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Note 20 - Segment Information (Details Textual)
3 Months Ended
Mar. 31, 2017
USD ($)
a
Segment
Mar. 31, 2016
USD ($)
Segment Reporting Information [Line Items]    
Number of Reportable Segments | Segment 7  
Discontinued Operations [Member]    
Segment Reporting Information [Line Items]    
Overhead costs no longer absorbed by the Prosper discontinued operations   $ 4,000,000
Eastman Business Park Rochester NY [Member]    
Segment Reporting Information [Line Items]    
Manufacturing Costs $ 0 $ 0
Eastman Business Park Rochester NY [Member] | Minimum [Member]    
Segment Reporting Information [Line Items]    
Area of Real Estate Property | a 1,200