a 1,200