Note 7 - Inventories - Inventories (Details) - USD ($)	Sep. 30, 2016	Mar. 31, 2016
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
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