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Note 12 - Segment Information (Details Textual)
1 Months Ended 3 Months Ended 9 Months Ended
Mar. 31, 2014
USD ($)
Dec. 31, 2016
Dec. 31, 2016
Number of Operating Segments     6
Global Ground Support [Member]      
Number of Commercial Deicing Units Sold   10  
Delphax [Member]      
Number of Elan Printers Sold   2  
Space Age Insurance Company [Member]      
Initial Capital $ 250,000