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Note 7 - Inventories - Inventories (Details) - USD ($)
Sep. 30, 2016
Mar. 31, 2016
Ground support service parts $ 2,282,627 $ 1,566,694
Inventory, Gross 20,329,899 12,495,826
Reserves (2,662,498) (221,722)
Total, net of reserves 17,667,401 12,274,104 [1]
Ground Equipment Manufacturing [Member]    
Raw materials 2,397,974 1,549,810
Work in process 1,002,710 408,213
Finished goods 7,723,641 4,328,812
Printing Equipment and Maintenance [Member]    
Raw materials 3,219,663 3,319,939
Work in process 798,031 759,446
Finished goods 901,769 562,912
Commercial Jet Engines Inventory [Member]    
Inventory, Gross $ 2,003,484
[1] Derived from audited consolidated financial statements